48 
Transactions of the 
Hah, sand near higli-water mark. Has very large mouth ; 
apparently feeds on animal matter contained in the sand, which 
abounds with live foraminifera, as I found the intestines full of it. 
Operculum horny, subspiral ; shell snail-shaped, one or two dark 
brown stripes. Palate consisting of rows of simple sickle-shaped 
teeth, altogether different from any marine form I have seen. 
Specimen in cabinet of R. M. S. 
CEMTHiADiE. Cerithium, No. 7. — Hab., sand, generally partially 
imbedded, between tide marks, nearer high than low water. Rare. 
Operculum horny, multispiral. 
Palate, 3. 1 .3. Median reflexed; central denticulation much the 
longest. 1st lateral with slightly rounded claw, edges partially 
reflexed and finely denticulated ; 2nd and 3rd, edges reflexed, 
denticulated. Specimen in cabinet of R. M. S. 
Cerithium (?), No. 10. — Shell granulated. Hab., stream on 
sand, nearer high-water mark than low. Operculum horny, multi- 
spiral. 
Palate, 3.1.3. Median reflexed. Five denticulations, central 
longest ; base articulated. Laterals, edges reflexed, denticulated. 
Specimen in cabinet of R. M. S. 
Tubritellhae. Turritella (?), No. 41. — This is smaller than 
the last described. It has not a canal ; peristome entire, longitu- 
dinally furrowed. Hab., sand between tide marks. 
Palate, 3.1.3. Median reflexed ; three denticulations, not 
articulated. Laterals reflexed, denticulated. 
Vermetns, No. 22. — Only found one specimen, in the root of a 
large mass of kelp, but have lost it, so cannot describe it at all. 
Palate, 3.1.3. Median reflexed, denticulated, central one very 
long. 1st lateral, long tooth at end, lower edge denticulated. 
2nd lateral tooth-shaped, slightly denticulated. 3rd similar, but 
not denticulated. 
Littorinidze. Littorina, No. 52. — Shell smooth, generally 
corroded ; lip slightly everted. Hab., between tide marks at 
Scknapper Point ; operculum horny, paucispiral. 
Palate, 3.1.3. Median reflexed, central denticulation truncated. 
1st and 2nd laterals, upper edges reflexed and denticulated ; 3rd 
has much longer comb-like denticulations. 
Bisella, No. 4. — Shell with irregular keels more or less de- 
veloped. Hab., between tide marks, nearer high than low water. 
This is the common dog periwinkle, so called from not being 
edible : it is carnivorous. Operculum paucispiral. 
Palate, 3.1.3, very long. Median reflexed, with broad, central 
denticulations. Laterals reflexed. Specimen in cabinet of R. M. S. 
