Ooel. 1 
CCELENTERATA. 
Hydrozoa and Ctenophora, by Alfred Gibbs Bourne, 
B.Sc. (Lond.), &c. 
Anthozoa, by Sydney J. Hickson, D.Sc. (Lond.), B.A., &c. 
HYDROZOA AND CTENOPHORA. 
1. Agassiz, A. Exploration of the Surface Fauna of the Gulf Stream 
under tho auspices of the Coast Survey, m. Pt. i. The Porpitidcc 
and Velellidcc. Mem. Mus. C. Z. viii. No. 2. 
2. Allman, G. J. Report on the Ilydroida dredged by H.M.S. ‘ Chal- 
lenger ’ during the years 1873-76. Pt. i. Plumulariidcc. Rep. Sci. 
Res. * Challenger/ Zool. vii., with 20 pis. 
The collection of Hydroids brought home by the ‘ Challenger ’ makes a 
large and valuable addition to the number of species hitherto known. Of 
this collection, the family of the Plumulariidcc forms a considerable pro- 
portion. Among these, 4 species, namely, Acantliclla effusa, Acanthocladium 
huxleyi , Aglaophenia macgillivrayi , and Lytocarpus longicornis , have been 
described by Busk from the ‘ Rattlesnake ’ collection, and 1, namely, 
Lytocarpus secundus , by Kirchenpauer, from specimens brought home by 
Semper from the Pelew Islands. The ‘ Challenger ’ also obtained from 
dredgings off the Bermudas a species ( Aglaophenia ramosa) already 
described in the Report on the Ilydroida of the United States’ Explora- 
tion of the Gulf Stream. The only form which can be identified with a 
species occurring in the European Seas is Cladocarpas formosus ; this 
was dredged by the ‘ Porcupine ’ from the Seas lying to the North of 
Scotland, and by the ‘Challenger’ from the Seas of Japan. But by far 
the greater part of the Plumulariidcc brought home by the ‘ Challenger ’ 
consists of species new to science ; while among these, a considerable 
number must be assigned to genera now specially constituted for their 
reception. The author founds the following classification of the group : — 
✓-Gonangia with special) Eleutheroplea. 
\ protective apparatus. j Phylactocarpa. 
■^Gonangia destitute of ] Eleut , lea _ 
t =1. Pr0te0tlV ° (GipnnocJpa. 
f Moveable ne- - ) 
matophores ( Eleutiie- 
always pra- f RorLEA. 
sent. J 
Moveable ne- } 
special 
apparatus. j ~ 
/"Gonangia with special ) Statoplea. 
V protective apparatus. } Phylactocarpa. 
matophores f Cf 1 j 
never pre- f &TATQK.BA. < Gonangia destitute of Statopha . 
gen k \ / special protective L x 
J v apparatus. 
! J Gymnocarpa. 
