DONAX. 



Plate IX. 



Species 60. (Mus. Hanley.) 



DoNAX SAXULUM. Don. testa suhohlongo-trigona,, covi- 

 pressa, soUdiusciild, radiatim Urato-striatd, albidd, 

 nitente, versus margmem epldermide corned stramined 

 indutd, latere postico declivi-angidato, antico longiore, 

 rotimdato. 



The little stone Donax. Shell somewhat oblong tri- 

 angular, compressed, rather solid, radiately ridge- 

 striated, whitish, shining, covered towards the mar- 

 gin with a straw-coloured horny epidermis, posterior 

 side slantingly angular, interior longer, rounded. 



[lab. ? 



A whitish shining shell, although rayed throughout 

 with ridge-like strijE, rather compressed, with the posterior 

 side more angularly slanting than usual. 



Species 61. (Mus. Hanley.) 



DoNAX inceuata. Bon. tesfd oblique trigond, subcurvaid, 

 concentrice leviter striata, strlls radiantUms obsoletis 

 decussatd, subpeUucido-albd, carneo-roseo tmctd, latere 

 postico abnipte rotimdato, antico ac7mtinato-rotttndato. 



The waxen Donax. Shell obliquely triangular, slightly 

 curved, concentrically faintly striated, decussated with 

 obsolete radiating striae, semitransparent white, tinged 

 with flesh-rose, posterior side abruptly rounded, an- 

 terior acuminately rounded. 



Hab. ? 



This odd valve, from Mr. Hanley's collection, is not to 

 be identified with any previously described species of the 

 genus. It is of a subtransparent shining white texture, 

 delicately tinged with fiesh-rose, obsoletely decussately 

 striated, and is equally characteristic in outline. 



Species 62. (Mus. Cuming.) 



Donax obscura. Bon. testa trigono-ovatd, sitbcompressd, 

 concentrice minutissiyne dense striatd, calcareo-albd, 

 latere postico truncato-rotundato, antico longiore, ro- 

 timdato. 



The obscuee Donax. Shell triangularly ovate, rather 

 compressed, concentrically very minutely closely stri- 

 ated, chalk-white, posterior side truncately rounded, 

 anterior rather longer, rounded. 



Hab. ? 



An opake-white species, vei-y closely minutely concen- 

 trically striated, with the side not particularly unequal. 



Fig. 63. (Mus. Hanley.) 



This shell, from Mr. Hanley's collection, named D. 

 Paiiaiiiensis, Philippi, in the author's own handwriting, 

 proves to be a variety of B. Cayennensis. 



Species 64. (Mus. Hanley.) 



Donax met.i. Bon. testa abbreviato-conicd, solidiuscidd, 

 radiatim Urato-striatd, lutescente-albd, intus vitellind, 

 latere jiostico lafo, tmiiidiuscido, acute angnlato-trmi- 

 cato, area jjosticd eximie corrugatd et striatd, latere 

 antico subcontracto, acuminato-rotimdato. 



The cone Donax. Shell shortly triangidar, rather 

 solid, radiately ridge-striated, yellowish-white, in- 

 terior yolk-yellow, posterior side broad and rather 

 swollen, sharply angularly truncated, the posterior 

 area delicately wrinkled and striated, anterior side 

 rather contracted, acuminately rounded. 



Hah. ? 



Of this species we have but an odd valve, broadly an- 

 gularly truncated and a little swollen on the posterior 

 side, the anterior being rather contracted and acuminately 

 rounded. 



Species 65. (Mus. Hanley.) 



Donax introuadiata. Bon. testa trigono-ovatd, radia- 

 tini dense sulcato-striatd, griseo-violaced, pallide vio- 

 laceo biradiatd, radiis intus intense violaceis, latere 

 postico h-evisslmo, lato, gibboso, ad anguliim fimicu- 

 lato, ad aream densissime corrugato et striata, latere 

 antico gradatim cotjipresso-acmninato. 



The inwardly-rayed Donax. Shell triangularly ovate, 

 radiately closely groove-striated, greyish-violet, mark- 

 ed with two faint violet rays, the rays deep violet in 

 the interior, posterior side very short, broad, gibbous, 

 raised into a cord at the angle, very closely wrinkled 

 and striated on the area, anterior side gradually com- 

 pressly acuminated. 



Hab. ? 



A characteristic species, painted with two deep violet 

 internal rays faintly indicated without, broadly gibbous 



June, 1S55. 



