MUSEUM OF COMPARATIVE ZOOLOGY. 153 



finely denticulate, and separated from the orbital areolets by a groove. Antero- 

 lateral border of the carapace armed with four spines or teeth, E, N, T, S, of 

 Dana's nomenclature, there being no tooth at the external orbital angle ; of 

 these teeth the first is the smallest, the third the largest, and the second and 

 fourth are of about equal size ; the margins of all the teeth are denticulate. 

 The chelipeds are short and unsymmetrical ; the merus is granulated on its 

 outer face, spinulose on the upper edge, and grooved near the articulation with 

 the carpus. The carpus is granulated on its outer side, and furnished with a 

 median internal tooth. The meri of the ambulatory appendages are spinulose 

 along their upper edges. 



Length of carapace, 8 mm. ; breadth, 11 mm. 



Station 3355. 182 fathoms. 1 male, 1 female. 

 " 3391. 153 " 1 male, 3 females. 



Panopeus latus, sp. nov. 



Carapace broad, convex in antero-posterior direction, granulated, especially 

 on the hepatic, branchial, and cardiac regions; areolations well marked and 

 protuberant. Front divided by a small median incision into two slightly con- 

 vex lobes, whose edges are simple and not produced into teeth at the lateral 

 angles. Antero-lateral margin cut into five teeth; post-orbital tooth small, 

 separated from the second tooth by a shallow granulated sinus ; the third tooth 

 is the broadest, and rounded off at the apex; the fourth is the most salient, 

 and acute ; the fifth is very small, and acute ; all the teeth have crenate or else 

 spinulose margins. The margin of the orbit is minutely crenulate; its upper 

 part is marked by two closed fissures ; the external hiatus of the orbit has the 

 form of a triangular notch ; the lower margin is produced to form an obtuse 

 tooth at the inner angle. The subhepatic region is granulous, but not pro- 

 vided with a tubercle. The merus of the third pair of maxillipeds is also 

 granulated. The carpus of the chelipeds is rough with small tubercles, grooved 

 along the distal margin of the outer side, and armed internally with a small 

 blunt tooth ; the hands are robust, inflated, smooth except near their articu- 

 lation with the carpus where scattering granules appear ; upper and lower mar- 

 gins rounded; fingers long, down-curved, smooth, canaliculate, their cutting 

 edges irregularly armed with small and rather sharp teeth, without any promi- 

 nent basal tooth; when closed the fingers are separated by a slight gape, and 

 their tips cross one another; the color of the fingers in alcoholic specimens is 

 very light brown. The chelae of the right and left sides are unequal in size, 

 but similar in shape. The ambulatory appendages are setose, their merus 

 joints furnished with small teeth along their upper edges. The seventh seg- 

 ment of the sternum in the male is entirely concealed by the base of the abdo- 

 men. The coxge of the fifth pair of legs are in contact with the third abdominal 

 segment. The penultimate segment of the abdomen has concave sides, the 

 terminal segment is broad and rounded. 



