268 APPENDIX. 



phana in the form of its lower tentacles. The muzzle is short 

 and broad, strongly tinged with brown on the centre and up to 

 the head. The tentacles are all four stoutly subulate and white. 

 The eyes are placed far back, rather close together, and are sur- 

 rounded by pale rings. The anterior angles and extremity of 

 foot are obtuse. 



Vol. iii. p. 155. Jeffreysia globularis. Jeffreys, MS. 



Obliquely orbicular, strongly umbilicated, 



Plate CXXXIII. fig. 5. 



Were it not for the membranaceous operculum, whose nucleus 

 is lateral (adjacent to the middle of the pillar lip), this minute 

 and fry-like species might readily be taken for a young Valvata. 



It is obliquely orbicular, excessively fragile, and of a transpa- 

 rent shining and somewhat iridescent bluish white, but more 

 usually is coated with an olivaceous crust; the surface is nearly 

 smooth, exhibiting only some indistinct wrinkles of increase, 

 chiefly apparent near the outer lip, in the few individuals we 

 have examined. The three rounded volutions, which compose 

 the shell, are of quick increase, and swell out abruptly, from the 

 simple, yet profound, suture, both above and below. The spire 

 occupies from one-third to two-fifths of the dorsal length ; the 

 penult turn is more than twice as broad as it is high ; the apex, 

 which is symmetrically coiled, is blunt or retuse. The surface of 

 the lower disk is much rounded, and pierced by a large umbi- 

 licus, whose capacious mouth is not spirally sculptured, but is 

 more or less wrinkled lengthways. The periphery of the body is 

 bluntly rounded. The aperture, which projects both laterally 

 and at the broadly rounded anterior extremity, occupies about 

 four-sevenths of the total length, and fully one-third of the 

 ventral area : it is of a rounded ovate figure, as the body does 

 not project into the mouth. The lips, which are united at both 

 ends, so that the peristome is entire, are neither thickened nor 

 reflected ; the outer one is much arcuated, and simple edged ; 

 the inner one is elongated, erect, and subarcuated. The breadth 

 is scarcely the twelfth of an inch. h. few specimens were taken 



