92 Notes on North American Crustacea. 



dactylus of the right one ; fingers gaping. Ambulatory feet smooth ; a 

 small spine at extremity of the carpal joint ; dactyli very short, shorter 

 than the penult jomt and not twisted. Color pale reddish ; feet with 

 interrupted longitudinal stripes of darker red. Length about one inch. 



Found at Barbadoes, by Mr. Gill. 



Etipa^iiriis pollicaris. 



Pagurus pollicaris, Say ; Jour. A. N. S., Philad., i., 162. 

 " " Gould ; Inv. Mass., 329. 



" " Gibbes; loc. cit., 189. 



Common on tlie eastern coast of the United States. Found 

 at St. Augustine, Fla., by Dorman ; and at Brazos Santiago, 

 Texas, by Wurdemann. 



Eupag:iirtis operculatus, nov. sp. 



Plate I., figs. 9 and 10. 



This species may be easily recognised by the great expansion of its 

 right cheliped, the hand of which is one half broader than the cara- 

 pax, and serves as an operculum, closing the aperture w^hen the animal 

 retires within the shell which it inhabits. This hand is broader than 

 long, very thin, with the margins expanded and lamelliform ; surface 

 even, granulated minutely above but more prominently below ; superior 

 surface of dactylus with a median ridge ; carpus subtriangular, margined 

 on either side "by a ridge, that on the left side denticulated. Left 

 cheliped subcylindrical, very slender and weak ; carpus with a row of 

 minute spines above. Ambulatory feet slender, glabrous, nearly naked, 

 with a spine at the apex of the carpal joint ; dactylus shorter than the 

 penult joint, and armed below with corneous spinules. Dactylus of 

 fourth pair of feet broadly expanded. The carapax is smooth and 

 glossy, naked ; eyes exceeding the much carved acicle in length, and 

 scarcely shorter than the peduncle of the outer antennae ; apex of oph- 

 thalmic scales long and slender. In the great cheliped the carpus is 



