1884.] 'LIGHTNING* AND ' PORCUPINE EXPEDITIONS. 353 



Distribution. Oxfjord and Finmark to the Mediterranean and 

 Adriatic ; 8-40 fms. 



Fossil. Pliocene : Leghorn and Monte Mario. Post-tertiary : 

 Norway, W. Scotland, and Portrush ; 3-460 ft. 



A few obsolete synonyms. 



As to the specific name spiralis, Monterosato says " poco coretta- 

 mente da alcuni spinalis." Neither word is Latin, much less 

 classical ; spirula would be better. 



; 26. Odostomia interstincta, Montagu. 



Turbo interstinctus, Mont. Test. Br. (ii.) p. 324, t. 12. f. 10. 



O. interstincta, B. C. iv. p. 151 ; v. p. 213, pi. lxxv. f. 2. 



'Lightning' Exp. St. 4. 



' Porcupine ' Exp. 18/0 : Atl. C. Sagres (var. multicostata), 2(i 

 (var. suturalis), Tangier B. (typical) ; Med. 50, Benzert Road, 

 Basel Amoush (typ. and var. suturalis, from the last three stations). 



Distribution. Lofoten Isles and the western and southern coasts 

 of Norway to the Mediterranean and Adriatic, Canaries and Madeira ; 

 3-310 fms. 



Fossil. Miocene : Vienna Basin (Homes), and Adour (Grate- 

 loup). Pliocene : Coralline and Red Crag, Pisa (Manzoni), Siena 

 (de Stefani and Pantanelli), Monte Mario (Rigacct), Sicily (Philippi 

 and others). Post-tertiary : Norway, West Cheshire, and Selsea ; 

 8-240 ft. 



The principal synonyms for varieties are Chemnitzia terebellum, 

 Rissoa gracilis and R. suturalis of Philippi, and 0. moulinsiana of 

 Fischer. 



This abundant and widely diffused species is of course extremely 

 ^variable, and especially with respect to dimensions and the number 

 of ribs. Other naturalists must exercise their own judgment as to 

 considering O. terebellum or moulinsiana and 0. suturalis alias 

 emaciata or sylvestri or penchinati, as well as other forms described 

 as species, distinct and not mere varieties. I would not have united 

 them with the typical form, if it had not been for the examination 

 and comparison of an immense number of intermediate specimens 

 from different localities. 



The variety multicostata may be distinguished from the typical 

 form and auy of the recorded varieties and so-called species by 

 having the shape of a short cone and much more numerous and 

 straight ribs. 



27. Odostomia jeffreysi, Bucquoy, Dautzenberg, and Dollfus. 



O. jefreysi, Bucq., Dautz., and Dollf. Moll. mar. Roussillon, 

 Fasc. 4, 1883, p. 170, pi. 20. f. 10 ; x&t.Jtexicosta. 



'Porcupine' Exp. 1870: Atl. St. 26-34; Med. 50, Adventure 

 Bank. 



Distribution. Gulf of Lyons to the Archipelago ; 60-600 fms. 



This seems to differ from any of the numerous varieties of O. inter- 

 stincta in its comparatively minute size, oval shape, and having 



