[TAYLOR] MARINE MOLLUSCA 79 
MESALIA, Gray. 
271. MESALIA RETICULATA, Mighels and Adams, sp. 
Turritella reticulata, M.& A., Proc. Bost. Soc. Nat. Hist., vol. i., p. 50 (November, 1841): 
and Bost. Jour. Nat. Hist., vol. iv., no. 1, p. 50, pl. iv., fig. 19 (January, 1842). 
= 1! lactea, Moller (1842). 
= M. lacteola, Cpr. (1864). 
A very common shell in sand in ten to thirty fathoms. It has been 
dredged in nearly all the localities where dredging has been carried on, 
from Victoria to the Queen Charlotte Islands. 
LITTORINA, Ferussac. 
272. LITTORINA SITCHANA, Philippi. 
Proc. Zool. Soc. London, 1845, p. 140. 
This shell is most probably only a form of the Atlantic Z. rudis, 
and if so has an extensive range and also a very extensive synonymy. 
Tt is an abundant and variable littoral shell occurring throughout 
our province. 
273. LITTORINA SCUTULATA, Gould. 
Proc. Bost. Soc. Nat. Hist., vol. iii., p. 83 (March, 1849); and U. S. Expl. Exped., 
Mollusca, p. 200, figs. 241, 241a@ (1852). 
Quite as abundant as L. sitchana, and occurring with it on all our 
coasts. 
LACUNA, Turton. 
274. Lacuna vincrA, Montagu, sp. 
Turbo vincta, Mont., Test. Brit., p. 308 (1803). 
= carinata, Gould. 
= solidula. Loven. ‘ 
= divaricata, O. Fab. x NU 
vars. = effusa, exæquata and porrecta, Cpr. Soe ee. eee 

This is a very variable shell occurring on Zostera at low water on 
all our coasts. 
275. LACUNA VARIEGATA, Carpenter. 
Rept. Brit. Assoc., 1863, p. 656 (August, 1864); and Ann. Mag. Nat. Hist., series 3, 
vol. xiv., p. 428 (December, 1864). 
This species occurs with the last named at Victoria and Saanich, 
but is not so common as is L. vincta. 
L. variegata has not been noticed so far in other parts of the pro- 
vince, though no doubt it will be found when more carefully looked for. 
