DONAX. 



Plate VI. 



Species 33. (Miis. Cuming.) 



DoNAX ACUTANGULA. BoH. festd eloiujato-ohlo>i(/d, mr- 

 vatd, siibensiformi, ebm-iwd, lavigatd, nitenie, sub lente 

 striis teimissimis decmsatd, valde inaquilaterali, la- 

 tere antico rotundato, postico acute anguJato, concavo- 

 truncato ; area subtilisdme Jimbriato-striatd. 



The shaep-angled Donax. Shell elongately oblong, 

 curved, somewhat sword-shaped, ivory-white, smooth, 

 shining, beneath the lens decussated with very fine 

 strise, very inequilateral, anterior side rounded, pos- 

 terior sharply angled, and concavely truncated ; the 

 area very finely fimbriately striated. 



Deshayes, Pro. Zool. Soo. March, 18.54. 



Hab. Mouth of the Gaboon, West Africa. 



A very delicate subtransparent ensiforra species, very 

 abniptly angularly truncated at the posterior end, the an- 

 terior being very elongately produced. 



Species 34. (Mus. Cuming.) 



Donax nitid.\. Bon. testa lanceolato-obloiigd, snhtri- 

 gond, gibbosuld, lamgatd, nitente, eburned, ad umbones 

 obsolete carueo biradiatd, latere antico acuminato- 

 prodncto, postico declivi-tnmcato, angulato ; area sub- 

 coucavd, couceidrice corrvgato-Uratd. 



The shining Donax. Shell lanceolately oblong, some- 

 what triangular, rather gibbous, smooth, shining, 

 ivory-white, marked with two obsolete flesh-rays at 

 the umboes, anterior side acuminately produced, pos- 

 terior slantingly truncated, angled; area subconcave, 

 concentrically wrinkle-ridged. 



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



Hab. East Australia ; Strange. 



Chiefly distinguished by its slantingly acuminated sides, 

 and by the posterior area being conspicuously wrinkle- 

 ridged, while the rest of the sheU is smooth and highly 

 polished. 



rayed with gTey, concentrically striated, obsoletely 

 radiately grooved, anterior side rather narrowly acu- 

 minated, posterior very short, obtusely angled and 

 rounded, margin crenated. 



Hanley, Pro. Zool. Soc. 1843, p. 6. 



Hab. West Indies. 



A narrow oblong species, a little compressed in the 

 middle, of a greyish-white, rayed and banded with black- 

 ish-grey. 



Species 35. (Mus. Cuming.) 



Donax pulchella. Don. testa elongato-oblongd. Medio 

 snbcoiiipressd, cinereo-albd, griseo radiatd et fasciatd, 

 conceiitrice striata, obsolete radiatim sulcatd, latere 

 antico subanguste acuminato, postico brevissimo, obtuse 

 angulato et rotundato, margine crenato. 



The pretty Donax. SheU elongately oblong, a little 

 compressed in the middle, ash-white, banded and 



September, 1854. 



Species 36. (Mus. Cuming.) 



Donax transversa. Bon. testa angusie elongatd, teuui- 

 culd, gibbosd, utrinque Mante, lavigatd, sub lente ob- 

 solete striata, lutescente-albd, olivaceo-carneo fasciatd 

 et latiradiatd ; umbonibus violaceo radiatis, valde in- 

 aquilaterali ; latere antico recto, versus marginem de- 

 cUvi-rotundato, postico abrupte truncato, acute angu- 

 lato, ad angulum carinato ; area concavd, temiiliratd. 



The transverse Donax. Shell narrowly elongated, 

 rather thin, gibbous, gaping at each end, smooth, 

 beneath the lens obsoletely striated, yellowish-white, 

 banded and broadly rayed with olive-flesh; umboes 

 violet-rayed, very inequilateral ; anterior side straight, 

 slantingly rounded towards the margin, posterior 

 abruptly truncated, sharply angled, keeled at the 

 angle ; area concave, tinely ridged . 



SowERBY, TankerviUe Catalogue, App. p. 4. no. 326. 



Hab. ? 



An extremely characteristic species, of straight elon- 

 gated growth, gaping at both ends, stained with violet in 

 the interior. 



Species 37. (Mus. Cuming.) 



Donax Owenii. Bon.testd elongato-ovatd, convexo-com- 

 pressd, lavigatd, sub lente striis subtilissim.e decussutd ; 

 albidd, lutescente versus marginem obscure radiatd, 

 umbotiibus violaceo radiatis ; latere antico acuminato- 

 rotundaio, postico declivi-truncato, area concavd, con- 

 centrice corrugato-liratd. 



Owen's Donax. Shell elongately ovate, conve.xly com- 

 pressed, smooth, beneath the lens very finely decus- 

 sately striated ; whitish, obscurely rayed with yellow 

 towards the margin, umboes rayed with violet ; an- 

 terior side acuminately rounded, posterior slantingly 

 truncated ; area concave, concentrically wrinkle- 

 ridged. 



