PSAMMOBIA. 



Plate IV. 



Species 22. (Mus. Cuming.) 



Fs.\MMOBiA AFFiNis. PmM. testd ovato-transversd, (equi- 

 lalerali, transvenhn rude striata, striis in medio suli- 

 ubaoletis, antice distinciis, postici suhplicatis ; lutes- 

 cenie-albd, cartieo-roseo verms margines promisctie ra- 

 diatd, lateribm rotundatis, postico parum truncato. 



The allied Psammobia. Shell ovately transverse, equi- 

 lateral, transversely rudely striated, strite almost ob- 

 solete iu the middle, distinct anteriorly, slightly pli- 

 cated posteriorly ; ycUovvish-white, promiscuously 

 rayed towards the margins with flesh-rose, sides 

 rounded, the posterior but little truncated. 



Hah. New Zealand and the Philippine Islands. 



A species intermediate in its character between v^. ^ro/a 



and wspertina. 



Species 23. (Mus. Cuming.) 

 Ps.^MMOBlA PULCHELLA. Psam. testd subaiiffuste trans- 

 versa, compressd, uiaquilaterali, oblique nitide elevato- 

 striatd, striis ad mari/iuem arece posticm abrnpte ter- 

 minatis ; c/eruleo-purpured, ferrtigineo tinctd, albo 

 nmltiradiaid, latere aiitico rotundato, postico declivi- 

 Iruncaio, ared snbl^vigatd, ab mnhone superfcialiter 

 impresso. 

 TnK PRETTY Psammobia. Shell rather narrowly trans- 

 ver.se, compressed, inequilateral, obliquely neatly ele- 

 vately striated, striEB abruptly terminated at the edge 

 of tlie posterior area ; blue-purple, tinged with rust, 

 many-rayed with white, anterior side rounded, pos- 

 terior slopingly truncated, impressed superficially 

 with a nearly smooth area from the umbo. 

 Lamaiick, Anini. sans vert. vol. vi. p. 177. 

 Ilab. Bay of ilanila, Philippines ; Cuming. 



The sculpture of this species consists of numerous ob- 

 lique raised strisr, which terminate suddenly along the 

 edge of a superficially impressed area sloping posteriorly 

 from tlie uinl)o. 



Species 24. (Mus. Cuming.) 



jAM.MoniA coMPTA. Psani. testd elongato-transversd , 



/equilaterali, compressd, temiiculd, leevigatd et pro- 



miseue sulcato-striatd, striis posticl plicatis; livido- 



c/enilescente, purpureo-viohiceo radiatd, latere antico 



December, 



rofmidato, postico decUvi-trnncato, aream concaram 

 ab iimbone furmante. 

 The neat Psammobia. Shell elongately transverse, 

 equilateral, compressed, rather thin, smooth or pro- 

 miscuously groove-striated, stria? posteriorly plicated . 

 livid-blue, rayed with purple violet, anterior side 

 roundcfl, posterior slopingly truncated, forming a 

 concave area from the umbo. 

 Deshayes, Pro. Zool. Soc. 1854, p. 321. 

 Hob. Catbalonga, Island of Samar, Philippines ; Cuming. 

 The striae are almost obsolete in the centre of the valves, 

 the surface of that part being smooth, crossed by inter- 

 rupted linear grooves. 



Species 25. (Mus. Cuming.) 



P.sammobia intermedia. I'sam. testd ovato-trumrersd, 

 coiivexiusculd, solidd, esquilaterali, albidd, roseo teniii- 

 radiatd, epiderinide luted partiin indutd, transversim 

 rugosd, rugis rudibus, solidiusculis, promisciie midu- 

 latis, postice crassioribits, valde irregularibns, latere 

 atitico rotundato, postico subattenuato, compresso, de- 

 clivi-trnncato. 



The intermediate Psammobia. Siiell ovately trans- 

 verse, rather convex, solid, cciuilateral, whitish, finely 

 rayed with rose, partially covered with a yellow epi- 

 dermis, transversely wrinkled, wrinkles rude, rather 

 solid, promiscuously waved, posteriorly thicker and 

 very irregular, anterior side rounded, posterior rather 

 attenuated and compressed, slopingly truncated. 



Deshayes, Pro. Zool. Soc. 1854, p. 319. 



Ilab. Faro, coast of Portugal ; M'.\ncirew. 



A fine species, chiefly distinguished by the boldness 

 and irregular waved development of its wrinkled sculpture. 



Species 26. (Pig. a, b, Mus. Cuming.) 



Psammobia ornata. Psam. testd otato-transtersd, sub- 

 veiitricosd, subaquilalerali, lutescente-albd, purpureo- 

 caslaiieo et rufo-violaceo promi-scue maculatd et oljscuri 

 radiatd, oblique striato-rugosd, rugis postice irregu- 

 lariter undato-pUcatis, latere antico rotundato, postico 

 truncato-rotundato, ab umbone convexo-impresso. 



The ornate Psammobia. Shell ovately transverse, 

 subventricose, nearly equilateral, yellowish -white, 



18.56. 



