74 



mediocri subfuscd ; columella recta; peritremate modice re- 

 Jiexo, albescente. 

 Long. I-i^; lat. -^^ unc. 



33. Ampuljlaria, probably A. Celebensis, Quoy, Voy. de I'Astr. 

 pi. 57. fig. 1-4. 



34. Natica maculosa. Lam. pellis-tigrina, Chem. 



35. NovACULiNA olivacea, nobis. N. testd oblongd, valde in- 

 cBquilaterali, eiiidermide olivaced, ad extremitates fuscescente, 

 indutd ; natibus erosis ; anterius rotundatd, posterius angulato- 

 rotundatd; margine miperiore ferb recto, postice paululum de- 

 scendente, ventrali medio subcompresso ; intus albd, dentibus 

 lamellatis duobiis recurvatis in utrdque valvd, posteriore bifido. 



Long. ^ ; lat. 3 j^ unc. 



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 

 Ugament 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, striis 

 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 sulcum 

 dorsalem subsinuato ; intus lacted, margine continuo nitentiore ; 

 dentibus cardinalibus in utrdque valvd tribus, duobus bifidis ; 

 dentibus lateralibus brevibus, tenuissime rugosis, hand striatis. 



Long. 3 ; lat. 3^^ ; alt. 1^ 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 outhne, 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. Unio. 



38. Unio. 



I am umvilling 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. 



