54 NORMAN : ON THE MOLLUSCA OF BERGEN FIORDS. 



consider it a variety — in having a distinct well-marked keel 

 running round the centre of the whorls. 



177. Aciis ventrosa, Jeff., var. minor, Friele. 



Adis ventrosa var. minor, Friele. Bidrag til Vestlandets 

 Molluskfauna (in Chr. Videns-Selsk. Forhand., 1875), p. 61, 

 pi. i., fig. 7b. 



Very rare; off Bornestangen in Sartoro, 15 — 40 f. 



188. Odostomia albella, (Love'n). Living under stones be- 

 tween tidemarks at Bukken, in company with Rissoa cingellus 

 and Hydrobia ulviz var. Barleei. 



189. Odostomia minima, Jeffreys. A single specimen of this 

 minute but very distinct Odostomia in 180 f, Kors Fiord; 

 new to the Norwegian Fauna. 



200. Natica affmis, (Gmelin). 



Nerita affinis, Gmelin. Lin. Syst. Nat., ed. xiii., p. 3675. 

 Natica affinis, Jeffreys. Brit. Conchol., v., p. 215, pi. cii., 



fig- 3- 



Bergen Fiord; off Bornestangen, and Llaakelsund, and 

 at the entrance to Fane Fiord, 4 — 200 f. 



201. Natica Island ica, (Gmel.) One young specimen at 

 Station 19. 



206. Aporrhais Serresianus, (Michaud). 



RostcUaria Serresia?ia, Michaud. Bull. Soc. Linn. Bord., 

 ii., 1828, p. 120, fig. 3 — 4. 



Chenopus Serresiana, Phil. Enum. Moll. Sic, ii., 1844, 

 p. 185, pi. xxvi., fig. 6, 



The Aporrhais pes-carhnis, F. & H. {=A. McAndrecB, 

 Jeffreys) is nothing more than a dwarf form of this shell. 

 But the specimens which I dredged at Station 17 do not 

 belong to that dwarf (Shetland) form but are the true Serre- 

 siamis, and correspond exactly with the specimens taken by 

 the 'Porcupine'' Expedition in 1869, off Valentia, 100 f. 



J.C; il., Feb., 1879 



