622 



PROCEEDINGS OF THE X\TI<>\ \i UUSEUM. 



vor, 38. 



Palp of anterior maxillae with a row of spines along inner margin of Becond seg- 

 ment; outer lobe armed with six Large spines. Posterior maxillae with only a rudi- 

 ment of an inner lobe, armed with three small spines; miter lobe bear- ten spines on 

 distal margin. Inner lobe of maxillipeds reaches a third the length of the contiguous 

 article. 



interior gnathopods remarkable for the size of their meral article, which is almosl 

 twice as long as carpus and is prolonged to extremity of the latter; propodus oval, 

 much longer than carpus, and nearly twice as long as wide; its palmar borders sepa- 

 rated from the posterior bonier by a group of small spines upon which the extremity of 

 the dactyl can rest; distal part of inner border of dactyl bears a small tooth. 



Posterior gnathopods well developed; basal article recurved rather strongly in distal 



part; three following articles very short; propodus oval, more than twice as long as 

 w ide, anterior border a regular curve; posterior border, fused with palmar border, bas 

 a straight portion, finely ciliated, ending, near articulation of dactyl, in a long, sharp, 

 curved tooth, followed by a deep, narrow cut ; dactylus as long as propodus, abruptly 

 benl near its base, finely ciliated on the greater part of its inner border, which has a 

 slight emargination near the tip. 



FIG. 1. — STENOTHOfi ASSIMILIS, MALE ■ [5. A.FTER CHEVREUX. 



In the peraeopods of the firsl two pairs, the merus is produced forward to form a 

 sharp lobe; propodus much longer than carpus. 



Basal article of peraeopods of third pair narrow, anterior and posterior margins par- 

 allel : merus similar to, but larger than, thai of preceding peraeopods. 



Basal article of peraeopods of two last pairs strongly dilated behind, nearly as wide 



as long in fourth pair, and notably wider than long in fifth pair; merus prolon 



nearly to end of carpus. Peraeopods of fifth pair shorter than the preceding. 



Extremities of three pairs of uropods reach nearly the same line. Peduncle of 



uropods of last pair much Longer than branch: firsl article of branch not quite so long 

 as last one. 



Telson Bubtriangular, a little Longer than wide, bearing three pairs of Large lateral 

 spines. 



/•'< umli . - A nt en me a little shorter than in male. Anterior gnathopods differ little; 

 nevertheless, in the female the merus is less developed and i- not nearly twice 

 long as carpus. Posterior gnathopods almost as Large as in male but differ in the 



propodus a little shorter, and the palmar margin bearing only one short, straight tooth 

 and no dee), cut ; dactyls regularly curved. 



