84 TESTACEOUS MOLEUSCA. 



D. Martinicensts. Lam. 27. — Del.t. 6. f. 15. Transversely 

 ovate and flattened, with transverse and very delicate longitudinal 

 striae, pinkish white and obscurely rayed ; anterior side obliquely 

 truncated, posterior produced and rounded. 2. — Martinique. 1 



D. Spinosa. 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 striae, and edged by a spinous 

 keel posteriorly ; anteriorly with transverse crenulated striae, pos- 

 teriorly with very delicate radiating lines : ventral edge more 

 strongly denticulated anteriorly, f . . 1 . — Tranquebar. 



D. Madagascariensis. 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 flexuous grooves, f . — Ma- 

 dagascar. 



D. Dentifera. 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 striae 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 brilliant pink : ventral edge little arcuated 1^. — S. America? 



D. Carinata. Nobis in Z. P. 1843. Transversely elongated, 

 convex, very inequilateral, purplish brown, with more or less dis- 

 tinct radiating striae, (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 striae : inside purple, two lateral teeth 

 in each valve, the ventral edge crenated, anterior crenulated. f •• If . 

 D. Punctato-striata. Nobis in Z. P. 1843. Sub -triangular, 

 very convex, pale livid brown, with strong radiating punctated striae, 

 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 within. f..l. — Mediterranean. 



1 The figure in Delessert professedly delineated from Lamarc'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. 



