232 RETUSA. 



Cylichna obesiuscula BRI N-M , Bull. Soc. Mai. Ital., Ill, p. 39, 



pi. i, fur- 7, 1877. Di<ij>li<(n<i n.nuln* VKRRILL, Proc. U. S.Nat. 



II!, p. 382, 1880; Trans. Conn. Acad., V, p. 543, pi. Iviii, fig. 



25,1882; VI, p. 273, 1884. Retusa f obesiuscula Brugn., DALL, 



Blake Gastr., p. 49. 



Pliocene of Messina, (Seguenza) ; of Palermo (Brugnone) ; U. S. 

 I < turn Stations 870, 949, 2595, 2602 and 2614, in 63-168 



fms., living in about 100 fms. 



This species is quite distinct from Sulla conica or conulus of De- 

 shayes, Wood, Sars, etc., from C. hcernesi and C. ovata, with all of 

 which it has been confounded by various authors, especially Jeffreys. 

 Professor Verrill in referring to it noted the discrepancies. (Dall). 



R. OVATA Jeffreys. PI. 30, fig. 11. 



" Larger (than Cylichna umbilicata) narrower at the apex, and 

 conical ; the upper angle of the outer lip is higher and more pro- 

 jecting " (Jeffr.). 



Cylichna ovata JEFFREYS, Rep. Brit. Assoc., 1870, Pore. Exp., p. 

 156; Ann. Mag. Nat. Hist., 5th ser., X, p. 34, 1882. WATSON, 

 Chall. Rep., p. 664, pi. xlix, fig. 9, ISSd. Utriculus conulus G. O. 

 SARS, Moll. Reg. Arct. Norv., p. 287, pi. 17, fig. 17, l&7S. Cylichn,i 

 umbilicata var. conulus Jeffr., Brit. Conch., IV, p. 414; V, p. 223. 

 Not Bulla conulus Deshayes, Cylichna conulu* of Weinkauff, or 

 Bulla conulus of Searles Wood. Retusa f ovata DALL, Blake 

 <;a--tr. f p. 49. 



North Atlantic (Porcupine and Triton Expeditions); Bay of 

 Biscay (Travailleur Expedition) ; Azo res (Josephine, Porcupine and 

 Challenger Expeditions); Went Indies] off Pernambuco (Challen- 

 ger Expedition); Straits of Floii'l", lo()-4<;:> fms. (Dr. Rush); 

 East Coast of North America, 124-400 fms. (U. S. Fish Commis- 

 sion) ; range 100-1000 fms. over a muddy bottom in all parts of 

 the North Atlantic, with temperatures from 40 to 62 F. 



R. C.ELATA Bush. PI. 23, fig. 69. 



Shell rather thick, opaque white, with a slightly lustrous surface 

 <>f moderate size, somewhat conical in shape, with a truncated tip 

 and an elongated tapering base. Spire concealed within ;i vrry 

 deep pit; the two or three whorls are distinctly visible in an i-nd 

 vit \\ and are crossed by numerous delicate, little curved riblets 

 which curve over the top of the body-whorl extrmliiiL: down a short 

 distance, and gradually blend with the flexuous lines of growth. 



