49 
7 Moai” Laanitind 
3 Bk 
Volume 21. Number 7. July, LIL. Whole Nauher 1 
THE WEST AMERICAN SCIENTIST 
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21:0676 Lacuna porrecta Cpr., 1863. 848. 
Shell white, 6 mm long, diam. 5; spire not much elevated; 
whoris 3, convex; body whorl very slightly angulated; suture 
distinct, aperture ovate, lip effuse, umbilical chink large. Strait 
of Fuca to Monterey, Cal., on kelp. San Pedro, Cal. (Pleistocene). 
21:0677 Genus Acmazea Eschscholtz. 
Shell solid, patelliform; apex erect or anteriorly inclined. 
Animai with frilled muzzle, produced at the lower anterior cor- 
ners intc 2 lappets or tubercies; no marginal cordon, the cervical 
gill alone present. 
21:0678 Acmaea asmi Midd. 243. 
Maximum size 8 mm long, usually black, very elevated, and 
living chiciiy on species of Tegula, or other similar shells, or 
occasionally on small stones. 
21:0679 Acmaea mitra Esch. 239. 
Shell pure white, rather solid, smooth, elevated, about an 
inch long. Extreme low tide to deep water, not rare from Mon- 
terey to San Diego, Cal. 
21:0680 Acmaea triangularis Cpr. 
Apex nearly central, sides parallel, height half its length, in 
the specimen I have from Monterey, Cal.; apparently rare at San 
Diego. 
21:0681Acmeea triangularis orcutti Pilsbry. 
Description of this variety, from San Diego, Cal., collected 
some years ago, I have not seen, and have not coilected again. 
21:0682 Acmaea instabilis Gould, 1846 sub Patella. 613. 
