in the Museum of the Sraithsonian Institution. 103 



differs greatly from Cryptopodia in the want of a posterior ex- 

 pansion of the carapax, and in the existence of a ridge on the 

 pterygostomian region defining the afferent passage. 



H. granulata inhabits the seas of the Southern States and of 

 the West Indies, 



Heterocrypf a iBaacrobrachia, nov, sp. 



Body depressed. Carapax narrower and less triangular tlian tliat 

 of If. granulata, but resembling it in its granulated ridges and pro- 

 tuberances. Antero-lateral margin regularly convex, and crenulated 

 with fourteen or fifteen teeth which are themselves denticulated. 

 Margin between the lateral angle of the carapax and the projecting 

 terminus of the brauchial ridge profoundly concave. Posterior mar- 

 gins crenulated like the anterior, with a somewhat larger tooth on 

 each side at the juncture of the posterior with the posterodateral 

 margins. Exognath of the external maxillipeds not tuberculated. 

 Chelipeds very long, smooth, and naked above, except at the crenulated 

 edges. Ambulatory feet compressed ; meros-joint with sharp, minutely 

 denticulated lower edge. 



Color yellowish ; sometimes with bluish-gray patches on the cara- 

 pax, and bands of the same color across the chelipeds. 



Dimensions of a male: Length of cai-apax, 0.5G; breadth, O.GO ; 

 length of meros of chelipeds, 0.4G ; length of hand, 0.55 inch. 



It differs from II. granulata in its longer chelipeds, and 

 more strongly toothed margins of the carapax. 

 Taken at Panama by Capt. J. M. Dow. 



CAIN^CROIDEA. 

 liloifiiera cinctiinaiia. 



Ciirpilius cinctimanus Adams and White, Voy. Samarang, Crust., p. 37 ; pi. 

 vii, fig 4. 



Liomera dnctimana Dana, IT. S. Expl. Exped., Crust., I. IGl. A. Milne - 

 Edwards, Nouv. Arch, du Mus. , I. 219. 



The dactyliis of the ambulatory feet is white, with a red base 

 and black tip. 



