324 POLYZOA INFUNDIBULATA. 



" sometimes on one side and sometimes on the other " (0. W. Peach), 

 and when it is broken off a small hole marks where it had been. 



33. L. SPINIFERA, cells ovato-globose, roughish, contracted in 

 front ; aperture circular with a sinus in the upper lip and a 

 mucro behind it, the margin with from three to Jive spines on its 

 lower side. A. H. Hassall. 



PLATE LVII. FIG. 6. 



Lepralia ciliata, Hassall in Ann. and Mag. Nat. Hist. vi. 171 ; and vii. 367. pi. 9, 

 fig. 2. 



Hob. " Rather abundant on stones, shells, and fuel ; Dublin 

 Bay," A. H. H 'assail 



This species closely resembles Lep. ciliata ; indeed I can perceive 

 little or no difference excepting what exists in the different shape 

 of the aperture, which is abundantly characteristic. The walls of 

 the cells are thin, silvered, and roughish, sometimes punctured, but 

 this appears to be the effect of drying. The mucro in front varies 

 in length, and is often hollow or perforated. The spines of the 

 aperture are longer than its diameter. 



Lep. spinlfera is probably a rare species. I have seen no speci- 

 men but the one I owe to the kindness of Mr. Hassall. 



34. L. TRISPINOSA, cells radiating from a centre, horizontal, 

 ovate, ventricose, rough ; the aperture small and circular, 

 sinuated on the proximal and armed with three long spines 

 on the distal margin. G. J. 



PLATE LVII. FIG. 7. 



Discopora trispinosa, Johnston in Edin. Phil. Journ. xiii. 322. Berenicea trispinosa, 

 Johnston in Trans. Newc. Soc. ii. 268. Lepralia trispinosa, Johns. Brit. Zooph. 

 280, pi. 34. fig. 5. Couch Corn. Faun. iii. 118. J . Mocgillimay in Ann. and 

 Mag. N. Hist. ix. 467. 



Hob. On shells from deep water, rare. Berwick bay, G. J. Coast 

 of Cornwall, G. W. Peach. On a root of Laminaria digitata, near 

 Aberdeen, J. Macgillivray. 



Crust thin, circular, adherent, yellowish, or of a silvery white 

 colour, thickly sprinkled with minute yellow dots : cells in rows 

 radiating from the centre, horizontal, immersed, rough or subgra- 

 nular, the apertures raised, round, cleft, but not deeply, above, and 

 below armed with three stout and long spines of which the middle 

 one is usually the longest. The margin of the crust is a thin pel- 



