ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
745 
Montagui of Flemming, the Colochirus Andersoni of Lampert, and the 
G. Lacazei of Herouard. 
Ccelentera. 
Gyractis.* — Under this name Prof. T. Boveri describes a radially 
symmetrical Actinian from Ceylon, for which he proposes the group- 
name Holactinise ; this group may be defined as containing Actiniaria 
which exhibit a perfect radial symmetry, and have the septa arranged in 
pairs ; the septa of each have longitudinal muscles on their inner and 
transverse muscles on their outer sides. New septa are developed in 
pairs in the intersepta. The mouth is round and there are no sipliono- 
glyphes. The mode of derivation of this group from the Edwardsise is 
still obscure ; it is, however, the last joint in a series which has been 
derived from a bilaterally symmetrical animal and has become quite 
radial. Two species of Gyractis are described. 
Corals from Indian Seas.f — Dr. A. Alcock makes a welcome addition 
to our scanty knowledge of the coral-fauna of the seas within the limits 
of the Indian peninsula. Twenty-six species are enumerated, of which 
Paracyathus cavatus, P. porpJiyreus , Heterocyathus wood-masoni, Bisco- 
troehus investigatoris, Polycyathus andamanensis , Balanophyllia scabra , 
Eupsammia regalis , Heteropsammia apkrodes , Cycloseris mycoides , Diaseris 
fragilis , and Bathyactis stephanus are new ; the last-named came from 
678 fathoms in the Bay of Bengal. 
Every specimen of R. aphrodes was found to be provided with a com- 
mensal sipunculoid worm, and with live specimens it was observed that 
the worm was able to propel the coral in a rapid series of short, jerky, 
spiral movements. These movements were performed with great ease, 
so that this is a true case of commensalism, in which the worm serves 
the polyp as a locomotor agent, while the polyp, by its stinging organs, 
protects the worm. 
Muriceidae.J — Mr. T. Hedlund, we learn, at this late date, has 
published notes on Acanthogorgia aspera , A. inermis sp. n., EcJiino- 
muricea Peter seni sp. n., both from Hong Kong, and E. philippinensis. 
It is a pity that the distribution of this paper should have been so long 
delayed. 
Revision of the Forskaliid9e.§ — M. M. Bedot makes a revision of 
this family of the Siphonophora, in which he gives a full account of the 
work of preceding writers, shows there is no need for the genus ForsJca- 
liopsis, suggests that BatJiyphysa belongs to a distinct family, and gives 
a list of the species which he recognizes in the genus Forskalia. 
Porifera. 
Structure and Classification of Calcarea Heterocoela.|| — In the fifth 
part of his “ Studies on the Comparative Anatomy of Sponges,” Dr. A. 
Dendy deals with the Heterocoelous form of Calcareous Sponges. As 
to the anatomy and histology he does not so much offer what is new as 
* Zool. JB. (Systematik &c.) vii. (1893) pp. 241-53 (1 pi. and 3 figs.), 
f Journ. Asiat. Soc. Bengal, lxii. (1893) pp. 138-49 (1 pi.). 
t Bill. Svensk. Yet. Akad. Hdlgr., xvi. IV. No. 6 (1890) 19 pp. (3 pis.). 
§ Rev. Suisse de Zool., i. (1893) pp. 231-54. 
|| Quart. Journ. Micr. Sci., xxxv. (1893) pp. 139-257 (5 pis.). 
