MAZATLAN tlNIVAlVES 209 



=A. scutum D'Orh. loe. cit. pi. 64, f. 8 — 10, escl. diagn. (teste 



Mid.) 

 ? = Lottia punctata, Gm?/ ; (uon Quoy Sf Oaim.) teste Mid. 

 — V. Oregona, Nutt. in. Jay's Cat. no. 2853: — Rve. Conch. Ia 



pi. 36, f. 112, a, h. 

 + P.umbonata, Nutt. loe. cit. no. 2887 : — Rve. loc. cit. pi. 35, 



f. 107, ah. 

 + P. pilQata, Nutt. loc. cit. no. 2861. 



This species is known by its comparatively smaU size, com- 

 pressed sides, and recurved apex. The front part is sometimes 

 covered with stout, rounded ribs, sometimes with a very few 

 fine and separate ones, and sometimes nearly smooth. It is 

 either uniform in tint, or is minutely spotted outside ; inside 

 white and blackish brown. The solitary Mazatlan specimen 

 has broad, rounded ribs, and a somewhat shagreened surface ; 

 and measures long. "96, lat. "8, alt. *42. 



JZaJ.— Sitcha, Eschscholtz. — Mouth of Columbia Eiver, Nut- 

 tall. — Sta Barbara, Col. Jeioett. — San Diego, Lieut. Green. — 

 Mazatlan ; 1 fresh sp. ; L'pool Col. 



Tablet 1008 contaias the specimen. 



267. ACMJEA SCABEA, Nutt. 



Jays Cat. no. 2ml.—Rve. Conch. Ic. sp. 119, pi. 37, f. 119, a, h. 

 Non Patella (Lottia) scabra Gould Exp. Shells, p. 10 : — 



= Patella spectrum, Nutt. in Jays Cat. no. 2877 -.—Rve. loc. 



cit. pi. 29, f. 76, a, h. 



Although the name of Gould was published with description 

 before that of Nuttall, yet I have presumed upon the known 

 courtesy of Dr. Gould, in order to avoid re-naming a species 

 which has been widely distributed in collections, and which 

 (as well as Dr. Gould's A. scabra, under the name of P. spec- 

 trum) has been figured in the Couch. Ic. This shell occurred un- 

 named in Dr. Gould's collections. It frequents the temperate 

 portion of the coast, and is easily recognized by its light flesh 

 colour, and tubercular rasp-like surface. Long. VOQ, lat. "9, 

 alt. '4. 



SisfS.— California, iV^^/a/Z.— Monterey and Sta Barbara, Col. 

 Jeivett. — Mazatlan ; 1 sp. only ; Lpool Col.—S. W. Mexico ; 

 1 ep. P. P. C. 



Tablet 1009 contains the specimen. 



