Greville^ 071 New Diatoms. 
83 
Triceratium repletum, n. sp._, Grev. — Small; valve with 
nearly straight or slightly convex sides and obtuse angles, 
and large ovate,, minutely punctate pseudo-nodules (pro- 
cesses) ; surface entirely filled with small roundish granules, 
v»'hich become gradually smaller towards the margin, which is 
striate. Distance between the angles '0030'". (Fig. 18.) 
Hab. Barbadoes deposit, Cambridge estate; in slides com= 
municated by C. Johnson, Esq. 
Conspicuous for the very large processes which fill up the 
almost rounded angles, and extend over more than a third of 
the space between the angles and centre. Cellules near the 
centre, about 10 in '001'^ 
Triceratium quinquelobatum, n. sp., Grev.— Valve with five 
obtuse lobes, the sides concave; cellules small, radiating 
from the centre, hexagonal, becoming less towards the 
margin. Distance between the angles '0024/'. (Fig. 21.) 
Hab. Moron deposit, Province of Seville; Rev. T. G, 
Stokes. 
This differs from the hexagonally-lobed T. reticulatum, not 
only in having only five angles (which might not prove of 
sufficient importance), but in the much smaller and more 
regularly hexagonal cellulation, which at the angles passes 
into very crowded, minute puncta. The lobes are also much 
less rounded. 
Triceratium picturatum, n. sp., Grev. — Valve with slightly 
concave sides and obtuse angles containing a few minute 
puncta in the extreme apices ; margin giving off a number of 
very short veinlets, and in the middle of each side a roundish 
impression reaching nearly to the centre. Distance between 
the angles -0032'^ (Fig. 19.) 
Hab. Barbadoes deposit, Cambridge estate; in slides com- 
municated by C. Johnson, Esq. ; extremely rare. 
A species somewhat akin to T. denticulatum, but differing 
essentially in the three middle impressions. The general 
surface has remote, scattered puncta, with smaller and more 
numerous ones between the marginal veinlets and on the 
impressions. 
(a . 
Syringidium. 
Syringidium daemon, n. sp., Grev. — Frustules smooth, 
central portion quadrangular; one of the valves contracted 
into an elongated conical process, the other globose, with two 
truncate, spine-bearing horns and an intermediate spine. 
(Figs. 22—28.) 
Hab, Harbour of Hongkong; J. Linton Palmer, Esq. 
