356 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [May £0, 



Neither is the present species the Turritella interrupta of Totten 

 (as stated in ' British Conchology '), which I am now disposed, from 

 specimens and further information, to refer to the following species. 



u 33. Odostomia rufa, Philippi. 



Melania (afterwards Chemnitzia) rufa, Phil. Moll. Sic. i. p. 156. 

 t. ix. f. 7. 



O. rufa, B. C. iv. p. 162 ; v. p. 213, pi. lxxvi. f. 1, and var. 2. 



' Porcupine' Exp. 1869 : St. 13, 14, 18, North Channel. 1870 : 

 Atl. 3a, 9, 13,24, 27, 28, (and var. fulvocincta). Var. densicostatu 

 {Chemnitzia densicostata, Ph. Moll. Sic. ii. p. 137, t. xxiv. f. 9), 

 1870: Atl. 3, Setubal B., 24, 29, 30 ; Med. Adventure Bank. 



Distribution. Typ. Anglesea to Cornwall, Atlantic coasts of France 

 and Portugal, Mediterranean and Adriatic, Madeira and Canaries, 

 New Brunswick, Massachusetts, New England, and North Carolina ; 

 0-365 fms. 



Var. fulvocincta, Lofoten I, to the Dogger Bank and Ireland, 

 Brittany (Cailliaud), Tuscany {Jppelius)\ ; 18-60 fms. Var. 

 densicostata. Gulf of Gascony, Mediterranean and Adriatic, off 

 Culebra, St. Thomas ('Challenger' Exp.) ; 30-390 fms. 



Fossil. Pliocene : Coralline Crag, Biot, and Italy ; var. fulvo- 

 cincta, Lombardy (coll. Brocchi) ! Post-tertiary: va.r.fulvo-cincta. 

 Norway, Selsea ; 0-80 ft. Yar. densicostata, Sicily {Brugnone). 



Further examination and comparison of the typical form and its 

 varieties with Turritella interrupta of Totten, which is common on 

 the eastern coasts of North America, as well as my own dredging off 

 Massachusetts, since the publication of ' British Conchology ' (when 

 I referred that species to O. scalaris), have satisfied me that it is 

 the same species as O. rufa and not O. scalaris. The figure in 

 Gould's work is incorrect and misleading. Totten's specific name is 

 prior to that of Philippi, and therefore ought to be adopted. I 

 believe that Turbonilla rathbuni of Verrill aud Smith is a pretty and 

 deep-water form of the present variable species. 



The variety densicostata is much smaller, narrower, and more 

 slender than the typical form, and is sometimes banded like the 

 variety fulvocincta. The ribs appear to be more crowded, because 

 the shell is narrower, and they differ in the degree of obliquity. 

 Specimens from Station 3 of the ' Porcupine ' Expedition of 

 1 870 and from Corsica are intermediate in every respect between the 

 typical form and the variety densicostata. 



34. Odostomia striattjla, Linne. 



Turbo striatulus, L. S. N. p. 1238. 



Turritella potamoides, Cantraine, Mai. Med. pi. vi. p. 25. 



* Porcupine' Exp. 1870 : Med. St. 55, Benzert Road, G. Tunis, 

 Adventure Bank. 



Distribution. Throughout the Mediterranean and Adriatic ; 0-120 

 fins. 



Fossil, riioccnc : Coralline Crag, Biot, Italy, Ehodcs, 



