GOPALAKRISHNAN: BIOLOGY AND TAXONOMY OF NEMATOSCELIS 



Figure l.-a. Nematoscelis atlantica, male (length = 13.2 mm; Indian Ocean, position: lat. 28°08'S, long. 66°09'E); b. N. microps, female 

 Oength = 16.3 mm; Indian Ocean, position: lat. 10°06'S, long. 41°5rE). an, antennule; ca, carapace; car, carpus of second leg; da, dactylus 

 of second leg; en, endopod of antenna; gi, gill; is, ischium of second leg; me. merus of second leg; mp. mandibular palp; pe, petasma; ph, 

 photophore; pi, pleopod; pr, propodus of second leg; ro, rostrum; sc, scale of antenna; te, telson; thy, first thoracic leg; th2, second thoracic 

 leg; ur, uropod. 



The furcilia phase of Nematoscelis was defined 

 in Gopalakrishnan (1973) as follows: compound 

 eyes no longer under carapace, but project outside; 

 antenna retains larval natatory function; pleopod 

 becomes functional, each appears first as non-se- 

 tose rudiment which develops setae at following 



moult; furcilia, therefore, with different states of 

 development of pleopods. The following key for 

 identifying furcilia larvae to species is based 

 mostly on diagnostic features of the carapace. 

 There are three developmental stages in the fur- 

 cilia phase. 



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