H APPENDIX. 



58. ASPERGILLUM SPARSUM. 



A. vagind Isevi, disco postico fimbria radiatA circum- 

 dato, tubulis fimbriaB majusculis^ poris disci postici 

 majusculis, sparsis. 



Ohs. It is rather doubtful which of the two spe- 

 cies in this collection (leaving A. vaginiferum out of 

 the question) ought to be considered as A. Javanum 

 and which is undescribed by Lamarck. The great 

 difterences consist in the number and size of the 

 tubes of which the radiated fringe is composed, and 

 in the number and size of the perforations in the 

 disk, both of which, in the species I have here called 

 A. sparsian, are twice as large and not half so nume- 

 rous as in that which I have considered as A. Ja- 

 vanum. 



116. MACTRA ELEGANS. 



M. tests, rotundato-trigona, tumida, tenui, antice 

 acute carinata, superficie eleganter concentrice 

 sulcata; sulcis rotundatis. 



Obs. A much rounder and more tumid shell than 



Mactra plicataria. 



117. MACTRA ASPERSA. 



M. testa elliptic^, inaequilaterali, antico latere postico 

 duplo longiore, umbonibus subprominentibus, su- 

 perficie sulcis transversis obsoletiusculis 5 colore 

 albido, fusco asperso. 



Obs. This shell resembles Venus virginea in 



general form, like that shell it is smooth and slightly 



grooved transversely ; it is, however, of a whitish 



colour speckled with brown. 



121. CRASSATELLA RADIATA. 



C. test^ arcuata, antice acute rostrata, carinata j su- 

 perficie arcuato-sulcata, maculis spadiceis inter- 

 ruptis radiata. 



