This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt: ...in In not buried in earth, but floating on water. The larva can descend into the water when attacked, but the pupa is too ...
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt: ...in In not buried in earth, but floating on water. The larva can descend into the water when attacked, but the pupa is too buoyant, and too much encumbered by its outer case, to execute any such manoeuvre. Provision has accordingly to be made for the protection of the helpless pupa against its many enemies. It is probable that hungry Insects and Birds mistake the shapeless larval skin, floating passively at the surface, for a dead object. The considerable space between the outer envelope, or larval skin, and the body of the pupa may keep off others, for the first bite of a Dytiscus or Dragon-fly larva would be disappointing. Still further security is gained by the texture of the larval skin itself. The cuticle consists of two layers. The inner is comparatively soft and laminated, while the outer layer is impregnated with calcareous salts, and extremely hard (Fig. 67,7, 8). The needful flexibility is obtained by the subdivision of the hard outer layer. Seen from the surface, it is broken up into a multitude of hexagonal fields, each of which forms the base of a conical projection, reaching far into the softer layer beneath. The conical shape of these calcareous nails allows a certain amount of bending of the cuticle, while the whole exposed surface is protected by an armour, in which even the pointed mandibles of a Dytiscus larva can find no effective chink. Swammerdam once found a pupa of Stratiomys dead within its larval skin. In the abdomen were larvae and pupa; of a parasitic Insect (perhaps an Ichneumon or a Tachina) which had sprung from eggs laid within the Stratiomys. Neither water nor hard skin can exclude these cruel and insidious enemies. The pupa-stage lasts for a very few days and then the fly emerges. The larval skin splits...
Good. No dust jacket. 1934. 359 pages. No dust jacket. Green cloth with gilt lettering on spine. Good copy with firm binding. Ex library book with stamp and pen inscription to front endpaper. Mild finger marking, tanning and foxing to endpapers and page edges. Sunning and lean to spine. Light rub marking and scratching to boards with bumps to corners. Mild edge wear to the boards and spine. World of Rare Books Item ref. 1464157602cla (Use this ID when enquiring about this item. )
Used-Good. In green cloth binding with gilt title on the spine, gilt title and illustration on front cover, without dustjacket, previous owners bookplate on inside cover, minor shelfwear to extremities of covers, contents fine.
Very Good. Small 8vo 395 pp; Minor edge wear on corners and spine ends, very light scuffing, spine is slightly darkened. Gilt lettering and decoration is bright. Binding is a little cocked but still tight, previous owner's name on front endpage. An attractive book.
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In fair condition, suitable as a study copy. No dust jacket. Green covers, gilt decorative imprint on front, gilt lettering on backstrip, internally fair., 700grams, ISBN:
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