\ 
34. MAZATLAN BIVALVES 
51. TeLLIna FELIx, Hani, 
Proc. Zool. Soc. 184A, p. 71.—Hanl. in Sow. Thes. Conch. vol. 1. 
p 281: pl. 58, f.52.—C. B. Ad. Pan. Shells, p. 282. 
Closely resembling a West Indian species in form and colour : 
Hani. compares it with T. donacina. Long. ‘43, lat.*7, alt. °2. 
Hab.—Sandy mud, 6—10 fm. Panama, Cuming.—Panama, rare, 
C. B. Adams.—Mazatlan : extremely rare, L’pool Col. 
Tablet 113 contains 1 perfect valve. 
52. TELLINA STRAMINEA, Desh. 
Proc. Zool. Soc. 1854, p. 363. 
One specimen was found, about two-thirds the size of the 
Cumingian type whith measures long. ‘33, lat. .48, alt. °17. 
It is known from neighbouring species by the rounded very 
faint concentric strie, which are clearly displayed by the 
microscope near the umbo of the adult shell. 
Hab.— Gulf of California, Col. Cuming.—Mazatlan, from Spon- 
dylus washing: L’pool Col. 
Tablet 114 contain the specimen.—l15 contains a minute 
valve and fragment which probably belong to the same. 
53. TELLINA DONACILLA, 2. Ss. 
T. t. gun. donaciformi, valde transversd, tenui, compressa, alba, 
concentrice liratd ; liris acutis, subequidistantibus, alternis, 
medio sepe evanescentibus, antice rarioribus ; epidermide tenuwis- 
sima, hue et illue liras radiatim decussante ; postice valde 
producta, subrotundata ; antice angulata, truncatd, brevissima : 
marginibus ventralt dorsalique fere parallelis ; cardine dentibus 
duobus quarum unus bifidus cardinalibus, laterali uno postico 
brevi appropinquante, extante. 
Related apparently to T. donaciformis, Desh. from Torres 
Straits ; from which it is known at once by the strong projec- 
ting lateral tooth. The shape is so remarkably like a Donax, 
that I have only varied the termination from the British T. dona- 
cina. The specimen is young, but well characterized except in 
the inner surface, which does not display the muscular impres- 
sions. Wong. ‘08, lat. °14, alt. °05. 
Hab.—Mazatlan: off Spondylus Lamarckii, Z’pool Col. 
Tablet 116 contains the only valve found. 
