74 
mediocri subfuscd; columelld rectd; peritremate modicé re- 
fiexo, albescente. 
Gia 5 
Long. 1,5; lat. ;5 une. 
33. Amputtaria, probably 4. Celebensis, Quoy, Voy. de l Astr. 
pl. 57. fig. 1-4. 
34. Natica macutosa, Lam. pellis-tigrina, Chem. 
35. NovacuLina oLtvacega, nobis. WN. testd oblongd, valde in- 
equilaterali, epidermide olivaced, ad extremitates fuscescente, 
indutd ; natibus erosis ; anterius rotundatd, posterius angulato- 
rotundatd ; margine superiore fere recto, postice paululum de- 
scendente, ventrali medio subcompresso; intus albd, dentibus 
lamellatis duobus recurvatis in utrdque valvd, posteriore bifido. 
Long. 53, ; lat. 3,3, une. 
A large example of this species, in the Collection of H. Cuming, 
Esq., exhibits a character which will probably be found generic ; 
namely, a shelly protuberance in each valve, attached to the interior 
ligament at nearly its hinder extremity. These shelly substances 
have not, that I am aware, hitherto been noticed. It is probable 
that they become detached in most specimens by the removal of the 
animal. 
36. CyRENA TRIANGULARIS, nobis. C. testd trigond, solidius- 
culd, epidermide fusco-virescente, transversim striatd, stris 
marginalibus lateralibusque eminentioribus, sulco ab umbone 
ad marginem posteriorem leviter impressd ; margine antico de- 
scendente, vix excavato, angulo anteriore rotundato ;\ margine 
superiore subrotundato, postice fere biangulato, propter suleum 
dorsalem subsinuato ; intus lacted, margine continuo nitentiore ; 
dentibus cardinalibus in utrdque valvd tribus, duobus bifidis ; 
dentibus lateralibus brevibus, tenuissime rugosis, haud striatis. 
Long. 3; lat. 3,5; alt. 1,8 unc. 
The characters of this shell bear some resemblance to C. Suma- 
trensis, Sow. Gen.; but on comparison with the type of that species, 
now in the Cabinet of Sylvanus Hanley, Esq., the present is found to 
differ materially, in its triangular outline, as well as in the character- 
istic furrow from the umbo to the posterior margin, affecting the 
curvature of the posterior angle, and producing a slight sinuosity in 
the margin. 
37. Unto. 
38. Unio. 
I am unwilling to describe as new these two species of the genus 
Unio, from want of acquaintance. with the great American collections 
of the genus. 
Although no letter accompanied this box of shells, Mr. Hamilton 
presumes that they have been sent to him by his friend Sir J. Brooke, 
Rajah of Sarawak. The remittance is undoubtedly from Borneo. 
