Chap. VIII. DEVELOPMENT OF AMPHIPODA. 77 



Thus, in order to give a few examples, the powerful 

 clielse of the antepenultimate pair of feet, of Phromina 



feet, into richly denticulated prehensile feet, and indeed of three 

 different forms, the anterior feet (fig. 44) the two following pairs 

 (fig. 45) and finally the three last pairs (fig. 46) being similarly con- 

 structed and different from the rest. ' In this form the feet remain for a 

 very long time, whilst the abdominal appendages grow into powerful 

 natatory organs, and the eyes, wliich at first seemed to me to be want- 

 ing, into large hemispheres. In the transition to the form of the adult 

 animal the last three pairs of feet (fig. 49) especially undergo a con- 



* Figs. 44-46. Feet of a half-grown Hyperia Martinezii, n. sp.'' Figs. 

 47-49. Feet of a nearly adult male of the same species ; 44 and 47 from the 

 first pair of anterior feet (gnathopoda) ; 44 and 48 from the first, and 46 and 

 40 from the last pair of thoracic feet. Magn. 90 diam. 



b N'amed after my valued friend the amiable Spanish zoologist, M. Francisco de Paula 

 Martinez y Saes, at present on a voyage round the world. 



