MOLLUSCA. 59 



Paltjdina. Lamarck. 



241. Paludina seminalis, Hinds, Ann. Fat. Hist., vol. x. p. 83, (Plate XVI. fig. 22.) Testa retuse 

 turrita, solidula, cornea, Ifevi ; apice eroso ; anfractibus quatuor ; apertura cserulescente, effusa. 



Inhab. Rio Sacramento, California. 



Distinguished from P. nucha, Lea, which is from a neighbouring locality, by 

 its somewhat smaller size, bluish instead of white mouth, having one whorl less, 

 the aperture more expanded, and absence of the black line round the mouth, 

 which when present is so good a character in his shell, but which, in my numerous 

 specimens of it, I do not find at all constant, and usually only to be seen in those 

 better developed. Anoclon angulatus was also found abundant in this river, where 

 it serves the natives as an article of food, and we saw the shells in numbers 

 around their deserted fires. Elsewhere it seems hitherto to be very scarce. 



Family — Operculace^e. 



Pupina. Vignard. 



242. Pupina aurea, Hinds, Ann. Nat. Hist., vol. x. p. 83, (Plate XVI. fig. 20,21.) Testa, ovali, 

 nitida, aurea ; suturis obsoletis ; apertura infra, incisa, supra emarginata, dentata ; fissura sursum 

 ascendente. 



Inhab. New Guinea; in the moist soil of the forest. 



This and the following species belong to the section of Pupina with two 

 notches in the margin of the aperture. The inferior is in all cases a notch of 

 greater or less depth, but the upper is not correctly either notch, fissure, or inci- 

 sion. On the last whorl, near the outer lip, is a tooth, which together form a 

 channel or sinus, and here there is a slight degree of emargination on the lip 

 itself, so that at first appearance there would seem to be much more of a notch 

 than there really is. This is a fine golden-coloured species ; the notch is so deep 

 as to become a fissure, and takes an upward and backward direction. 



243. Pupina mitis, Hinds, Ann. Nat. Hist., vol. x. p. 83. Testa ovali, parva., nitida, brunnea; 

 suturis obsoletis, linea rubra, monstratis ; apertura infra incisa, supra, emarginata, dentata ; fissura recta. 



Inhab. New Ireland ; among the rotten wood of dead and procumbent trees. 



The appearance of the specimens is different as they are living or dead 

 shells. The latter are as transparent as glass, but the living are of a reddish 

 brown, or sometimes of a greyish colour. Nor is the reddish line which follows the 



