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 



