1863.] VANCOUVER ISLAND AND BRITISH COLUMBIA. 67 



3. Chemnitzia vANCOuvERENSis, Baird. 



Ch. testa elongato-turrita, cylindrica, longitudinaliter oblique 

 forte costata ; anfractibus novem, ultimo superne itidistincte 

 costato, infra Icevigato ; apertura parva, rotundato-ovata ; su- 

 turis impressis. 



Long. \ inch. 



Hab. Esquimau Harbour, Vancouver Island. {Mus. Brit.) 



"Taken from the crop of a Pin-tail Duck."— J. K. Lord. 



This shell is peculiarly ribbed. The eight upper whirls are strongly 

 and somewhat obliquely ribbed ; but on the last, which is the largest, 

 the ribs are indistinct on the upper half, and on the lower half dis- 

 appear altogether. The interstices between the ribs, which in the 

 penultimate whirl are about sixteen in number, appear smooth. The 

 sutures are deep and well marked. The mouth is rather small, and 

 is somewhat rounded-ovate. In consequence of its having been in 

 the crop of a duck, the surface of the shell is somewhat eroded, 

 and the apex is broken off. 



4. Amnicola hindsii, Baird. 



Am. testa retusa, solidula, viridi-olivacea, minute longitudinaliter 

 undulato-striata, transversim obscure lirata, apice erosa ; an- 

 fractibus quatuor, ultimo prope medium retuse-carinato, ad 

 suturas canalicidato, suturis impressis ; columella albida; aper- 

 tura ceerulescente. 

 Long., largest specimens, nearly | inch ; lat. rather more than ^ 

 inch. 



Hab. River Kootanie, and stream at the foot of the Rocky Moun- 

 tains, British Columbia. (Mus. Brit.) 



This species resembles somewhat the Paludina seminalis of Hinds, 

 but it differs in contour, being bluntly carina te round the middle of 

 the last whirl, and in being channeled round the suture. The surface 

 of the shell is distinctlj' marked with numerous flexuous striae, the 

 lines of growth, and near the sutures is rather indistinctly marked 

 with circular strise. I have named it after a good conchologist, who 

 has described several shells from the West Coast of America, and 

 who obtained the specimens of his shell from the Rio Sacramento, 

 California. 



5. BuLLiNA (Tornatina) eximia, Baird. 



B. testa cylindracea, viridi-lutescente, striata ; striis minutis, 

 confertis, unduLafis ; spira concava, excavata ; apertura longa, 

 <id basin effusa; labro acuto, columella prope basin subito 

 arcuata. 

 Long. \ inch. 



Hab. Esquimalt Harbour, Vancouver Island. {Mus. Brit.) 

 Two or three specimens of this pretty species of Bullina were 

 dredged, with the animals alive, in 1 2 fathoms water ; and several 

 others were taken out of the stomach of a Pin-tail Duck shot in the 

 harbour. The shell is cylindrical, and minutely striated with nume- 

 rous flexuous lines. The spire is very short and concavely excavated ; 



