64 On some New Marine Mollusca. 



dracea, crassiuscula, ojpaca, nitente, vel periostraca induta. 

 obscure fulva, vel lutea et alba maculata, apice acuto ; anf. 

 6, rapide decrescentibus, leviter convexis et declivis longit. 

 et transvers. striatis ; striis granulato-punctato (sub lente 

 tantur)i visis) punctis lineis spiralibus dispositis ; aper- 

 tura, obliqua, pyriforr)ie, antice producta, intus cretacea ; 

 plica crassa,per uonbilicur)i tantum visa. Long. 12, Lat. 5 J. 

 Long, apert. 7, Lat. 3|-. Mordialloc, Victoria. W. Kershaw. 



Shell elongately ovate or sub-cylindrical, rather solid 

 opaque, shining or clothed with a periostraca ; shell brown 

 or yellow, with white spots, apex acute ; whorls 6, rapidly 

 decreasing, slightly convex and sloping ; striate lengthwise 

 and transversely, striae granularly dotted, which is only 

 visible under the lens, dots disposed in spiral lines ; aperture 

 oblique, pyriform, produced anteriorly _, chalky white inside ; 

 plait thick, but visible only by looking, as it were, upwards 

 through the umbilicus. 



I believe that the points or dotted s]3iral lines are derived 

 from cilia, which, however, had disappeared from all the 

 specimens examined by me. They would surely be found 

 in younger specimens. Perhaps, after all, this is only a 

 variety of the Physa Dulvertonensis of Tasmania. 



Physa Yareaensis,?^.s. P.t. sub-umbilicata tenui diaphana 

 pallide cornea, nitente, spira acuta; anfr. 4, convexis, de- 

 clivis, 2 apicalibus parvis, tenuiter longitudinaliter striatis, 

 apertura elongata, pyriformi, labro tenuissir)io, antice pro- 

 ducto, labio inconspicuo, plica crassiuscula. Upper Yarra, 

 Victoria. W. Kershaw. 



Shell subumbilicate, thin^ diaphanous, pale, horny, shining, 

 spire acute, whorls four, convex, sloping, two spiral, one small; 

 finely striate lengthwise, aperture elongate, pyriform, labrum 

 very thin produced anteriorly, lip inconspicuous, plait a Uttle 

 thickened. 



A shell with no very determinate characters, of small size 

 and thin. 



Physa Kershawi, n.s. P. t. parva, anguste ovata tenui, 

 periostraca sordida, rugosa, induta, parur}% diaphana, sor- 

 dide fusca; anf. 3 J ad 4, superne conspicue angulatis et 

 planatis, ad angulum regulariter (et sup), ult. anfr. dis- 

 tanter) carinatis ; carinis rotuoiclatis, elevatis ; ad suturas 

 anguste canaliculatis, apertura ovcdi, antice p)roducta ; 

 labro tenui, ad carinas sinuato, labio reflexo, subumbilicato. 

 Long. 8, Lat. 4-|. Upper Yarra. W. Kershaw. 



