94 



BULLETIN 111, UNITED STATES NATIONAL MUSEUM. 



1880. 



1882. 



1884. 



SIPHONODENTALIUM (PULSELLUM) BUSHI, new species. 



Plate 16, fig. 6. 



Siphoentalis nffinis, Verrill, Proc. U. S. Nat. Mus., vol. 3, p. 395. (not of 



Sars). 

 Siphoentalis affinis, Verrill, Trans. Conn. Acad. Arts and Sci., vol. 5, pt. 2, 



p. 558, pi. 42 fig. 20 (a) (6) (not of Sars). 

 Siphoentalis affinis, Verrill, Report Com. of Fish and Fisheries for 1883, 

 p. 573, in part. 

 1884. Siphoentalis affinis, Bush Report Com. of Fish and Fisheries for 1883, p. 717, 



in part. 

 1897. Siphonodentalium {Pulsellum) ajffine, Pilsbry and Sharp, Tryon's Man. 

 Conch., vol. 17, p. 140. 



The shell is fairly strongly curved, regularly tapering, thin, fragile, 

 with a large posterior aperture and round section. It is translucent, 

 white, smooth but not shining. No sculpture is present, nor are there 

 any apical features to be observed in museum specimens. Professor 

 Verrill indicated ''one slight notch." 



The type, Cat. No. 76723, U.S.N.M., measures— length, 5mm.; di- 

 ameter, 0.75 mm.; arc, 0.15. It was dredged by the Albatross at 

 U. S. Bureau of Fisheries Station 2710 in 984 fathoms, bottom of 

 green mud. 



This differs from Sijjlionodentalium teres in its greater degree of curv- 

 ature and the rate of increase in diameter. It is larger than S. lofo- 

 tense, stouter than S. (iffine, and is very much larger and more curved 

 than is S. occidentale. 



As to the generally accepted identity of this with S. ajfine Sars, see 

 remarks under last species (S. occidentale). 



There are 12 lots in the museum collection, all dredged at Bureau 

 of Fisheries stations off Marthas Vineyard, Georges Bank, Delaware, 

 and Hatteras, in from 319 to 1,290 fathoms. It is a northern cold 

 water species, of a depth zone ranging from the lower continental 

 slope to the ocean floor. 



The following are the museum lots: 



Num- 

 ber of 

 speci- 

 mens. 



Cat. No. 

 U.S.N.M. 



Locality. 



Remarks. 



38071 

 61145 

 38090 

 52307 

 52313 

 38700 

 76722 

 38699 

 78395 

 76662 

 76723 

 35718 



Off Georges Bank, U. S. F. C. Station 2078 



do 



Off Marthas Vineyard, U. S. F. C. Station 894 . 

 Off Marthas Vineyard, U. S. F. C. Station 2574 

 Off Marthas Vineyard, U. S, F. C. Station 2584 

 Off Marthas Vineyard, U. S. F. C. Station 2213 

 Off Marthas Vineyard, U. S. F. C. Station 917 . 

 Off Nantucket Shoals, U. S. F. C. Station 2203 



Off Block Island, U. S. F. C. Station 2689 



Off Delaware, U. S. F. C. Station 2233 



Off New Jersey, U. S. F. C. Station 2710 



Off Cape Hatteras, U. S. F. C. Station 2110 



499 fms., 40°, gy. m. s. 



Do. 

 365 fms., 40°, sft. br. m. 

 390 fms., 40°, gr. m. 

 541 fms., 40°, gy. m. 

 384 fms., 39.5°, gr. m. 

 319 fms., 44°, s. m. 

 705 fms., 38.9°, gr. m. s. 

 525 fms., gr. m. 

 630 fms., 29.2°, gr. m. 

 984 fms., gr. m. (type lot). 

 516 fms., 40°, br. m. 



