

CRUSTACEA. 



pair of legs, left side, has the summit obliquely truncate, the surface 

 being linear, very slightly concave and at right angles nearly with 

 the sides ; the outer edge is most raised and subcarinate. The tarsus 

 corresponding is carinate above and very nearly flat on outer surface. 

 The ocular peduncle (including cornea), hardly longer than .the base 

 of the outer antennae, is very much shorter than the base of the inner 

 antennae. 



P. deformis, Edwards, Ann. des Sci. Nat. [2], vi. 272, pi. 13 f. 4 j Crust., ii. 222. 





Pagurus asper (Be Haan). 

 Sandwich Islands. 



Length, two inches. The eyes and general characters of this 

 species are as in the difformis. The front margin is a little rounded 

 across the middle, and projects into a large tooth between either eye 

 and the outer antennae adjoining. It differs from the difformis in 

 having the penult joint of the left leg of the third pair convex on the 

 outer side, with the inner of the upper edges most prominent, and the 

 outer obtuse ; the tarsus is subcarinate, and has a raised ridge along 

 the outer side. The base of the outer antennae reaches a little beyond 

 the eyes ; the inner antennae are much longer than the eyes. The 

 second and third pairs of legs are very nearly naked, excepting the 

 tarsus, which on the inner surface bears tufts of short hairs. They 

 have some small tubercles along the upper side of some of the joints, 

 but not more than in the difformis. The larger hand in our specimen 

 is wanting. The smaller is quite small and tufted hairy. The sur- 

 face is somewhat uneven, being a little raised at the base of the tufts 

 of hairs, but it is not spinous. The specimen (a female) has three 

 appendages on one side of the abdomen and none on the other; each 

 is rather large, and consists of an oblong basal joint bearing three 

 curved linear ciliated lamellae; a fourth on the same side is very 

 small. There are also two oblong, fleshy, ciliated lobes, a short dis- 

 tance inside (that is, nearer the ventral line) of the second and third 

 of these appendages. 



P. asper, De Haan, Faun. Japon., 208, pi. 49, f. 4. 



