A I\I P H I D E S M A . 



Plate VII. 



Species 44. (Mus. Cuming.) 



Amphidesma cancellata. Amph. testa stthohlique ovatci, 

 latere antico midto longiore, earned, auravtio obscure 

 radiatd ; snperjicie undiqne dense obtuse reticulato- 

 cancellatd. 



The cancellated Amphidesma. Sliell rather obliquely 

 ovate, anterior side much the longer, flesh-colour; 

 obscurely rayed with orange ; surface densely ob- 

 tusely reticulately cancellated throughout. 



SowERBY, Species Conch, (inedit.) Amphidesma, f. 8. 



Hab. ? 



An odd valve of this little bluutly cancellated species is 

 all that is at present known. 



Species 45. (Mus. Cuming). 



Amphidesma l.j;ta. Amph. testd ovatd, temdculd, ni- 

 tente, liris tenuibus subflexuosis concentrice scidpid, 

 striis radiantibus minutis radiatd, latere antico multo 

 longiore, laleribns ambobus rotundatis ; albidd, pmyu- 

 7'asce)ite-roseo nitidi biradiatd et punctata. 



The cheerful Amphidesma. Shell ovate, rather thin, 

 shining, sculptured concentrically with thin subtlexu- 

 ous ridges, and rayed with minute decussating strife, 

 anterior side mucb the longer, both sides rounded ; 

 whitish, neatly two-rayed and dotted with purple- 

 rose. 



Semele Imta, A. Adams, Pro. Zool. Soc. July, 1853. 



Hab. ? 



An oval shell, rounded at the ends, delicately rose- 



painted upon a shining white ground. 



Species 46. (Mus. Cuming). 



Amphidesma striata. Amph. testd suhquadrato-cunei- 

 formi, latere antico brevissimo, postico oblongo-pro- 

 ducto, subjlexuuso, tumido ; concentrice lamellald, la- 

 mellis subdistantibus, interstitiis concentrice striatis ; 

 siibpeUncido-albd. 



The striated Amphidesma. Shell somewhat squarely 

 wedge-shaped, anterior side very short, posterior ob- 

 long-produced, subflexuous, swollen; concentrically 

 lamellated, lamellae rather distant, interstices concen- 

 trically striated ; subtransparent white. 



EuppELL, MSS. (Mus. Praukfort.) 



Hab. Eed Sea. 



A delicate white Pefo-icoZa-like species, differing from 

 most species of the genus in having the posterior side of 

 the shell longer than the anterior. 



Species 47. (Mus. Cuming.) 



Amphidesma jugunda. Amph. testd ovatd, lateribus 

 subaqualibus, rotundatis, postico vix Jlexnoso ; com- 

 presso-convexd, tenui, concentrice pidckerrime lamella- 

 tis, lamellis breviter crispatis, interstitiis nitide radia- 

 tim dense liratis ; pellucido-albd, intus sanr/tuneo ma- 

 cuhitd. 



The WELCOME Amphidesma. Shell ovate, with the 

 sides nearly equal and rounded, posterior side a little 

 fle.Kuous ; compressly convex, thin, concentrically 

 very beautifully lameUated, lamelkc shortly curled, 

 interstices neatly radiately densely ridged ; transpa- 

 rent white, spotted within with blood-colour. 



Semele jucunda, A. Adams, Pro. Zool. Soc. July, 1853. 



Hab. Singapore. 



A thin, elaborately sculptured, white species, faintly 

 blood-smeared in the interior. 



Species 48. (Mus. Cuming.) 



Amphidesma pulchella. Amph. testd orbiculari, con- 

 vexd, subaquilaterali, latere postico paululum Jlexuoso ; 

 albidd, epidermide tenui versus maryinem indidd, mn- 

 bonibus purpurascente-roseis, albiradiatis, intus purpu- 

 rascente - tinctd ; lavi, versus marginem concentrice 

 tenuiliratd, striis mimdissimis impressis radiatd. 



The pretty Amphidesma. Shell orbicular, convex, 

 nearly equilateral, posterior side a little flexuous ; 

 whitish, covered towards the margin with a thin 

 epidermis ; umboes purple-rose, white-rayed, interior 

 purple-tinted ; smooth, concentrically thin-ridged to- 

 wards the margin, and rayed with very minute im- 

 pressed striae. 



Semele pulchella, A. Adams, Pro. Zool. Soc. July, 1853. 



Hab. ? 



A species of simple character, purple-stained, and deli- 

 cately white-rayed at the umboes, and tinged witli purple 

 interiorly. 



November, 1853. 



