C YTIIERE A. 



Plate X. 



Species 41. (Mus. Cuming.) 



Cytiieeea tbigonella. Cylh. leslA Irujono-ovald, com- 

 jn'essiuscnld, fulvd, licido-pnrpi.rco varie tuictd, Icevi- 

 yntd, Ifitfre posticoJh.vHos?. truvcnto. 



The triangular Oytherea. Shell triang-ulnrly ovate, 

 ratlitf oompressetl, fulvous, variously staiued with 

 livid-purple, suiooth, posterior side flexuously trun- 

 cated. 



Lamarck, Anim. sans vert. vol. vi. p. 307. 

 Trigona arKjid'ifem, (rray. 



Hah. West Indies. 



The livid-purple colouring of this little species is gene- 

 rally conspicuous on the umboes. 



Species 43. (Mus. Cuming.) 



Cytherea ingerta. Cjjtli. tcntd ir'ujono-ovald, ylhbosd, 

 titr'mqne iimbones subexcavatd, alba, lavigatd, nilente, 

 nifescente-fusco ohscnrissime macidald. 



The uncertain Cytherea. Shell triangularly ovate, 

 gibbous, slightly excavated on each side of the imi- 

 boes, white, smooth, shining, very obscurely spotted 

 with red-brown. 



Sowerby, Thes. Conch, vol. i. p. 017. pi. liS. f. 17. 

 Trigona inccrta, Deshayes. 



Hob. San Juan. 



A small species of the gibbous form of the genus, with 

 the luiiule and ligaraent areas a little excavated. 



Species 43. (Mus. Cuming.) 



Cytherea Gouldii. Cgtli. testd obllqii'i' trigond, pos- 

 tice siibacumiiiald, gibbosd, soVidd, alba, cuncentrice 

 undiqae dense filoso-Ura Id. 



Gould's Cytherea. Shell obliquely triangular, poste- 

 riorly rather acuminated, gibbous, solid, white, con- 

 centrically densely thread-ridged throughout. 



Hah. Malacca. 



A very distinct, conspicuously-sculptured shell, in Mr. 

 Cuming's collection, with the above name appended to it 

 in manuscript. 



Species 44. (JIus. Cuming.) 



Cytherea nitidula. Cglh. tesld miboblongu-oi-dld, ob- 

 tuse trigond, albidd, fitlco-rnbenle iiudiqiie uiidato- 

 mcirinorutd et strhjald, hemgutd, iiUenle. 



The shining Cytherea. Shell rather oblong-ovate, 

 obtusely triangular, whitish, streaked anil wave-mot- 

 tled throughout with fulvous-red, smooth, shining. 



Lamarck, Anim. sans vert. vol. vi. p. 305. 

 Trigona nitidula, Deshayes. 



Ilab. Mediterranean. 



A prettily-painted species, nearly equilateral, smooth 

 and shiiiinu'. 



Species 45. (ilus. Hanley.) 



Cytherea Hanleyana. Cgtk. testa trigouo-ovatd, gib- 

 bosd, postice subobliqiie prodnctd, albidd, versus urn- 

 bones limdo-cmrulescente tinctd, riifescente-fusco versus 

 marginem interrupte radlatd. 



Hanley's Cytherea. Shell triangularly ovate, gibbous, 

 posteriorly rather obliquely produced, whitish, tinged 

 towards the umboes with livid-blue, interruptedly 

 rayed towards the margin with red-brown. 



SowEKiiY, Thes. Conch, vol i. p. 616. pi. 128. f. 23, 24. 

 Trigona Hanleyana, Deshayes. 



Ilab. ? 



Distinguished by a characteristic, interruptetlly rayed 

 painting of red-brown on a blue-white ground, passing 

 into a deep livid colour at the umboes. 



Species 46. (Mus. Cuming.) 



This proves to be a larger specimen of C. Gouldii, de- 

 scribed at Species 43, and figured above it in the Plate. 



Species 47. (J'ig- a,, f>, Mus. Cuming.) 

 Cytherea Philippinarum. Cytk. tesld cordato-ovatd, 

 inaqnilaterali, subventricosd, crassd, albidd, violaceo- 

 purpurea plus minus profuse lineari-nndnlatd, rndiatd 

 et tincld, concentrice undique dense plicalo-costald, lu- 

 nuld intense purpureo-rosed. 

 The Philippine Cytherea. Shell cordately ovate, in- 

 equilateral, slightly ventricose, thick, whitish, more 



January, 1864. 



