334 Dr. Gwyn JcftVeys on 



The distribution of this species and its varieties is very ex- 

 tensive, from Spitzbergen to the, Adriatic, and all along the 

 eastern coasts of North America from Wellington Channel to 

 Cape Cod. Its habitat ranges from low-water mark to 114 

 fathoms, and it especially frequents brackish water. Fossil in 

 the Norwich Crag, and in the newer Tertiaries of Scandinavia, 

 Great Britain, and Germany. 



The shell varies remarkably in length and constriction, as 

 well as in the extension or prominence of the spire ; but speci- 

 mens from various localities are found to pass one into another. 

 The arctic, North-American, and Norwegian form {Bulla 

 pertenuis of Mighels) is smaller, shorter, broader, and more 

 cylindrical than our estuarine and typical form. The Bulla 

 turrita of Moller closely resembles and corresponds with the 

 variety of the present species which I described and figured 

 as Lajonkaireana. Writers on British shells formerly gave 

 several other names, which may now be considered obsolete. 

 Brusina described a small variety, having a depressed spire, 

 from Dalmatia, as Cylichna leptoneilema. 



A small fragment of another species occurred at Station 12, 

 1450 fathoms. It consists of the anterior portion of a short 

 cylindrical shell, which is of a milk-wliite colour, glossy, and 

 marked with slight and rather distant spiral strioe or rather 

 impressed lines ; the sculpture docs not extend to the crown ; 

 the apex is semiglobose, and sunk within a sharp obliquely 

 encircling ridge. The species may be called lacteus. I also 

 dredged a young specimen of this species in the ' Porcupine ' 

 Expedition of 1869, off the west coast of Ireland, at a depth 

 of 1443 fathoms. 



Utriculus substriatus *, JefFr. 



Shell represented by a single specimen, which was unfor- 

 tunately broken in sifting the dredged material. It resembles 

 Bulla hyemalis, Coi\t\ioiiy, = Amj)/nsj9hyra globosa, Loven,= 

 Utriculojysis vitrea^ M. Sars, except in being smaller, shorter, 

 and equally broad throughout, instead of barrel- shaped; the 

 crown is consequently longer in proportion, and not so much 

 raised at the point ; but the especial difference consists in this 

 being beautifully sculptured, and not smooth like the other 

 species ; besides a few coarse spiral ridges the whole surface 

 is closely and microscopically striated in the same direction. 

 L. 0-1. B. 0075. 



Station 9, 1750 fms. 



* Somewhat striated. 



