314 Ruth D. Turner 



Dentalium (Episiphon) sowerbyi Guilding 

 Dentalium sowerbyi Guilding 1834, Trans. Linn. Soc. London 17, p. 35, pi. 3, fig. 7; Henderson 

 1920, Bull. U.S. Nat. Mus. No. Ill, p. 77, pi. 13, figs. 2-3, 10. 



Notes. L. A. BuRRY obtained this species at seven stations during his dredging off 

 Key Largo. It is a very small but characteristic and easily recognized species. 



Records. FLORIDA : off Beacon D, Key Largo in 66-90 fathoms (4 lots) ; off Carysfort Light, 

 Key Largo in 92 and 100 fathoms (2 lots); 3^ miles N.E. off Pacific Reef, Key Largo in 66 fathoms. 



Dentalium (Bathoxiphus) dldymum Watson 

 Dentalium didymum Watson 1879, J. Linn. Soc. London 14, p. 517; Watson 1885, Challenger 

 Rept. Zool. 15, p. 10. pi. 1, fig. 11; Henderson 1920, Bull. U.S. Nat. Mus. No. Ill, p. 83, pi. 14, 

 fig. 10. 



Notes. Dr. William J. Clench obtained a large series of Dentalium from the 



channel dredgings at Puerto Plata Harbor, Santo Domingo. Among them were a 



number of fragments and a few nearly complete specimens of this very rare species. 



They were taken from a fine grey mud brought up from a depth of 20 to 30 feet. A 



single specimen was found in a lot of Blake material from off Tortugas. 



Records. FLORIDA: Blake, station 43, from south of Dry Tortugas (N. Lat. 24° 08'; W. Long. 

 82° 15') in 33 fathoms. HISPANIOLA: Puerto Plata Harbor, Santo Domingo in 20 to 30 feet. 



Entalina platamodes Watson 



Siphodentalium platamodes Watson 1879, J. Linn. Soc. London 14, p. 519; Watson 1885, Challen- 

 ger Rept., Zool. 15, p. 13, pi. 2, fig. 4. 



Entalina platamodes Pilsbry and Sharp 1897, Manual of Conchology (1) 17, p. 133, pi. 23, fig. 

 3-5; Henderson 1920, Bull. U.S. Nat. Mus. No. ill, p. 87, pi. 15, figs. 1, 4, 5, 7. 



Entalina quadrata Henderson 1920, Bull. U.S. Nat. Mus. No. Ill, p. 88, pi. 15, figs. 2, 3, 6, 10. 



Notes. A lot of four specimens of this apparently rare species was taken by the 



Atlantis. Henderson records three specimens from two locaUties off the coast of 



Florida and his quadrata was repesented by a single specimen from off Grenada, 



Lesser Antilles. Emerson reported five lots from off Puerto Rico totaling some 200 



specimens which would indicate that in some localities at least they may be quite 



common. This is the first record for Cuba. 



Records. Atlantis, station 2989, off Puerto Sagua la Grande, Oriente (N. Lat. 23° 10'; W. Long. 

 80° 04) in 360 fathoms. 



Cadulus (Polyschides) tetraschistus Watson 



Siphodentalium letraschistum Watson 1879, J. Linn. Soc. London 14, p. 521; Watson 1885, 

 Challenger Rept. Zool. 15, p. 15, pi. 2, fig. 8. 



Cadulus {Polyschides) tetrachistus [sic] Watson, Henderson 1920, Bull. U. S. Nat. Mus. No. Ill, 

 p. 97, pi. 17, fig. 1. 



Notes. Two lots of this species are in the collection of the Museum of Comparative 



Zoology. I agree with Henderson that this South American species appears to be 



distinct from quadridentatus Dall. It is a sHghtly shorter, stouter species with a more 



soUd shell. The apical lobes are shorter with broader clefts between them. The shell 



surface has a slight chalky texture and is marked by distinct opaque white rings. In 



quadridentatus the shell is very shiny, a clear translucent blue-white, and in perfect 



specimens the apical lobes are long, straight sided and with very narrow clefts between 



them. The only other known record is from Fernando Noronha in 25 fathoms, 



collected by the Challenger. 



Records. URUGUAY: off Montevideo (S. Lat. 35° 12', 15"; W. Long. 55" 30') in 7 fathoms 

 {Hassler Exped.) ARGENTINA: Puerto Quequen, Buenos Aires. 



