154 The Museum Gazette 



i 



Figs. 28, 29. R. semistviata (— Cingula semistriata). May be 

 known from allied species by its shortness and solidity. 

 Whitish or fulvous, with elongated or square spots arranged 

 spirally. R. inconspicua, another common and variable species, 

 is smaller, uniformly glossy-white, or streaked with red. 



Fig. 30. Emarginula reticulata (= E. fissuva). White within 

 and without. E. conica (= rosea) of our southern coasts differs 

 in the greatly recurved apex. E.cvassa is larger than either of 

 the preceding, and is rare. 



Fig. 31. Phasianella pullus. The most brilliantly coloured 

 of all our native shells. Purplish-rose, crimson-red or brown, 

 with variable spots and wavy lines. 



Fig. 32. A deorbis subcarinatus. Entirely white. Operculum 

 circular, flat, multispiral. 



Figs. 33, 34. Velntinalavigata. Naticanitida. This species, 

 which also appears in. Plate I., figs. 12, 13, has, through an 

 unfortunate error, been reproduced here. 



Fig. 35. Dentalium entails. Porcelain-white, not striated. 

 D. tarentinum (— vulgar e) is a smaller species, distinguished by 

 the fine striae on the posterior end. 



Bivalves. 

 Description of Plate III. 

 Fig. 1. Mya truncata. The whitish shell is covered uni- 

 formly with a loose yellowish-grey epidermis. M. arenavia, 

 the only remaining British species, is larger, the epidermis 

 is ash colour, and the valves are not infrequently stained 

 black. 



Fig., 2, Lima Loscombi. Pure white, delicate, fragile, L. Mans 

 is much larger, less translucent, and often stained brown in 

 adult specimens. 



Fig. 3. Psammobia vespertina (= P. depressa). " The Setting 

 Sun." "The colouring consists of numerous alternate rays 

 of carnation or livid pink and white, the preponderance of 

 each hue varying in different examples." P. ferroensis is 

 closely striated with raised concentric lines. 



