85 



Loxorynchus grandis. Carapax warty, the warts being 

 small and very numerous, blunt on the central portions and spine- 

 like on the sides. Surface between the warts minutely granulated ; 

 depressions between the regions filled with short hairs. Feet 

 mostly covered with short pubescence ; those of the first pair with 

 the fingers denticulated along the whole extent of their inner sur- 

 faces ; carpus tuberculous above ; third joint with four small spines 

 along the upper margin, the largest at the articulation with the 

 carpus. A single spine near the extremity on the third joint of 

 the second and third pairs of feet, and a tubercle on the fourth joint. 

 Feet of the fourth and fifth pairs smooth. Length of carapax 

 5.55 inch. The animal appears to have been of a rose-color 

 when alive. Taken on the coast near San Francisco, by Lieut. 

 Trowbridge. 



Randallia, (nov. gen. LeucosiacUe.) Carapax oval, subglo- 

 bose, nearly smooth, glabrous, armed with two teeth posteriorly ; 

 pterygostomian regions angular. Front narrow, but higher or 

 thicker than in Persepkona, concave at the middle. Orbits three- 

 notched. Antennary fossae small, oblique, and very deep. Basal 

 article of internal antennas somewhat expanded, operculiform, 

 completely closing the aperture of the fossa when the antenna is 

 retracted. Fossae not immediately bordering on the buccal margin 

 as in Persepkona, but separated by a considerable space, so that 

 the epistoma presents much greater surface than is usual in the 

 family. External maxillipeds and feet as in Persepkona. 



R. ornata. Ilia ornata, Randall, Jour. Acad. Nat. Sci., VIII. 

 129. Guam ornata, Gibbes, Proc. Am. Assoc. 1850, p. 186. 



Hippa analoga. H. emerita, De Saussure, Rev. et Mag. 

 Zool., V. 367. H. talpoides, Dana, Proc. Phil. Acad., VII. 175. 

 (non Say.) Taken in considerable numbers on the coast of 

 California, by Mr. Samuels. A careful comparison shows con- 

 stant differences between this species and that of the Eastern 

 coast, which will be fully enumerated in my forthcoming paper 

 in the Journal. 



Porcellana RUPicoLA. Moderately depressed, without 

 spines ; front triangular, considerably deflected, with a blunt ex- 

 tremity, and a notch or groove at the base separating it from 



