214 



Bulletin, Vanderdilt Marine Museum, Vol. Ill 



Color: In life the animal's body is brownish, maculated; with the 



antennae and antennulae bright red. 



Discussion: The single specimen taken by the "Ara" agrees well 



with Stimpson's excellent description and figures. 



Synonymy: Cerapus ruhricornis Stimpson, Marine Invert, of Grand 

 Manaan, p. 46, pi. 3, fig. 33, 1853. — Bate, Catal. Amphip. Crust. 

 British Museum, p. 256, pi. 45, fig. 4, 1862. — Verrill and Smith, 

 Kept. Comm. Fish, and Fisheries, p. 565, pi. 4, fig. 18, 1873. — 

 Erichtonius ruhricornis S. I. Smith, Trans, Conn. Acad. Arts and 

 Sci., vol. 4, pt. 2, p. 278, 1882.— Holmes, Bull. U. S. Bur. Fish, 

 vol. 24, p. 518, 1904 (issued 1905).— Rathbun, M. J., Occas. 

 Papers Boston Soc. Nat. Hist., vol. VII, p. 73, 1905. — Sumner, 

 et at., Bull. U. S. Bur. Fish., vol. 31, part 2, p. 655, 1911. 



CIRRIPEDIA. 



Family: LEPADIDAE Darwin. 



Subfamily: Lepadinae. 



Genus : POECILASMA Darwin. 



Subgenus : Poecilasma s. s. Pilsbry. 



Peocilasma inaequilaterale Pilsbry. 



Plate 81. 



Type: Taken at ''Albatross" station 2744, 38° 35' N. Lat., 73° 05' 

 15" W. Long., depth 554 fms., deposited in the United States National 

 Museum. 



Seven specimens fastened on the back of the crab Cancer horealis, 

 dredged in 1100 fms., off Miami, Florida. 



Distribution : According to Dr. Pilsbry, this species is known from 

 nineteen "Albatross" stations off the eastern coast of the United 

 States, between 39° 53' and 37° 34' 30" Lat. N., in depths ranging 

 from 444 to 963 fms., chiefly on the carapace of the deep-sea crab, 

 Geryon quinquedons. Also from the U. S. Fish. Commission station 

 1140, off Martha's Vineyard, in 374 fms. on Geryon sp.; from "Alba- 

 tross" station 2237, Hampton Roads, Va., in only 12 fms., on Geryon. 

 It was also taken off Key West, Florida, in 70-80 fms., by the State 

 University of Iowa, 1923. 



The "Ara" specimen is the greatest depth from which the species 

 has been taken, i.e., 1100 fms., and also establishes a new commensal 

 host, Cancer horealis, for the species. 



