CELLErORID.^ I LEPRALIA. 307 



8. L. ANSATA, cells suhglohose, punctulated ; the aperture 

 circular, smuated on the proximal side, even and plain, loith a 

 wide open auricle on each side. 



Plate LIV. Fig. 12. 



Hab. — On a slaty rock sent from Cornwall by C. W. Peach. 



Crust circular, rather thick, roughish, closely adherent, of a dull 

 white colour : cells of medium size, distinct but contiguous, ovato- 

 globose, roughish, very minutely punctured, the aperture circular, 

 with a well defined deep sinus above ; and behind it there is a dorsal 

 mucro on most of the cells. On each side of the aperture a hollow 

 auricle projects forwards ; and, viewed in front, these auricles have a 

 miniature resemblance to the ears of a fox or cat. 



Although the cells are punctulated, I place this rare species next 

 to Lepralia Hyndmanni, of which it may possibly be merely a state 

 or variety. Their separation depends on the presence or absence of 

 the spinigerous tubercle and of the lateral auricles, but the value of 

 these characters is still undetermined ; whereas the form of the aper- 

 ture, and the shape of the cells, which seem to be certain characters, 

 are alike in both species. 



9. L. ovalis, crust glistening ; cells icell defined and oval, 

 the aperture circular, oblique^ wide, with a mucro on the upper 

 lip, and two spines on the lower margin. A. H. Hassall. 



Plate LVI. Fig. 1. 

 Lepralia ovalis, Hassall in Ann. and Mag. Nat. Hist. ix. 413. 



Sab. — On dead bivalve shells and rocks, rare. 



" This is a distinct, and, I imagine, a very rare species, as I have but 

 one Irish specimen attached to a piece of granite, procured at Kings- 

 town. From L. trispinosa of Dr. Johnston, a species with which I 

 am not acquainted, it differs in being very rarely provided with 

 three spines, and in the absence of the spout-like excavation repre- 

 sented in the figure of that species ; while from L. inimersa it is at 

 once known by the much larger size of the cells, discernible plainly 

 by the unassisted eye, as well as by other characters less obvious. 

 This is likewise an English species, being found at Burnham, Nor- 

 folk."—^. R. Hassall. 



A beautiful and distinct species, more nearly related to Lep. pedi- 

 ostoma, and, especially, to L. verrucosa, than to the species mentioned 



x2 



