GOPALAKRISHNAN: BIOLOGY AND TAXONOMY OF NEMATOSCEUS 



1.0 m m 

 I I 



0-2 mm 



d,e 



Figure 9.-Neinatoscelis lobata: a, male carapace (body length = 12.1 mm); 6, female carapace (body length = 13.5 mm); c, eye; d, distal 

 part (propodus and dactylus) of first thoracic leg (maxilliped); e, dactylus of second thoracic leg showing arrangement of apical spines. 



of carapace between apex of keel and the point 

 above photophore on seventh thoracic segment; 

 distance between photophore on coxa of second 

 thoracic leg and photophore on coxa of seventh 

 thoracic leg; length of proximal process of petas- 

 ma; basal widths of lateral and proximal processes 

 of petasma. 



Nematoscelis tenella differs from other species 

 in length of carpus of second thoracic leg, width of 

 lower lobe of eye, lengths of merus and propodus 

 of second thoracic leg, length of lateral spine of 

 protopod of antenna, lengths of spine-shaped 

 process and terminal process of petasma and basal 

 widths of spine-shaped process and terminal 

 process of petasma. 



The lengths of the spine-shaped process and 

 proximal process of the petasma and number of 

 marginal setae on the pseudexopod of the max- 

 illule of A^. difficilis are different from A^. 

 megalops. The species pair A'^. difficilis-N. 

 megalops differs from other species in the follow- 

 ing characters: basal length of keel; length of scale 

 of antenna; lengths of carpus, dactylus, and lon- 

 gest spine on distal end of second leg; lengths of 

 ischium and merus of first thoracic leg; vertical 

 length and width of lower lobe of eye; dorsal 

 length of first abdominal segment; length and 

 basal width of terminal process of petasma; 

 number of marginal setae on exopod of maxilla, 

 endopod and pseudexopod of maxillule, and on 



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