ACADEMY OF SCIENCES. 77 



Four hinder pairs short, slender, cylindrical, setose, except the tarsus, which 

 is smooth and shining, like the manus of the first pair. Carapax and abdomen 

 tomentose above and below. A single specimen, male, found among a num- 

 ber of another species from different localities, so that its locality is uncertain, 

 further than that it is from Lower California. Length and breadth nearly 

 equal, about eight millimetres. 



This species differs from Peltinia, Dana, in the length of the eyes. The an- 

 tennas are not hidden by the rostrum, so that it is impossible to place it 

 among the Epialtince. It appears to me to be in its characters intermediate 

 between Acanthonyx and Epialtus, and therefore should find a place in Peltinia, 

 but to accommodate it the character, "Eyes not retractile, short," must be 

 changed to " Eyes not retractile, of variable length." 



epialtin^;. 



34. Epialtus productus. Eaudall. J. A. N. S. Phil., VIII, 110, Gibbes. 



Proc. Am. Asso., 1850, p. 173. Dana. U. S. Ex. Exp., I, 133, pi. 

 VI, f. 2. 



The figure in Dana's work represents the female, which differs so much 

 from the male that it might easily be mistaken for a distinct species. The 

 largest specimen in this collection is a male from Santa Eosa Island, Cal., 

 collected and presented by W. G. W. Harford. This specimen displays well 

 the differences between the sexes. It is armed with a large pair of chelipeds, 

 the hand and fingers of which equal in length the breadth of the carapax. 

 The four hinder pairs of legs are long and slender, and the carapax in all its 

 dimensions greatly exceeds that of the female. 



No. 4. Male, fine specimen, dried. Santa Barbara. W. G. W. Harford. 



No. 5. Female, dried.- Donor unknown. 



35. Epialtus Nuttallii. Randall, he. cit., VIII, 109, pi. IJI. Gibbes. be. 



cit., p. 173. 



It is rather strange that this crustacean should not have found its way into 

 our collection. Randall gives " Upper California " as its locality. 



36. Epialtus minimus. Lockington. nov. sp. 



Rostrum larger than usual in the genus, the emarginated extremities diver- 

 gent. Trans-orbital width small. No pre-orbital or post-orbital spine. An- 

 tero-lateral margin with two triangular teeth, the anterior much the largest, 

 their front margin at right angles to the carapax. Without the anterior 

 of the teeth, the form of the carapax would be triangular. Distance from 

 the anterior line of the first teeth to tip of rostrum about equal to the poste- 

 rior portion of the carapax. First pair of feet in the male longer than the 

 second, fingers obtuse and imperfectly spoon-shaped at their tips. Eight pos- 

 terior feet slender, cylindrical, naked, except terminal joint, which is fringed 

 below with short setae. Penultimate joint with one or two small spines on 



