mazatla:s univalves 



207 



shells are known by their finely cancellated texture and deli- 

 cate reddish penciling ; and generally, by a white spot proceed- 

 ing from the apex postei'iorly bounded by red lines. In all 

 stages it is thin, and very glossy within. The largest specimen 

 measures long. 1"34, lat. I'OJ-, cdt. "33. 



Sal). — jMazatlan, jVIenke. — Do. ; not uncommon ; L'jaool Col. — 

 San Diego ; Lieut. Green. 



Tablet 981 contains 12 specimens, extremely yoimg, whitish. — 

 982, 8 sp. do. reddish. — 983, 4 sp. do. much compressed at the 

 sides ; but, as they agree in colour and markings, they are 

 probably only a variety. — 984, 5 sp. light margin ; scarcely 

 touched with penciling. — 985, 5 sp. do. very slight posterior 

 pencilings. — 986, 5 sp. do. margin fawn coloured. — 987, 5 sp. do. 

 greenish tinge. — 988, 4 do. purplish brown. — 989, '5 sp. pencil- 

 ings more distinct. — 990, 6 sp. with faint dots all rovmd. — 

 991, 8 sp. do. darker margin. — 992, 8 sp. do. still darker.— 

 993, 4 sp. do. very narrow margin. — 994, 3 sp. penciling regular ; 

 sUght and shaded. — 995, 4 sp. do. white border, penciling in 

 single rays. — 996, 8 sp. do. penciling fretted, rays distinct. — 

 997, 7 sp. do. margin coloured. — 998, 7 sp. penciling interlaced, 

 reddish margin. — 999, 7 sp. do. margin dark with penciling. — 

 1000, 9 sp. do.margin verj' dark, interior white. — 1001, 5 sp. do. 

 penciling visible within. — 1002, 3 sp. distorted growth. — 1003, 

 6 sp. shewing exterior, rayed. — 1004, 4 do. very sbghtly. — 1005, 

 3 do. uniform red.— 1(J06, 1 do. with light ring. — In aU 146 

 specimens, of which no two are exactly- aUke. 



265. ACMJZA PATIKA, EscJi. 



EschschoUz Zool. Atl. ed. Rathhe, 1831, p. 19, pi. 24, f. 7, 8.— 



Mid. Bui. Ac. St. Pet. vol. vi. no. 20 :—Sib. Reise, p. 187, 



pi. 16, f. 1 a-d, 2 a-c, 3. 

 + A. scutum. Esch. loc. cit. p. 19, pi. 23, f. 1 — 3; teste Mid. 



loc. cit. et Phil, in Zc-it.f. Mai. I»i6, p. 107.— ?UOrh. Voy. 



Am. Mer. p. 479 (excl. fig.) 

 = Patella mammillata, Nutt. in tTai/'s Cat. no. 2839: — Eve. 



Conch. Ic. pi. 42, f. 140, a, h. 

 + Patella tessellata, Nutt. in Jai/s Cat. no. 2885. 

 + Jun. Patella fenestrata, Nutt. in Jay's Cat, no. 2815. : — Eve. 



Conch. Ic. pi. 38, f. 121, a, h. 

 + Patella verriculata. Eve. Conch. Ic. pi. 31, f. 87, a, h. 

 + Patella cinis. Eve. Conch. Ic. pi. 24, f. 60, a, b, c. 



