252 Annals of the Smith African Museum. 



Both dentatus and semidentatus are distinguished from thompsoni 

 Walker (Proc. Liverp. Biol. Soc. vol. 12, p. 283, pi. 16, figs. 3-6) by 

 having 3 teeth on pleon segment 4, instead of 2 as in the latter species, 

 and also by the 2nd gnathopod. 



The 2nd gnathopod of ? bears some resemblance to that of E. 

 thomsoni (Stebb.), but that of the is rather different so far as can 

 be judged from Stebbiug's description (Sci. Ees. " Thetis, "pt. 12, p. 614, 

 1910). It is compared with the 2nd guathopod of Elasmoides chev- 

 reuxi Stebb., but such a comparison will not hold good for the present 

 species. 



GEN. CHEVALIA Walker. 



1904. Chevalia Walker in Herdman's Ceyl. Pearl Fish. Suppl. Eep. 



17,p. 288. 



1906. Stebbing, Das Tierreich, 21, p. 737. 

 1912. Pearse, Proc. U.S. Nat, Mus. vol. 43 [1913], p. 374. 



CHEVALIA AVICULAE Walker. 



1904. Chevalia aviculae Walker, I.e. p. 288, pis. 7, 8, fig. 50. 

 1906, Stebbing, I.e. p. 737. 



1909. Walker, Tr. Linn. Soc. Lond. vol. 12, pt. 4, 



p. 341. 



These specimens agree with Walker's description. The 6th joint 

 of the 2nd gnathopod is twice as long as the 5th, the palm is finely 

 crenulate and the defining angle is not quite so prominent as in 

 Walker's figure. The uropods and telson are exactly as Walker 

 figures them. 



Length : 5 mm. 



Colour : In spirit, whitish, eyes reddish-brown. 



Locality : Cape St. Blaize N. by E., distant 73 miles. 125 fathoms. 

 8 specimens, apparently all <$ $ . s.s. " Pieter Faure." 21/12/99. 

 (S.A.M. No. A3813.) 



Geogr. Distribution : Ceylon ; Seychelles, 22-26 fathoms (Walker.) 



FAMILY AMPITHOIDAE. 



1899. Amphithoidae Stebbing, Ann. Mag. Nat. Hist. ser. 7, vol. 4, 



p. 211. 



1906. Ampithoidae id. Das Tierreich, 21, pp. 631, 738. 

 1910. id. Gen. Cat. S.A. Crust, p. 462. 



