some new and peculiar MuUusca. 333 



and Canada. Caj)tain Feilden t'oiind it in the recent Arctic 

 Hxpfilitiun, in a raiseil sea-ljed in Kane V^alley, in S2° .'33' north 

 hititude. P. Trevelyana has a narrower base, and is thcrctore 

 more fusiform than P. ea:arata ; and the spire is shorter than 

 that of P. ttirricula, which gives the ])resent species a more 

 oval shape. It is the P. reticulata of Brown (1827), and P. 

 (lecussatu)u of ^lacgillivray. Brown's name has priority of 

 all the others, but may be regarded as obsolete. 



Bnllids. 



Cylichna alba, Brown. 



Volvaria alba, 13ro^^^l, 111. Conch. G. B. & I. pi. xx.wiii. f. 43, 44 

 (18l>7). 



Station 1, 175 fnis. ; 4, 20 fms. ; 6, 410 fms. (living) ; 

 Holsteinborg, 12 fm.s. 'Lightning' Expedition, 189 and 

 530 fms. Swedish Arctic Expedition, 1868, 1400 fms. ! ' Por- 

 cupine ' Expedition, 1869, west coast of Ireland, 420-1366 fms. 

 (living at the last-mentioned depth) : 1870, Bay of Biscay, 

 795-994 fms. ' Challenger ' Expedition, off the Azores, 450 

 and 1000 fms. Norwegian Arctic Expedition, 1876, 1 180 fms. ! 

 From Cape York to Cape Cod, and fr<jni Spitzbergen and 

 Novaya Zemlya to Shetland, at depths of from 7 to 300 fathoms. 

 West coast of North America (P. Carpenter). North Japan, 

 35-48 fms. (St. John) ! Fossil in the Norwich Ci*ag, the older 

 Pliocene of Sicily, and the newer Tertiaries of Great Britain, 

 Scandinavia, and N.E. America; Arctic Expedition, 1875-6, 

 Kane Valley, 82° 33' north latitude (Feilden) ! 



I mention this common arctic species to show the range of 

 hydrographical distribution and depth. In some specimens 

 the crown is more or less truncated ; and in others the minute 

 and close-set spiral striaj are absent. 



It is the Bulla trificea of Couthouy, B. corticata of Moller, 

 and C. nucleola of Reeve. 



Utriculus obtusuSj Montagu. 



BitUa obtu-^a, Mont. Test. Brit. (Ij, p. 22.3, t. 7. f. 3 (1803). 

 Var. turrita. Bulla turrita, Moll. Ind. Moll. Groenl. p. G. 



Body milk-white, semitransparent, covered with microscopic 

 tubercles: head snout-shaped, prominent, • being of the same 

 breadth as tiie foot in front, so as to appear united with it : 

 tentacles triangular and broad, separated by the head-Hap : eyes, 

 none perceptible : foot large, wedge-shaped in front ana cloven 

 behind. 



Godhavn, 5-20 fms. ; Station 5, 57 fms. ; Holsteinborg, 

 10 fms. 



