SIPHONODENTALIUM. 139 



ture nearly three times the width of apical orifice. Length as much 

 as 6 mill. (G. 0. Bars'). 



Lofoten 2s. and other places from Christiania fjord to Haswig in 

 Finmark, 30-300 fms. (Sars and others) ; Hebrides and Shetland, 

 40-140 fms. (Jeffreys) ; Clyde district and Lismore (Chaster and 

 Heath cote) ; West of Ireland in 90-1630 fms. ; Bay of Biscay, 227- 

 1095 fms. ; Vigo Bay, 20 fms. (Porcupine Exped.) ; Gulf of Gas- 

 cony, 60-80 fms. (Folin) ; Mediterranean and jEgean Seas, 50-1 456 

 fms. (Porcupine, Acton, Spratt, Monts.) ; Off New England, 500 

 fms. (Verrill) ; Pliocene of Calabria and Sicily. 



Siphonodentalium lofotense M. SARS, Forh. Vid. Selsk. Christiania, 

 1864, p. 29, pi. 6, f. 29-33 (1865). JEFFREYS, Nature, i, p. 135; 

 Ann. Mag. Nat. Hist. (3), xx, p. 250 (1867) ; (4), ii, pp. 299, 301 

 (1868) ; v, p. 442 (1870) ; vi, p. 74 (1870) ; Brit. Conch., v, 195, 

 pi. 101, f. 2 ; Proc. Roy. Soc. Lond., xxv, p. 199. 



Siphodentalium lofotense Sars, JEFFREYS, Ann. Mag. N. H. (4), 

 xix, p. 156 (1877) ; (5), vi, p. 317 (1880) ; xi, p. 395 (1883) ; P. Z. 

 S., 1882, p. 662. Siphonodentalium lofotensis Sars, ARADAS & BEN- 

 OIT, Conch. Viv. Mar. Sicilia, p. 118 (1870). Siphonentalis lofo- 

 tensis M. Sars, G. O. SARS, Moll. Reg. Arct. Norv., p. 104, pi. 20, f. 

 lla-6; pi. I, f. 3, (1878). VERRILL, Proc. U. S. Nat. Mus., iii, p. 

 395 ; Amer. Journ. Sci., xx, 1880, p. 392 ; Trans. Conn. Acad. Sci., 

 v, p. 558. Pulsellum lofotense Sars, CHASTER & HEATHCOTE, 

 Journ. of Conch., vii, p. 304. 



Specimens from the Bay of Biscay and the Mediterranean are 

 usually much smaller than those from more northern seas. (Jef- 

 freys}. 



Jeffreys remarks : " The shell may easily be passed (as it was by 

 me) for the young Dentalium entalis ; but it is more curved and 

 cylindrical, the mouth and corresponding lines of growth slope back- 

 wards, and the margin of the posterior orifice is regularly jagged 

 (having two slight notches on each side), and this extremity does 

 not form a bulbous point in the fry. One of the characters given by 

 Sars (" margine aperturse posterioris integro") should be 'amended. 

 My observation of the animal agreed with his, except that- the foot 

 is vermiform and has a fine point, the disk being expanded and 

 assuming the shape of a flower only when the Siphonodentalium 

 wishes to obtain a fulcrum and keep its place in the sand. The foot 

 of Nucula and Leda is somewhat similar, its disk when expanded 

 resembling the leaf of a palm." 



