PUOTOZOA. 
844 
Shell fixed by a stem, roundish-oval, with pointed protuberances, the 
extremities of which are perforated for the exits of the granular, unrami- 
fied, non-anastomosing pseudopodia ; sarcodal body (with central nucleus, 
and one or several peripheral contractile vacuoles) suspended in the shell 
by means of the perforating pseudopodia. 
Clathrulina elegans, Cicnk. ; iid. 1. c, pp. 227-235, pi. v. fig 4. Skeleton 
a trellised siliceous ball, in a single piece, mounted upon a longish, tubu- 
lar, distally fibrillate stem ; sarcodal body provided with numerous con- 
tractile vesicles and a central nucleoligerous nucleus ; pseudopodia 
numerous, granuligerous, ramified, and anastomosing. Propagation 
by division, e. g., into three, of which two free themselves through 
the interstices of the shell as ovate flagellate “swarmers.” The stem is 
formed before the shell, as in the young animal of Hedriocystis. Note 
on Clathrulina by lioidy, P. Ac. Philad. 1874, p. 145. 
Sj.nroloeulina hyaiina, sp. u., SchulUe (11, iii.), pp. 132 & 133, pi. vi. 
figs. 14-10, and QuinguelocuUna fuscay Br., id. 1. c. pp. 134-130, pi. vi. 
figs. 19 & 20 (both from the Baltic). 
Several Arctic Rhizojpoda, Foramini/ei'a, and Radiolaria, are referred to 
and figured by Ehrenberg (Zweite Deutsche Nordpolarfahrt, ii. Zoologie, 
pt. 15, pp. 437^467, pis. i.-iv.) ; many of the species are given as new, of 
which diagnoses wore published in MB. Ak. Berl. 1872. IC. Miller 
enumerates the (13 spp.) collected at Spitzbergen (Houglin, 
Reisen, 1. c. p. 202). 
On foraminiferal life in the Southern Sea, and the- relation between 
these organisms and the dilferent character of the sea-bottom deposits 
at different depths, cf. G. Wyville Thomson’s “ Preliminary notes.” 
Nature, x. pp. 142-144, xi. pp. 95-97, & 110-119, or P. R. Soc. xxii. 
pp. 423-428 & xxiii. pp. 32-49, pis. i.-iii. (especially on “ Globigerina- 
ooze ”). 
Thirty-one varieties of Lagena vulgaris. Will., found (together with 
many other Foraminifera, Polycystinea, Diatoms, &c.) in a packet of 
mud from a depth of 1080 fathoms, 10 miles south of Sandalwood 
Island, are described and figured by R. Jones (9). A paper by D. 
Robertson on the recent Foraminifera of the Firth of Clyde, read 
before the Geological Society of Glasgow, April 16th, 1874, has not been 
seen by the Recorder. A note on the “ Bathybius ” (juostion ; Q. J. Micr. 
Sci. xiv. pp. 97-99. An organism of a still lower type than Bathybius 
{Pro tobathy bills robesonii), discovered by the “Polaris ” Arctic Expedition 
off Grinnell Land, is announced in Nature, ix. p. 405, quoting advanced 
sheets of the Report of the Secretary of the U. S. Nav 3 ^ 
Fossil Rhizopoda and Allied Forms. 
H. B. Brady : On a true carboniferous Nummulite ; Ann. N. H. (4) 
xiii. pp. 222-230, pi. xiii. (abstract, J. Zool. iii. pp. 336-340). L. G. 
Bornemann : Ueber die Foraminiferen-gattung Involutina (Z. geol. 
Ges. xxvi. pp. 702-740, pis. xviii. & xix.) (two new genera, Silicina 
and Problematina). R. Etheridge : On the occurrence of Foraminu 
fera in the carboniferous limestone of the east of Scotland (Tr. Geol. 
