THE ANNALS AND MAGAZINE OF NATURAL HISTORY. [THIRD SERIES.] " perlitora spargite museum, Naiades, et circum vitreos considite fontes : Pollice virgineo teneros hie carpite flores : Floribus et pictum, diva;, replete canistrum. At vos, o Nymphse Craterides, ite sub undas ; Ite, recurvato variata corallia trunco Vellite muscosis e rupibus, et mihi conchas Ferte, Dese pelagi, et pingui conchylia succo." N. Partkenii Giannettasii Eel. 1. No. 43. JULY 1861. I. — On the Morphology of some Aruphipoda of the Division Hyperina. By C. Spence B^te, F.R.S., F.L.S., &c. [Plates I. & II.] 1 HE changes that the Crustacea pass through in their passage from the earliest larval condition to the adult form, have been looked upon as among the most interesting features in their history. Changes that assume a character approximating to what some have termed metamorphosis have only been recognized in the development of the Podophthalmous and Entomostracous forms, while the intermediate orders, known as the Edri-ophthalma, have been known to vary little in form between the parent and the larva. Milne-Edwards and Gosse have both in-dicated that some more than ordinary difference of form exists between the adult and young animals belonging to some genera of the division Hyperina ; but their observations do little more than show that an exaggeration of one part takes place at the expense of another, and that some of the least important organs have yet to be developed. It is not my intention to allude here to the development of Hyperia, since there will be an opportunity for that in the work on the British Sessile-eyed Crustacea, shortly to be published. The favourable opportunities afforded me for the study of this division of the Amphipoda while engaged upon the Catalogue Ann. fy Mag. N. Hist. Ser. 3. Vol. viii. 1
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