38 ACM^A. 



Bermnda and Key Wed, Florida, south to Guadeloupe and Vera 

 Cruz, Mexico. 



Patella punctidata Gmelin, S3'st. Nat. xiii, p. 3705, no. 68, and 

 again p. 3717, no. 132. — .? P. punctata Lam., An. s. Vert, vi, p. 333, 

 no. 34. — P. puncturata Lam., 1. c, p. 333, no. 35. — Rve, Conch Icon., 

 f. 122 a, b. — Patella pustulata Helbling, Beitriige zur Kenntniss 

 neuer imd seltener Conchylien, in Abhandlungen einer Privatgesell- 

 schaft in Boliraen zur Aufnabme der Matbematik, der Vaterliind- 

 iscben Gescbicbte und der Naturgescbicbte, vi, p. 110, t. 1, f. 12, 

 Prag, 1779. — Gmelin, Syst. Nat. xiii, p. 3720, no. 147. — Aeango, 

 Fauna Mai. Cubana, p. 230. — Patella cubaniana Orb., Moll. Cuba 

 ii, p. 199, t. 25, f. 4-6. — P. confuna and P. pulcherrima Guilding. 



A very variable sbell, but easily known from its West Indian fel- 

 lows. There are sometimes delicate raised laminse in the direction 

 of growth lines, making wide low scales over the ribs. The young 

 are almost always high and conical, very different from the depressed 

 adult form. A frequent variation is illustrated by fig. 5, represent- 

 ing a convex, dome-shaped variety. Specimens from Key West, 

 Fla., are small, thin, and narrower than most from the Islands ; they 

 form the var. pulcherrima Guild., of authors. The Bermuda speci- 

 mens are small and conical. 



Figs. 11-13 represent the cubaniana of Orbigny. 



A. candeana Orbigny. PI. 5, figs. 91, 92, 93, 94, 95. 



Shell ovate, depressed, the apex in front of the middle, slopes 

 genily convex ; surface finely, regularly striated radiately ; gray or 

 dull buff, with radiating black lines, often gathered into 7 to 9 

 broad rays. 



Inside white (or brown tinted), with a wide translucent-gray 

 border usually closely articulated with brown lines; central area 

 generally brown or brown and white marbled. 



Length 25, breadth 21, alt. 8 mill. 



Bahamas and West Florida to Tobago, West Indies. 



P. Candeana Orb., Moll. Cuba ii, p. 199, t. 25, f. 1-3.~J. can- 

 deana Dale, Cat. Mar. Moll. s.-e. U. S. p. 156. — Patella tenera 

 C. B. Ad., Synopsis Conchyliorum Jamaicensium, etc., in Proc. 

 Bost. Soc. N. H. ii, p. 8, 1845.— Rve. Conch. Icon, f 104. — Patella 

 {Acmcea'^) elegans Phil., Abbild. iii, p. 34 (Patella p. 6, t. 2, f. 2.) 



More finely and regularly striated than A. punctidata, the apex 

 less erect, more autei'ior. The color-pattern also is quite different. 



