2 Rev. T. Hincks’s Contributions towards 
ratively small in amount; but it has yielded no less than 
ninety species, of which twenty-three appear to be undescribed. 
I say appear to be undescribed ; for I confess that in several 
cases I have had the greatest difficulty in making out the 
forms intended by previous writers ; and in the interest of all 
students I venture to protest against meagre diagnoses without 
fieures as a serious Injury to science. 
The greatest depth from which dredgings were obtained 
seems to have been 40 fathoms: a large proportion of the 
species were taken in the neighbourhood of Curtis Island. 
Of the ninety species included in the collection, twenty-two 
(or about a quarter) are Kuropean forms and occur on our 
own coasts. ‘They are as follows :— 
Eucratea chelata, Lenn. Rhynchopora bispinosa, Johnst. 
Cellaria fistulosa, Linn., var. Porella concinna, Bush. 
Membranipora lineata, Linn. Smittia Landsborovii, Johnst., var. 
Micropora coriacea, Esper, var. reticulata, J. Mac Gill., and var. 
Cribrilina radiata, Moll. —— trispinosa, Johunst. 
Microporella ciliata, Padl., vars. Stomatopora Johnstoni (P), Heller. 
Malusii, dud. dilatans (?), Johnst. 
Schizoporella Cecilii, Aud. Idmonea atlantica, EZ. Forbes. 
biaperta, Michelin. Diastopora suborbicularis, Hincks. 
Hippothoa divaricata, Lame. patina, Lamk. 
distans, MacGill. (=H. fla- Lichenopora hispida, Fleming. 
gellum). 
The most interesting special points determined by means 
of Capt. Warren’s collection are undoubtedly the structural 
peculiarities of Membranipora radicifera, n. sp., and Cribri- 
lina ferox, MacGill., which are noticed in the account of 
those species. 
Suborder CHEILOSTOMATA. 
Family Cellulariide. 
CABEREA, Lamouroux. 
Caberea grandis, n. sp. 
(Pl. IIL. figs. 4, 4a, 40.) 
Zoarium dichotomously branched. Zowcia in from three to 
six rows, subquadrate; aperture subelliptical, sunk, the inner 
surface of the cell-wall minutely roughened ; two spines on 
the outer margin above, and one on the inner; operculum 
with avery broad peduncle, entire, pretty regularly oval, with 
a loop-like marking across the centre; on the outer edge of 
the marginal cells, a little below the vibraculum, a small 
sessile avicularium, elongate, tapering off to a point below, 
