PROTOZOA. 
5B9 
branchlets tapering to a point, with a series of acute divergent tufts of fibres 
on each side (oscules or cells), with a small circular mouth below the pro- 
duced acute outer edge of these tufts ; one of these is placed at the end of 
the branchlet, and the tufts seem to be produced at the base of the previously 
formed ones. C, fusca, sp. n.^ Gray, 1. c. p. 679, fig. 2, Bondy Bay, New South 
Wales. 
Dehitella, g. n.. Gray, 1. c. p. 679. Sponge dichotomously branched, ex- 
panded, growing on a large tuft from a broad, tortuous, creeping base, of a 
dark brown colour, and uniform hard, rigid substance. Stem hard, cylindrical, 
opake, smooth ; branches and branchlets tapering to a point, covered with 
tufts of projecting horny spines on every side; those on the branches often 
placed in sharp-edged, narrow, transverse ridges ; those of the upper branches 
and branchlets close but isolated, and divergent from the surface at nearly 
right angles. This genus differs from Ceratella by the greater thickness and 
cylindrical form of the stem, by the more tufted and irregular manner bf 
growth, and by the tufts of spines (oscules or cells) being more abundant, and 
equally dispersed on all sides of the branches and branchlets. D. atroruhens^ 
sp. n., Gray, 1. c. p. 619, fig. 1, Australia. 
III. RHIZOPODA. 
Diplophiys archeri, n. g. & sp.. Barker, Quart. Journ. Micr. Science, vol. xvi. 
(1868) p. 123. Dr. Barker proposes this genus for a very minute Rhizopod 
met with by him in the county of Wicklow. It is exceedingly minute, nearly 
orbicular or broadly elliptic ; from each of two opposite points there emanates 
a tuft of filiform pseudopodia ; and in the body of the organism is immersed 
a refractive globule of an orange or amber colour. 
Cpstophrys, g. n.. Archer, Quart. Journ. Micr. Science, 1808, vol. xvi. p. 296. 
Body irregular in figure, without test or integument, possessing, immersed in 
its substance, a number (often considerable) of spherical cells, each with nu- 
cleus, nucleolus, and special wall, their contents increasing by self-fission j 
pseudopodia slender and more or less ramified, and occasionally mutually in- 
corporating. C. lidckelia?ia, sp. n., fresh water, co. Dublin. 
Arcella glohosa, sp. n.. Archer, Quart. Journ. Micr. Science, 1868, vol. xvi. 
p. 69, co. Dublin. 
Clathrulina elegans^ Cie. W. Archer exhibited specimens of this species, 
and, believing it to be undescribed, named it Podosplia;ra Imckeliana ; it had 
been found both in Wales and in Ireland. Ibid. p. 
Actinophrys. Archer describes, without naming, a species of this genus 
having certain affinities to A. oculata, Stein. Quart. J ourn. Micr. Science, 
1868, vol. xvi. pp. 70-71. 
Foramimfcra. Dr. Alcock calls attention to the largo quantity of recent 
Foraminifera to be mot with in Dogs’ Bay, Connemara. Broc. Lit. & Phil. 
Soc. Ijivorpool, 1866, vol. v. p. 16. He names some of the more remarkable. 
Ibid. p. 99. For a more complete list of species met with, see Mr. Linton’s 
paper, 1. c. 
Dr. Alcock gives a list of the Foraminifera washed out of the shell of the 
rare Halia priamus from Cadiz. Proc. Lit. & Phil. Soc. Liverpool, 1866, 
vol. V. p. . 
Layma crmata^ P. & J. This species, described from Swan River, is re- 
18G8. [vol. V.] 2 R 
