84 TESTACEOUS MOLLUSCA. 
D. Martinicensis. Lam. 27.—Del.t. 6. f. 15. Transversely 
ovate and flattened, with transverse and very delicate longitudinal 
striz, pinkish white and obscurely rayed ; anterior side obliquely 
truncated, posterior produced and rounded. 2.— Martinique.) 
D. Sprnosa. Chemnitz. f. 258. p. 265.—W. t. 6. f. 11. 
Wedge-shaped ; anterior side extremely short, almost directly trun- 
cated, and the slope decussated by striz, and edged by a spinous 
keel posteriorly ; anteriorly with transverse crenulated striz, pos- 
teriorly with very delicate radiating lines: ventral edge more 
strongly denticulated anteriorly. 2..1.—Tranquebar. 
D. MapaGascariensis. Wood. sup. t. 2. f. 3. Cuneiform, an- 
teriorly very short and obliquely truncated, posteriorly sub-acumi- 
nated, the posterior dorsal edge greatly sloping, the ventral arcuated 
in the middle ; with oblique somewhat flexucus grooves. $.—dMa- 
dagascar. 
D. Dentirera. Nobis. in Z. P. 1843. Sub-triangular, 
crowded with fine simple radiating striae, which posteriorly are 
crossed by a few concentric lines of growth, and anteriorly are de- 
cussated by very close and fine undulating wrinkles, which give a 
granular appearance to the fine radiating raised striz on the some- 
what flattened anterior slope, the latter biangulated, both angles 
defined by a distinct radiating rib or ribs, furnished with a project- 
ing tooth at its extremity: dorsal edge much sloping posteriorly, 
posterior side obtusely rounded : variable in colouring, flesh colour, 
olive yellow, with purple umbones or rayed with purple inside, velvet 
or brilhant pink : ventral edge little arcuated 14.—S. America? 
D. Cartnata. Nobis in Z. P. 1843. Transversely elongated, 
convex, very inequilateral, purplish brown, with more or less dis- 
tinct radiating strize, (usually with obsolete darker rays and polished, ) 
ventral edge little arcuated and forming a very acute point with the 
nearly straight edge of the obliquely truncated and almost flattened 
anterior slope, which is very sharply carinated and sculptured by 
close decussated radiating stricee : inside purple, two lateral teeth 
in each valve, the ventral edge crenated, anterior crenulated. #..12. 
D. Puncrato-striata. Nobisin Z. P.1843. Sub-triangular, 
very convex, pale livid brown, with strong radiating punctated strize, 
becoming very fine and close on the anterior slope, whose edge 
is rounded, posterior and anterior edges much sloping, ventral 

edge convex and rounded at the tip ; ventral edge sub-incurved 
anteriorly : usually violet withm. 2..1.—Jediterranean. 
1 The figure in Delessert professedly delineated from Lamare’s 
own specimen, resembles a Tellina (Punicea ?) rather than a Donax. 
It has an anterior fold, is pale purplish within and without, with two 
obscure short rays, and the hinge sub-central. 
