GUPPY — GULF OF PARI A. 
141 
142. M;. pellucida, Chemn. 
M. ovalina Lam. Wood, Appendix, pi. x, £. *23. 
M. fragilis Wood, Ind. Test. Mactra 32. 
M. brasiliana Lam. Wood, Appendix, pi. x, f. 60. 
143. 31. alata Spengl. Wood, Ind. Test. Suppl. Mactra 7. 
M. carinata Lam. Chenu, Conch, vol. ii, f. 22/ -8. 
Order Lucinacea. 
Iphigenia Schumacher. 
144. I. braziliensis Lam. Woodward, Man. pi. xxi, 
f. 20. 
Don ax Linne. 
145. IT), denticixlatirs Linn. Woodward, Man. pi. xxi., 
f. 19. 
146. X>. striatus Linn. Wood, Appendix, pi. xiv., f. 32. 
These two Donaces appear to be almost always found 
together. Are they the two sexes of one species'? 
147. I >. pulchellus Hanly Wood, Appendix, pi. xiv., 
f. 19. 
D. powisianus Recluz. 
Asaphis Modeer. 
148. A. deflorate, Linn. 
A. rugosa (Lam.) Chenu, Conch, vol. ii., f. 256. 
The A. deflorata of Linne is distinct from A. rugosa Lam. 
The latter inhabits the Pacific, while A. deflorata is the West 
Indian form. When conchologists find it such an easy matter to 
make a dozen species out of one it is regrettable that they cannot 
see the difference between two such species as these. But the 
fact is, mathematical and not natural characters are those which 
commend themselves as most susceptible of easy apprehension 
though of little value in nature. I may note that Sanguinolaria 
taheitensis (J. C. 1852, pi. x., f. 5) is a synonym of A. rugosa 
Lam, 
