288 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 57. 



HEMITHYRIS CRANEANA Dall. 



Hemithyris craneana Dall, Proc. U. S. Nat. Mus., vol. 17, p. 717, pi. 31, figs. 5-6, 

 July, 1895. 



Type locality. — Off Cocos Island, Gulf of Panama, at Bureau of 

 Fisheries station 3362, in 1,175 fathoms, mud, bottom temperature 

 36° 8 F. 



Only one specimen of this species has so far been obtained. 



HEMITHYRIS CORNEA Fischer. 



Rhynchonella cornea (Fischer MS.) Davidson, Mon. Rec. Brach., pt. 2, p. 171, 



pi. 25, figs. 5, 6, 1887. 

 Rhynchonella {Hemithyris) cornea Fischer and Ochlert, Exp. Sci. du Travailleur 



et du Talisman, p. 13, pi. 1, figs. 2a-2M, 1891. 



Type locality. — Off Cape St. Vincent, in 57^ fathoms. Talisman 

 Expedition. 



This is a well marked species. In the Talisman report cited above 

 there seems to be a misprint in the table of dimensions on page 15, 

 36 and 35 mm. being printed for 26 and 25, respectively. 



HEMITHYRIS COLURNUS Hedlej. 



Hemithyris columns Hedley, Records of the Australian Museum, vol. 6, pt. 2, p. 44, 

 text figs. 7, 8, 1905. 



Type locality. — Off Cape Byron, in 111 fathoms, and east of 

 WoUongong, Australia, in 100 fathoms. 



This species is usually broadly dorsally uniplicate with the margin 

 of the plication a straight line, but in some specimens this line is 

 modified by three smaU but distinct minor plications, much as in 



