212 



terior is faintly tinted yellow when young, but very richly so when 

 old. It is near A. corrugatum, Sowb. 



Donax obesus. T. parva, solida, ovato-cuneata, ventricosa, 

 nitida, radiatim leviter striata, coloribus albidis et fulvidis omnino 

 vel radiatim picta et plerumque zonis violaceis ornata ; angulo pos- 

 tero-dorsali rectangulari ; facie posteriori cordiformi, subtriangulari ; 

 latere antico angustato, cito rotundato ; margine ventrali denticulate, 

 postice coarctato : intus alba, vel flavescens, violaceo nubeculata, ad 

 margineni dorsalern fuscata. 



Long. -^ • alt. t 6 -q ; lat. ^ poll. San Diego. Lieut. Green. 



In general appearance, especially as to striation and posterior 

 area, it is much like D. anatinum ; but the angle at the apex is more 

 nearly a right angle, the anterior margin is less acutely rounded, the 

 striae are none of them punctate ; some of the small specimens are 

 very tumid. The coloration is quite various. 



Tellina miniata. T. transversa, ovata, tenuis, compressa, valde 

 hians, concentrice striata, erubescens ; apicibus ante-medianis ; latere 

 antico semiovali ; latere postico ovato-triangulari ; margine ventrali 

 sub-pendulo : intus miniata : cardo dentibus duobus divergentibus 

 utraque valva instructus ; nymphis conspicuis. 



Long. 2 ; lat. -| ; alt. \\ poll. Inhabits San Juan. Lieut. Green. 



Conqjared with the analogous West India species, T. rosea, it is 

 longer, more delicate, less convex, more inequilateral, more acumi- 

 nated posteriorly, the ventral and posterior margin less arcuate : 

 color much more roseate externally, and intensely red internally ; 

 hinge in that species with but a single tooth and the vestige of one at 

 its side. [It is described as sanguinolaria purpurea, Desh. (1854)]. 



Lucina [Diplodonta] orbella. T. parva, subglobosa, tenuicula, 

 albida, concentrice inequaliter striata ; apicibus medianis, haud emi- 

 nentibus, absque lunula, antiea ; lateribus fere symmetricis ; intus 

 alba. Cardo valvaa dextraa dentibus duobus quorum antico minore — 

 valvar sinistra; dentibus duobus quorum antico bifido, postico perobli- 

 quo, instructus ; dentibus lateralibus nullis ; cicatricibus leviter im- 

 pressis, palleali serie punctorum composite 



Long. | ; alt. f ; lat. £ — f poll. San Diego. Lieut. Green. 



The size and globose form of this shell recalls L. columbella, Lam. 

 (L. Adansonii, D'Orb.) ; but the valves are much less solid, the 

 beaks less elevated, and have no area on either side of them ; and the 

 surface is not lamellar. L. globularis may be more like it. Some 

 specimens are nearly perfect spheres, and all are very convex lenses. 



Tellina (Strigilla) fucata. T. carnarice simillima, sed rotund- 

 ior, striis rarioribus, latioribus et magis angulatis, haud undulatis in- 

 sculpta ; intus omuino miniata. 



