15 Gael. 
CCELENTERATA. 
Sertularella gigantea^ sp. n., id. {=S. polyzoniaSy yslv. gigantea, Hincks), 
(17 a) p. 330, pi. xiv. figs. 6 & 7, White Sea, on Balani, Flustra, &c., 35 fath.; 
JS. albimaris, sp. n., id. p. 331, pi. xiv. figs. 3-5, White Sea, 20 fath. (Hydro- 
rhiza-formatioii analogous to that of Hydractinid ) ; clarkiiy sp. n., 
id. (17 d), p. 447, pi. xvii. figs. 20-22, Unalaska; pinnata, Clarke, ibid. 
p. 450, pi. xvii. fig. 23. 
According to Norman (20) and Mekesoiikowsky (17 a, pp. 333-336), 
Polyserian hinckai, M. [Zool. Rec. xiv. Ctxil. p. 17] = Diphada mirabilis, 
Verr. ; Norman further identifies it with the genus Selaginopsis, Alim., 
the known species of which are S. mirabilis (Verr.), S.fusca (Johnst.), and 
S. allmanni (Norm.) (= S. fusca^ Alim.) ; a fourth is P. hincksiy sp. n., 
Mereschkowsky {glacialiSy M.), 1. c. p. 337, pi. xv. figs. 1-4. In a later 
communication (17 d), are described : Selaginopsis triserialisy sp. n., 
id.y p. 435, [pi. xvi. figs. 1 & 2, Kamtschatka ; pinnatay sp. n., id. ibid. 
p. 436, pi. xvi. figs. 3 & 4, pacijicay sp. n., id. ibid. p. 438, pi. xvl. 
figs. 5-7, and ihuia, sp. n., id. ibid. p. 439, pi. xvi. figs. 8-10, North 
Pacific; ochotensis, sp. n., id. ibid. p. 440, pi. xvi. figs. 11 & 12, Sea of 
Ochotsk ; decem-serialiSy sp. n., id. ibid. p. 442, pi. xvii. figs. 13-16, North 
Pacific. Mereschkowsky further refers to this genus Thuiaria cylindrica, 
Clarke, and Pericladium bidentatuniy Alim., and gives a synoptical table 
of the known 11 species of the genus. 
Ptychogastria, g. n., Allman. Umbella hemispherical, withlobed margin 
and filiform tentacles ; lithocysts ? ; velum broad ; manubrium short and 
wide, carrying a wide mouth, with quadrangular lips ; inner walls of 
manubrium thrown into eight longitudinal folds, along the free edge of 
which runs a thick convoluted gland-like chord ; eight radiating canals ; 
reproductive sacs oval, large, developed near the middle point of each 
radiating canal. P. polariSy sp. n., Allman (1), p. 290, with figures. 
Discovery Bay. 
Fosstl Hydrozoa, Graptolithid^, and Stromatoporida*]. 
Carter, H. J. On new species of Hydractinidai, recent and fossil, and 
on the identity in structure of Millepora alcicorniSy with Stromato- 
pora ; Ann. N. H. (5) i. pp. 298-311. Id.y Large fossil hydrozoic 
coralla from the chalk; ibid. pp. 412-419. Id.y On Stromatopora \ 
op. cit. ii. pp. 85 & 86. Id.y On the probable nature of the animal 
which produced ihQ Stromatoporidce tvacQdi ihvoughHydractiniayMille- 
pora alcicorniSy and Caunopora to Stromatopora ; ibid. pp. 304-324. 
Dawson, J. W. Stromatopora as distinguished from Millepora. Ann. 
N. H. (.5) ii. pp. 28-30. 
Nicholson, A* H., & Murie, J. On the Minute Structure of Stro- 
matopora and its Allies. J. L. S. xiv. pp. 187-245, pis. i.-iv. 
New genera : Clathrodictijony Stylodictyony Pachystroma. 
Haupt, K. Die Fauna des Graptolithengesteins. Neues Lausitz. Mag. 
liv. 85 pp. 5 pis. 
[Unknown to the Recorder.] 
