201 



ncptumts (Dana) 



Theano de Man 



d x Terminal spine of scaphocerite shorter than the antennular 



peduncle. 



e-y Lateral spine of basicerite not yet reaching to the middle of 



median antennular article, terminal spine of the scaphocerite 



not yet extending to the middle of third article-, fingers of 



the smaller chela hardly shorter than the palm, the proportion 



to the total length being as i : 2,25 



(J. D. DANA, U. S. Explor. Exp. Crustacea, p. 553, PI. XXXV, fig. 5. — Confer 

 also: H. COUTIÈRE, in: Proc. U.S. Nat. Mus. XXXVI, 1909, p. 87 — 89, fig. 53). 



e„ Lateral spine of basicerite reaching the apex of median anten- 

 nular article, terminal spine of scaphocerite extending to the 

 distal 3 ld part of third antennular article ; proportion between 

 the length of the fingers of small chela and the total length 

 as 1 : 2,7, the fingers shorter than in Syn. ncptunus . 

 d a Terminal spine of scaphocerite much longer than the antennular 

 peduncle and even slightly reaching beyond the carpocerite. 

 Lateral spine of basicerite not yet reaching to the apex of 

 median antennular article. Proportion between the length of the 

 fingers of the small chela and the total length as 1 : 2,5 l ) . laticeps Cout. 

 (H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 874, PI. LXXII, fig. 11). 

 c„ Carpocerite 9-times as long as wide. Anterior pair of spinules of 

 the upper surface of the telson arranged in a regular quadrate, 

 rather far distant from the lateral margins. Terminal spine of 

 scaphocerite a little shorter than antennular peduncle, outer margin 

 of scaphocerite very concave, blade rudimentary, reaching to the 

 middle of median antennular article. Antennular peduncle 6-times 



as long as» wide. Ova large, 1,46 mm. long Antenor de Man 



b„ Superior spine of basicerite extraordinarily large, half as long as the 

 lower that almost reaches to the middle of median antennular article. 

 Median part of the posterior margin of telson extremely narrow, less 

 broad than the lateral parts, spinules of the upper surface very large. 

 Small chela as in Syn. laticeps Cout Pescadorensis Cout. 



Remarks to the preceding keys. 



To the Neomeris group also appertains Syn. mcrospinigcr Cout. (Bulletin Soc. Philom. 

 Paris, 1908, p. 5). The place of this species in the key is uncertain, because nothing is known 

 about the length of the ventral or principal hook with regard to the length of the dactyli 

 that are biunguiculate. Merus of third legs spiniferous. The ventral or principal hook 

 is hardly thicker than the other and its margins are curve d: through this character this 

 species may easily be distinguished from those of the section a Y ó 1 , to which it belongs. 



1) This number has been deduced from the figure I la in Coutière's paper 



69 



