396 PROCEEDINGS OF THE ACADEMY OP [1879. 



and spoon excavate. Smaller specimens agree perfectly with 

 Stimpson's description, while the smallest specimen has all the 

 anterolateral teeth obsolete. 



Sex. 

 I 

 % 



Stimpson's types, two in number, were from Cruz del Padre, 

 Cuba. 



Family ERIPHID-Si Dana. 



Sub-Family Oziinae Dana. 



Genus HETERACT^IA. Lockington. 1 



In the two species which I have examined the following charac- 

 ters may be noted. Form similar to that of Pilumnus, which it 

 closely resembles in the antennae and external maxillipeds. It, 

 however, differs in the absence of a palatal ridge and in the curious 

 naked crests on the meral joints of the ambulatory feet. The 

 orbits have the external hiatus more or less distinct, and below 

 have two lobes. It forms one of these synthetic forms, which 

 like XanthodiitSi Eurytium, Eurycarcinus, Pilumnopeus, Micro- 

 panope, etc., combine the characters of both Cancroid and Eriphioid 

 Crustacea. The type is Heteractsea lunata. 2 



Heteractaea ceratopus Kingsley. 



Pilumnus ceratopus Stm., Ann. Lye, vii. p. 215. 



Pilumnus sp. Desbonne et Scbramm., op. cit. , p. 33, pi. iii. f. 9-10. 



A male was collected at Key West, Fla. Key Biscayne, Fla. 

 (Stimpson), Guadeloupe (Desbonne). 



Genus PILUMNUS Leach. 

 Pilumnus aculeatus M. Edw. 



Cancer aculeatus Say, 1. c, i. p. 449. 



Pilumnus aculeatus Guerin, Iconog. Regne Animal, Crust., pi. iii. f. 2. 

 Edw. Hist. Nat. Crust., i. p. 420. Gray, in Griffith's Cuvier, vol. 13, 

 pi. iv. f. 2, 1833. Martens, 1. c, xxxviii. p. 91, pi. iv. f. 6. 



1 Proceedings of the California Academy of Sciences, vol. vii. p. 97, 1876. 

 a Heteractsea lunata Kingsley. 



Pilumnus lunatus Edwards et Lucas in D'Orbigny's Voyage dans 



l'Amerique Meridionale, Crustaces, p. 20, pi. ix. f. 2. 

 Heteractcea pilosa Lockington, Proc. Cal. Acad., vii. p. 97. 

 Gulf of California! (Fisher), C. St. Lucas and Central America (Stimp- 

 son), Chili (Edw. et Lucas, Nicollet). 



