86 Notes on North American Crustacea. 



what compressed, with a reddish vitta above ; cornea very small. The 

 ej-es reach beyond the middle of the terminal joint of the peduncle of 

 the external antennae. The acicle is hairy, rough with spiniform points, 

 and does not reach to the tips of the eyes. Chelipeds tuberculated above, 

 and sparsely hairy ; tubercles rather sharp, the larger ones arranged in 

 longitudinal rows ; carpus with a broad longitudinal channel between two 

 rows of tubercles above, tubercles of the marginal row spiniform ; fingers 

 with strongly and densely tuberculated surface, soniewhat gaping within, 

 and dentated with equal tuberculiform teeth ; tips corneous, sharply pro- 

 minent. Feet of the second and third pairs subcylindrical, roughly gra- 

 nulated; dactyli not compressed, with six or seven slightly prominent, 

 longitudinal, crenulated, and hairy costae. Hand of the fourth pair of 

 feet oblong; dactylus slender, not compressed, and scarcely over-reaching 

 the tip of the rounded thumb-like process of the hand. Abdomen thickly 

 covered with long hair ; terminal joint scarcely emarginated. The cha- 

 fing areolae or callosities of the inferior surfaces of the feet near their 

 bases, are numerous and well-marked. Length about 2| inches. Length 

 of carapax, 0-Y2 ; breadth posteriorly, 0*65 ; breadth of front, 0*28 ; 

 length of chelipeds, 1-10 ; of ambulatory feet, 1-75 inch. 



It is allied to I. cBquimanus, but the hands are more strongly 

 tuberculated, and the tarsi are not compi*essed as in that species. 



Found in the Gulf of Mexico, at the mouth of the Rio Grande, 

 by G. Wurdemann, Esq., whose extensive and long-continued 

 researches in the zoology of our southern coast have furnished 

 us with many interesting novelties. 



Pa^tiristes turg^idus. 



Clibanarius turgidus^ Stimpson ; Crust, et Echin. Pacific Coast of N. 

 Am., p. 44; pi. xxi. f. 1. 



The anterior or gastric portion of the carapax is fasciculated with 

 hairs towards the sides, and bears a single tuft in the median line. The 

 anterior cardiac lobe is elongate-triangular, slightly convex near the 

 base, but not dilated toward the pointed extremity. Rostriform tooth 

 very short, and not more prominent than the lateral points, which are 



