P II Y S A. 



(I\lus. Brit.) 



Phvsa Mareotica. riiy. tisli'i purrd, mhcylituli '((•(%, 

 IcBvigatA, nllnilA, scinijicl/ucidK s/tird t:calata, iiii- 

 fnictihiis Iribus. suh<piadriitis, ultimo versus sntiiram 

 turn/do, ftihaiii/ulato ; apcrtiird oblon;/d, sujtenic an- 

 giihiti'i, columeUd j-t cHuyculii. 



The JIaheotis Phvsa. Sliell smal!, subcyliiulricul, 

 sniootli, whitish, scmipclhicic!, spire in steps, 

 whorls tlireo, rather si|u:ire, the last tumid, angular 

 near the suture ; aperture oblong, angular above, 

 columella rather straight. 



SOWERBY. 



Hab. River Mareotis, Egypt. 



Spe.-ie.s 79. (:Nrus. Brit.) 



PilYSA NaTAI.KNMS. I'll//. I,st,; SulH/lobos.l, JKlIlhVc 



corned, hvriijatd, sfuiijitlluciild, sjiird bnri.^^imd ; 

 ultimo anfractu injlato, supenir siibdiijulalo, post 

 columelUim cxcuvato ; apcrturd ?i(aijud,poi<tirt- sub- 

 anijulald, antiee subactiminatd. 



The Natal Physa. Shell subglobose, pale -horn, 

 smooth, semi-pellucid, spire very short ; last whorl 

 inflated, slightly angular above, excavated behind 

 the columella ; aperture large, posteriorly some- 

 what angular, anteriorly slightly acuminated. 



Krauss. Sudairikanischen Mollusken, p. <S4, Tab. V. 

 f. 10. 



Hab. Natal, in stagnant pools. 



Species 80. (JIu 



Copied.) 



Physa microstoma. Pliy. testd parvd, ovatd, Icevigatd, 



albidd ; spird aperttwam longitudine fere CBqiianti ; 



aperturd angus/d, columdld crassd, leviter bi- 



dentatd. 

 The small-mouthed Physa. Shell small, ovate, smooth, 



white ; spire nearly equalling the aperture in 



length; aperture narrow, columella thick, sliglitly 



bidentate. 

 Haldejian. Monograph, Physada;, p. ;15, PI. V. f. 10. 

 Ilab. North America. 



On the inner edge of the columella in this species are 

 two small tooth-like projections. 



Species SI. (Mus. 



Copied.) 



Physa I)L\ph.vna. PJq/. testd pared, vitrced, subglobosd ; 



spird brcvi, anj'ractihus paueis, distinetis, tumidis ; 



ultimo anfractu infato ; apcrturd sendovatd ; colu- 



invlld vix arcuatd. 

 The diaphanous Physa. Shell small, glassy, sub- 

 globose ; spire short, whorls few, distinct, tumid ; 



last whorl inflated ; aperture semiovate ; columella 



scarcely arched. 

 Kuauss. Sudafrikanischen Mollusken, p. 81, Tab. V. 



I 11. 

 Hab. Umgani valley. Natal. 



A very small transparent species. 



Species 82. (Mus. Brit.) 



Physa neritoidea. PIi?/. testd parvd, solidd, oblique 

 subglobosd, succineo-rufescenti, strigis albidis notatd, 

 spird brevi, obtusd, anfractibus duobus, brevibus, 

 ultimo anfractu, infato, antiee oblique expanse ; 

 aperturd subpyriformi ; labio externa antiee oblique 

 producto ; columelld lata, cornplanatd, plied tortttd, 

 conspicud. 



The nerita-shaped Physa. Shell small, solid, obliquely 

 subglobose, reddish amber, marked with white 

 stripes, spire short, obtuse, whorls two, short, last 

 whorl inflated, anteriorly obliquely expanded, 



April, 1873. 



