DONAX. 



Plate II. 



Species 6. (Mus. Curaing.) 



DoKAX Hanleyana. Boh. testa trujonO'Cuneatd, radia- 

 tim Uneari-sulcatd, c'merascente-albd, piirjpiirasceide- 

 roseo latiradiatd, valde iruequilaterali, jjodice yihbosd, 

 abrupti trimcatd, antice acumhiato-coarctatd et paulu- 

 Imn Jdante ; area posticd convexd, concentrice grann- 

 latd, utrinqne tenuicaritiatd. 



Hanley's Donax. Shell triangularly wedge-shaped, ra- 

 diately linearly grooved, pale ash-white, broadly rayed 

 with purplish-rose, very inequilateral, posteriorly gib- 

 bous, abruptly traucated, anteriorly acuminately con- 

 tracted and a little gaping; posterior area convex, 

 concentrically granulated, finely keeled on each side. 



Philippi, MS. (Mus. Cuming.) 



Eab. Eio Janeiro. 



Chiefly distinguished by the acuminated aud pinched 

 growth of the anterior end, whilst the posterior is full and 

 granulated. 



Species 7. (Kg. «, b, Mus. Cuming.) 



Donax teifasciata. Bou. tedd subtrigono-ovatd, laii/is- 

 ciild, roii/pre-isd, teuiiissime radiatim striatd ; albidd, 

 rosea i.rifascitttd, vel cinered, plumbeo-tinctd ; lateribits 

 decUvM-otmidaiis, postico vix truncato, obtuse aiuju- 

 lato, mspalo-corrutjato. 



The three-banded Donax. Shell somewhat triangu- 

 larly ovate, rather broad, compressed, very finely ra- 

 diate! • striated ; whitish, three-banded with rose, or 

 ash-cblour, lead-stained; sides slantingly rounded, 

 postciior side scarcely truncated, obtusely angled, 

 crispa!:ely wrinkled. 



Hah. PhOippine Islands. 



A compressly ovate species, variously coloured, with the 

 posterior side delicately crisply wrinkled and little trun- 

 cated. 



Species 8. (Mus. Cuming.) 



Donax compressa. Bon. testd trujono-cmmformi, com- 

 pressissimd, postice lata, obtuse augidatd, autice ro- 

 tmidatd, radiatim mimdissinw dense striata; ared 

 posticd mimUissime crispato-corrugatd ; griseo-cinered, 

 lineis obsctire vcuosd, ad wmbones violaceo triradiatd. 



The compressed Donax. Shell triangularly wedge- 

 September, 185-i 



shaped, very compressed, posteriorly broad, obtusely 

 angled, anteriorly rounded, radiately very minutely 

 densely striated ; posterior area very minutely cris- 

 pately wrinkled ; greyish-ash, obscurely veined with 

 lines, three-rayed with violet at the umboes. 



Lamarck, Anim. sans vert. (Deshayes' edit.) vol. vi. p. 240. 



Hub. Sumatra. 



Peculiarly compressed from the posterior side, which is 

 broad aud obtusely angled. 



Species 9. (Mus. Cuming.) 



Donax rdgosa. Boh. testd elongato-oblongd, solidiiisculd, 

 dense radiatim sulcatd; cinereo-spadiced, interdiini al- 

 bifasciatd, vel miniato tinctd ; valde iutsqiiilaterali, 

 latere postico abruptissime trwicato, ad angnlmn cari- 

 nato ; ared concentrice nndato-corrugatd, latere nntico 

 acmninato-rotundato. 



The rough Donax. Shell elongately oblong, rather 

 solid, densely radiately grooved ; ash-fawn, some- 

 times white-banded, or scarlet-tinged, very inequila- 

 teral, posterior side very abruptly truncated, keeled 

 at the angle ; area concentrically wave-wrinkled, an- 

 terior side acuminately rounded. 



LiNN.EUS, Syst. Nat. (13th edit.) p. 1127. 



Hab. Gold Coast, West Africa. 



Distinguished by its narrow oblong-conical form and 

 wave-wrinkled posterior area. 



Species 10. (Mus. Cuming.) 



Donax assimilis. Bon. testd rotundato-olAongd, medio 

 subcontractd, sordide cinered, ad marginem plumbeo- 

 fasciatd, ad umhones violaceo radiatd, radiatim dense 

 Uneari-sulcatd, postice granoso-decussatd, latere antico 

 rotundato, postico concavo-trimcato. 



The similar Donax. Shell rotundately oblong, subcon- 

 tracted in the middle, dull ash-colour, lead-banded 

 at the margin, violet-rayed at the umboes, radiately 

 densely linearly grooved, posteriorly granosely de- 

 cussated, anterior side rounded, posterior coucavely 

 truncated. 



Hanley, MS. (Mus. Cuming.) 



Hab. Panama. 



