43 
sepe extensis ; latere antico subangulato, striis brevibus ornato ; 
postico subquadrato, parim productiore. Reeve, Conch. Icon. 
Crassatella, pl. 1. f. 4. 
Long. 23; alt. 24 poll. 
Hab. ad oras Nove Hollandie. 
Crassatella Kingicola, Nobis (falsd), Conch. Syst., vol. i. pl. 44. f. 3. 
This species, which has lately arrived from New Holland in great 
abundance, has been received by most collectors as the Crassatella 
Kingicola of Lamarck; I moreover regret that it has been errone- 
ously figured under that title in my ‘ Conchologia Systematica.’ This 
error was kindly pointed out to me by Mr. Sowerby, and I am now 
satisfied that the shell of Lamarck’s Crassatella Kingicola, which is 
accurately figured in the ‘Genera of Recent and Fossil Shells,’ is 
one of extreme rarity. Mr. Cuming possesses a gibbous variety of 
the C. decipiens, but it is not sufficiently distinct to demand especial 
notice. Mr. Owen is we believe engaged upon the anatomy of this 
species. 
4. CrassaTELLA PULCHRA. Crass. testd ovato-trigond, depressd, 
obsolete radiatd, epidermide crassd, fibrosd, molliusculd, indutd ; 
transversim sulcatd, sulcis profundis, regularibus ; latere antico 
rotundato ; postico subangulato. Reeve, Conch. Icon. Crassatella, 
pl. 3. f. 16. 
Long. 27; alt. 2 poll. Mus. Cuming, Stainforth. 
Hab. ad oras Nove Hollandie. 
De Blainville appears to have figured this shell in his ‘ Manuel 
de Malacologie’ as the Crassatella sulcata of Lamarck ; but it is of a 
totally different form, nor does it agree with the Mactra sulcata of 
Bruguiére, to which he refers in the ‘ Encyclopédie Méthodique’ ; I 
therefore now propose to distinguish it by the above new title. The 
shell of the Crassatella sulcata approaches rather in form to that of 
the Crassatella rostrata, the anterior side of which is specially cha- 
racterized as being productiore ; the grooves too in that species run 
- irregularly across the valves, and are not parallel with the lines 
that mark the increase of growth. The shell of the Crassatella pul- 
chra, ou the contrary, is of a plain triangular form; the posterior 
side is but slightly produced, the grooves are very deep, and they 
run parallel with the lines of growth. 
5. CRASSATELLA LAPIDEA. Crass. testd ovato-orbiculatd, epider- 
mide fibrosd indutd, umbonibus parvis, striatis ; intis subfuscd ; 
latere antico rotundato, abrupto, striis nonnullis brevibus ornato ; 
postico subangulato. Reeve, Conch. Icon. Crassatella, pl. 2. f. 7. 
Long. 12; alt. 14 poll. Mus. Cuming. 
Hab. ad insulam Negros, Philippinarum. 
Mr. Cuming met with one true pair only and a few odd valves of 
this species at the Island of Negros in coarse sand in seven fathoms 
‘water. The shell somewhat resembles that of the Crassatella donacina, 
but may however be readily distinguished. 
6. CrassaATELLA ponacinaA. Lamarck, Anim. sans vert., vol. v. 
p. 481. Reeve, Conch. Icon. Crassatella, pl. 3. f. 19. 
