DONAX. 



Plate III. 



Species 13. (Mus. Cuming.) 



DoNAX TiCAONlCA. Bon. testa trhjono-ovatd, ad umbones 

 acute aiiff/dato-producta, delmle compressd, Im-igntd, 

 nitente, ad aream ponticam crispato-drintd, albidd aut 

 fulvo-castaned, epidermide corned interdum indutd, la- 

 tere postico hrevusbiie trmicato, antico acnmiiiato- 

 rotuiidato. 



The Ticao Donax. Shell triangularly ovate, sharply 

 angled and produced at the umboes, then com- 

 pressed, smooth, shining, crisply striated on the 

 posterior area, whitish or fulvons-chestnut, some- 

 times covered with a horny epidermis, posterior side 

 very shortly truncated, anterior aeumiuately rounded. 



Hanley, j\[S. (Mus. Cuming.) 



Hab. Island of Ticao, Philippines ; Cuming. 



Chiefly distinguished by the sharply angled produced 

 growth of the umboes. 



Species 14. (Mus. Cuming.) 



Donax columbella. Don. tesid triyoiio-ovaid, tenui- 

 cnld, compressd, sub lente mimite radiatim striata, ni- 

 tente, rosacea vel purjmrascente-cinered, concentrice 

 fasciatd, latere antico rotwndato, postico declivi-trmi- 

 cato, obtuse a?iffulafo. 



The little dove Donax. Shell triangularly ovate, 

 rather thin, compressed, beneath the lens minutely 

 radiately striated, shining, pinkish or purpUsh-ash, 

 concentrically banded, anterior side rounded, poste- 

 rior slantingly truncated, obtusely angled. 



Lamakck, Anim. sans vert. (Deshayes' edit.) vol. vi. p. 21-2. 



Hab. Swan Eiver ; Dr. Bacon. 



A somewhat delicate species, variously coloured. 



Species 15. (Mus. Cuming.) 



Donax cuneata. Bon. testa suMrigono-oblongd, com- 

 pressd, sub lente minute radiatim striata, nitente, piir- 

 purascente, albifasciatd, interdum, plumbed, lineis ru- 

 fescentibus subtilissime venosd, latere antico acuminato- 

 rofundato, postico late angulato et crispato-granato. 



The wedge-like Donax. SheU subtriangularly oblong, 

 compressed, beneath the lens minutely radiately stri- 

 ated, shining-purplish, white-banded, sometimes lead- 



colour, finely veined with reddish Mnes, anterior side 

 acuminately rounded, posterior broadly angled and 

 crispately granuled. 



LiNNiEUS, Syst. Nat. (12th edit.) p. 240. 



Hab. Ceylon. 



A somewhat broad compressed species, crisply granuled 

 on the posterior area, which is rather broadly bluntly 

 aneled. 



Species 16. (Mus. Cuming.) 



Donax punctato-steiata. Bon. testd trigono-ovatd, so- 

 lidiu-sculd, umboiiibiis subcentralibus, compres-w-gib- 

 bosis, radiatim punciaio-striatis, striis sulciformibus ; 

 pallide limdo-fuscd vel fulvo-castaned ; later ibus de- 

 clivi-angulatis, postico concavo-appresso. 



The punctured-striated Donax. Shell triangularly 

 ovate, rather solid ; umboes nearly central, com- 

 pressly gibbous, radiately punctured-striated, stria3 

 groove-like ; pale livid-brown, or fidvous-ehestnut ; 

 sides slantingly angled, posterior concavely appressed. 



Hanley, Pro. Zool. Soc. 1843, p. 5. 



Hab. Mazatlan, Gulf of California. 



Of a peculiar stoutly angled Crassatella-Yiks form, with 

 the umboes nearly central. 



Species 17. (Mus. Cuming.) 



Donax ovalxna. Bon. testd ovatd, compressiusculd, 

 utrinque convexd, concentrice rude striatd, albidd, ni- 

 gricante-purpureo inferrtipte radiatd, vel plumbeo- 

 cinereo obscure tenuiveuosd; lateribus subaqualiter 

 rotuudatis. 



The oval Donax. Shell ovate, rather compressed, every- 

 where convex, concentrically rudely striated, whitish, 

 interruptedly rayed with darkish purple or leaden- 

 ash, obscurely finely veined; sides nearly equally 

 rounded. 



Deshayes, Pro. Zool. Soc. March, 1854. 



Hab. ? 



This has hardly the character of Bonax, being in no 

 degree wedge-shaped, but rather the external form of 

 Amphidesma. 



September, 1854. 



