216 Bulletin Vanderbilt Marine Museum, Vol. VII 



but to possess such individual variation grading into typical A. 

 fugax as to render the A. latus specimens unstable as a variety. 

 The so-called latu^ specimens, the greater portion of which are 

 young specimens, mostly small females, were collected off South 

 Carolina, off the Florida Keys, in the northeastern portion of the 

 Gulf of Mexico, and one station west of Trinidad, in depths 

 ranging from 26 to 88 fathoms. These are deposited in the U. S. 

 National Museum, 



The one male specimen reported by the writer (1930) from 

 south of Marquesas Keys, Florida, in 70 fathoms, is a young male 

 having considerable variation from typical fugax. 



Amisimus latus, Rathbun, M. J., loc. cit., p. 65, pi. 214 (with 

 earlier references). Boone, L., Bull. Vanderbilt Mar. Mus., 1930, 

 vol. II, p. 74, pi. 20. 



Subfamily: Pisinae 



Genus: ROCHINIA A. Milne Edwards 

 Rochinia crassa (A. Milne Edwards) 



Plates 77 and 78 



Type: This species was first dredged by the U. S. Steamer 

 "Blake," in 229 fathoms, between Cuba and Florida, on the Pour- 

 tales Plateau, Lat. 24° 15' N., Long. 82° 13' W., a single male 

 specimen, deposited in the Museum of Comparative Zoology, Cat. 

 No. 2862, Cambridge, Massachusetts. 



Distribution: The known range of this interesting species 

 is confined entirely to deep-water dredgings in the western At- 

 lantic Ocean, off the coast of the United States, from Cape Cod, 

 Massachusetts, southward to southern Florida, where it has been 

 taken in depths ranging from 70 to 334 fathoms, by the United 

 States government steamers "Blake," "Fish Hawk" and "Alba- 

 tross," off Nantucket Shoals, south of Martha's Vineyard, off 

 Cape Hatteras, off Cape Romain, off Charleston, off Savannah, 

 off Fernandina, off St. Augustine, off Carysfort, in the Gulf 

 Stream, off Cape Florida, and south of Marquesas Keys, and off 

 American Shoal Light, off Sand Key Light and on the Pourtales 

 Plateau, in 90 to 110 fathoms, by the Biological Expedition of 

 the State University of Iowa of June, 1893. The "Alva" record 



