MAZATLAN BIVALVES 35 
54. TELLINA PUNICEA, Born. 
Test. Mus. Ces. Vind. p. 33, pl. 2, f. 2.— Dorset Cat. p. 30, pl. 7, 
f.5.—Linn. Trans. vol. 8, p.50.— Brit. Mar. Conch. p. 66.— 
Brown Illustr. Conch. Gr. Br. p. 100.—Gmel. Syst. Nat. 
p. 3239.— Wood, Ind. Conch. p. 20, no. 47.—Dillw. Deser. 
Cat. p. 90.—Lam. ed. Desh. vol. 6, p. 196.—Schroeter Fini. 
t. 3. p. 22, no. 79.—Desh. Enc. Meth. vers. t.3, p. 1011. no. 12.— 
Hanl. in Sow. Thes. Conch. vol. 1. p. 239, pl. 58, f. 89, and 
pl. 60, f. 154—B. M. Cat. Moll. D’ Orb. p. 61, no. 433.— 
Forbes § Hanl. Br. Moil. vol. 1, p. 314. 
=Donax Martinicensis, Lam. teste Gray. 
=Tellina alternata, Sow. teste Gray. 
= , angulosa, Gime/. teste Desh. 
= ,, simulans, C. B. Ad. Pan. Shells, p. 284. 
?=striata, Chemn. Conch. t. 10, tab. 170, f. 1654-5 ; teste 
Dillwyn § Desh. : non Forbes & Hanley, Br. Moil., nec 
Hanl. i Thes. ° 
The late respected and very accurate Prof. Adams made his 
T. simulans out of a valve he found of this species on what was 
(to him) the wrong coast. Unfortunately for his theory, the 
very slight differences he relied on (deeper furrows continued 
over the flexure, interspaces less flattened, and lateral teeth 
nearly obsolete) are not constant in the Pacific waters: and if 
one shell is common to the two oceans, which he is obliged to 
allow in the case of Crepidula unguiformis, why may not this 
be? The shell is known at once by its regular Tellinides shape, 
solid texture, pink colour variously banded with white, and 
deeply channelled furrows, some of which generally coalesce 
on one side before they reach the flexure. The angle of the 
ligamental area is more or less developed: the passage of the 
sulcations over the fold varies not only in different specimens, 
but in the same shell, in the opposite valves, or from young to 
old. The closeness and flattening of the ribs, the colour and 
the size of the lateral teeth also vary considerably, though I 
have only had an opportunity of examining about 40 specimens. 
Long.1'15, lat.1°9, alt. °47. 
Hab.—([Coasts of Britain, Pulteney, Wood, &&¢|—‘‘A West 
Indian Shell, introduced into our Fauna through having 
been figured in the Dorset Catalogue as identical with striata 
Chemn.” Forbes & Hanley— Mediterranean, Lam. ed Desh.— 
Cuba, Sagra in B. M. Cat. p. 36.—Brazils, D’ Orb. in B. M. 
Cat. p. 61—St. Domingo, Sir. R. Schomberg, in B. M.— 
Trinidad, Hanl.—This, like many other West Indian shells, 
