UNIO. 



Plate XLII. 



Species 299. (Mus. Cuming.) 

 Unio fluctigeu. Un. testa complanata, ohlongn, hitus 

 siibc{Fruled, extus obscure olivaced, striata, pli.cis aiigu- 

 latlm. cunvergentibtts et divergentiius riigatd, latere 

 antico brevi, rotunda, margine venirali medio panto 

 contracto, latere postico oblongo, ad terminum angiitis 

 duobus truncolo, margine dorsali subarciiato, marijinf 

 dorso-laturali declivi. 

 The kippled Unio. Shell flat, oblong, bluish witliin, 

 obscurely olive without, striated, and wrinkled with 

 zigzag plaits, anterior side short, round, ventral mar- 

 gin a little contracted in the middle, posterior side 

 oblong, truncated with two angles at the end, dorsal 

 margin slightly arched, dorso-lateral margin sloping. 

 Lea, Unio, vol, vii. p. 68. pi. xxxix. f. 130. 



Hnb. ? 



.'Mthoiigh this species is published by Mr. Lea from 

 Mr. Cuming's specimen as of unknown habitat, that 

 author remarks that it appears to belong to South American 

 types. He observes that it resembles his U. scobitiatns, 

 lull is flatter, with a dift'erent style of plaits on the surface. 



Species 230. 



Unio cjikuleus. Un. testa subovatd, tenui, injlatd, pos- 

 tice oblique biangulatd, i.ntiis ceeruled, extus leviter 

 rugatd, oUvaceo-carulescente, prope umbones oblique 

 rmjis dimricatis decussatd, latere antico brevi, ob- 

 liqiio, margine ventrali stibinflato, postice versus tcrmi- 

 7ium elevato, latere postico oblique oblongo, subacuminato. 



The c«rulkous Unio. Shell subovate, thin, inflated, 

 obscurely bianguiated posteriorly, blue within, lightly 

 wrinkled, bluish-olive without, near the umboes decus- 

 sated with diverging plaits, anterior side short, ob- 

 lique, ventral margin rather inflated, posteriorly raised 

 toH ards the end, posterior side obliquely oblong, sub- 

 acuminate. 



Lea, Unio i. p. 105. t. 13. f. 25. 



Hab. River Hoogly, Hindostan. 



Species 231. (Mus. Cuming.) 

 Unio Cambojensis. Un. testa ovatd, tenui, intus roseo. 



cteruleo el luteo tiuctd, extus undiihilim el angulalim 

 crebre rugatd, latere antico subrotundo, brevi, margine 

 ventrali subinjlato, latere postico oblongo, ad terminum 

 biangulato, margine dorsali recto, margine dorso-late- 

 rali valde declivi. 



The Camboja Unio. Shell ovate, thin, rose tinctured 

 with blue and yellow within, closely wrinkled with 

 angular and undulating plaits outside, anterior side 

 rather round, short, the ventral margin slightly inflated, 

 posterior side oblong, biangular at the end, dorsal 

 margin straight, dorso-lateral margin very sloping. 



Sowekby. 



/fab. Camboja. 



A pretty little shell, wrinkled all over, which does not 

 appear very similar to any species hitherto described. 



Species 232. 



Unio Swinhoei. Un. testa lata, oblongd, iujlatd, tenui, 

 intus albido-carulescente, extus lavigatd, obscure oli- 

 vaceo-nigricante, latere antico subrotundo, margine 

 ventrali injlato, latere postico lata, margine dorsali 

 elevato, margine dorso-lateral i recliusrulo, nmbonibus 

 depressis. 



Swinhoe's Unio. Shell broad, oblong, inflateil, thin, 

 bluish - white within, smooth without, obscurely 

 blackish-olive, anterior side rather roundeii, ventral 

 margin inflated, posterior side wide, dorsal margin 

 elevated, dorso-lateral margin rather straight, um- 

 boes depressed. 



Reeve, MS. 



Hab. Camboja ; Captain Swiidioe. 



Species 233. (Fig. a, Mus. Cuming.) 



Unio Camelopakdalis. Un. testa oblongd, lata, com- 

 pressd, postice subangulald, oblique truucatd, intus 

 alba, crassd, extus olivaceo-lutescente, maculis viridibus 

 subquadratis, radiatim dispositis ornatd, latere antico 

 brevi, snbangustd, margine ventrali rectiusculo, postice 

 subinjlato, latere postico Into, oblongo, margine dorsali 

 elevato, subarcualo, postice amjidalo, umiouibus //urcis, 

 compressis. 



Mav, 1806. 



