CHAP. VIII. DEVELOPMENT OF AMPHIPODA. 



77 



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



chelae of the antepenultimate pair of feet, of Phromina 



n 



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, which 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- 



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

 4i) from the last pair of thoracic feet. Magn. 90 diam. 



b Named after my valued friend the amiable Spanish zoologist, M. Francisco de Paula 

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



