278 
Z. ASCIDIOIDA. 
Lepralia. 
Cellepora oitida, Fabr. Faun. Groenl. 435. Bose , Vers, iii. U8. Lam. 
Anim. s. Vert. 2de edit. ii. 259. Corail. 38. Berenicea nitida, Flenu 
Brit. Anim. 533- La B. brillante, Blainv . Actinol. 445. 
Hob. On shells, rare, Dr Fleming. In Berwick Bay on Patella 
cserulea, G. J. 
Crust spreading- circularly, closely adherent, rather thin, greyish- 
white, calcareous ; cells contiguous, in radiating rows, large, subalter- 
nate, ovate, ventricose, silvery, the walls fissured with 6 or 7 cross 
slits which meet on the mesial line ; aperture subquadrangular, de- 
pressed, terminal ; anterior to it there is often found a globular smooth 
pearly oviferous operculum with a round even aperture. The re- 
markable structure of the cells renders this one of the most interesting- 
species under the microscope. There is sometimes an appearance of 
a spine on each side of the lower angle of the mouth, which is mere- 
ly the commencement of the walls of the next cell. 
3. L. cocci nea, cells ovate , granulous , the aperture with a 
short tooth- like process above the superior margin . G. J. 
Plate xxxiv. Fig. 1, 2, 3. 
Cellepora coccinea, Corail. 40 Berenicea coccinea, Lam. Anim. s. 
Vert. 2de edit. ii. 259. Johnston in Trans. Newc. Soc. ii. 267, pi. 12, 
fig. 5. 
11 ab. On rocks near low water-mark, and on the roots of Lami- 
naria digitata, common on the coast. 
The spots formed by this species are often an inch or upwards in 
diameter, the crust closely adherent, thin, roughish to the naked eye, 
generally of a fiesh-red or purplish colour, but sometimes pure white. 
The cells are disposed in adjacent rows, either opposite or subalter- 
nate, and lie upon the crust ; they are ovate, granulated or frosted, 
and, when dry, sometimes appear to be perforated with minute holes. 
Above the aperture, and a little removed from the margin, there rises 
up a blunt white tooth or mucro, but the margin itself is not tooth- 
ed : the aperture is roundish, emarginated above, terminal, and on 
each side of many of them, in some specimens, there is a small trian- 
gular slit, which seems to be the aperture of an abortive or partially 
developed cell. Many of the cells are usually covered with a large 
pearly- white striated operculum. 
4. L. variolosa, crust punctured or sometimes frosted only ; 
the cells immersed , cylindraceous, raised anteriorly , with a plain 
semioval aperture . G. J. 
Plate xxxiv. Fig. 4. 
Hah. On shells and stones in deep water. Scarborough, Mr Bean . 
Berwick Bay. 
