35 



335 



forms are conspecific wilh species of which the female only has been described. 

 For example, the differences in the maxillipeds of P. bürgert, female, and of P. 

 kulensis, male (compare figures 12 b and 19 c) may be either sexual, or referable to 

 their position while being drawn. Descriptions of the males follow. 



Pinnotheres kamensis Rathbun. 



Pinnotheres kamensis. Rathbun, Proc. Biol. Soc. W^ashington, XXII, 110, 1909. 



Male. — Carapace broad-ovate, with an obscure antero-lateral angle, surface 

 coarsely punctate. Front strongly advanced beyond the orbits, slightly bilobed. 

 Eyes large, visible from above; orbits in the lateral margin of the carapace; corneæ 

 small, black. 



Inner margin of merus of maxilliped strongly angled ; pro- 

 podus long and narrow; dactylus inserted behind the middle of 

 the propodus and not nearly reaching end of same. 



Chelipeds stout; palms swollen, not much longer than wide 

 and not much longer than the fingers, which gape widely; a 

 small tooth at base of dactyl. 



Legs broad, first three pairs subequal, last pair very much 



smaller; daclyli of all legs strongly curved, in first three pairs 



subequal, in fourth pair smaller. 



T^ ■ »I 1 I 11 1 1 -j.i , r Fig. 18. Maxilliped of 



Dimensions. — Male, length r4 mm., width lo mm. d- ,, , ■ 



' ° ' Pinnotheres kamensis, 



Type locality. — West of Koh Kam, 5 fathoms, gravel; typec?, 1-5 mm. wide. 

 II. 6; 1 c?. 



Pinnotheres kutensis Rathbun. 



Pinnotheres kutensis Rathbun, Proc. Biol. Soc. Washington, XXII, 110, 1909. 



Male. — Carapace oblong- 

 hexagonal, thin, transparent, 

 margin not defined. Front ad- 

 vanced, subtruncate. Eyes large, 

 projecting well beyond outline 

 of carapace. The antennules are 

 in an unnatural position in 

 figure 19 a. The specimen was 

 so disguised with mud and 

 debris clinging to the hairs 

 that it was soaked in a dilute 

 solution of chloride of soda, 

 which probably extended the 

 antennules and the maxillipeds. 

 Sternum rough. The pal- 

 pus of the maxilliped when 

 43* 



Fig. 19. 



Pinnotheres kutensis, type cS, lü'2 mm. wide: a, dorsal view; 



b, abdomen and appendages; c, ma.\illiped. 



