330 ME. E. J. MIERS's REVISION Or THE HIPPIDEA. 



straight at its proximal extremity ; that of the female is longer 

 than broad, oblong-oyate. Length of carapace of largest speci- 

 men about 1| in. 



Hdb. West Indies, St. Christopher's; Cayenne; Brazil {Coll. 

 Brit. Mus.). 



In this species, as in all the preceding, the spine at the antero- 

 lateral angle of the carapace is of moderate length, not reaching 

 beyond the level of the anterior margin of the carapace, and the 

 median semicircular emargination of the front about twice as 

 wide as deep. 



Alhunea paretii, Gruerin-Meneville, Eev. et Mag. Zool. ser. 2, v. 

 p. 48, pi. i. fig. 10 (1853), may not improbably belong to this 

 species. The type specimen was, as its author states, given to 

 him by the Marquis Pareto with some Crustacea obtained in the 

 neighbourhood of Grenoa ; but he had also received other Crus- 

 tacea from America from the captain of a merchant vessel, and 

 consequently was unable to speak positively as to the habitat of 

 the species. It differs from A. symnista and A. guerinii princi- 

 pally in its elongated and very narrow eye-peduncles (which are 

 represented as even longer and narrower at base than are those 

 of ^. oxyophthalmd), subelongate and less crowded frontal spines, 

 and narrower terminal postabdominal segment. The uncertainty of 

 the habitat and brevity of the description render it impossible to 

 determine its position with certainty, without an examination of 

 the typical specimen. 



Albunea lucasii. 



Albunea lucasia, Saussure, Rev. et Mag. Zool. v. p. 367, pi. xii. fig. 4 

 (1853). 



Albunea lucasii, Stimpson, Journ. Bost. Soc. Nat. Hist. vi. p. 485 

 (1857). 



This species is characterized by De Saussure as having a very 

 deep median frontal emargination, styliform ocular peduncles, and 

 a very long spine on each side of the carapace. Length of cara- 

 pace about 1 inch. 



Sai. Mazatlan {De Saussure). 



This species, in the form of the eye-peduncles, very nearly re- 

 sembles the preceding ; but the diflTerences instanced by De 

 Saussure appear sufficient to warrant its specific separation, if 

 regard be had to its recorded habitat being on the western, not 

 the eastern, coast of the American continent. In De Saussure's 

 figure of the carapace, the frontal margin is represented as 8-10- 



