ANTHOZOA. 
Goel. 11 
growth of the genus MonticuUpora. The author defends the Coelenterate 
position of the genus against the Polyzoan position urged by Dr. Lindstrom. 
The presence of mural pores, as in Faiwsites, a dimorphism of corallites 
and the presence of tabulae, as in Ileliopora, point to the Monticuliporidce 
being an ancient group of Alcyonarians allied to the Helioporidoi. The 
relations of MonticuUpora with Chcctetes, Stomopora, Tetradium, Ceramo- 
pora, and Ileterodictya are discussed, and the following subgenera de- 
scribed : Heterotrypa, Diplotrypa, Monotrypa^ Prasopora^ and Perono- 
pora. 
6. . On some new or imperfectly known species of Corals from 
the Devonian Rocks of France. Ann. N. H. (5) vii. pp. 14-22, with 
1 pi. 
6. . On the structure of the skeleton of Tuhipora musica, and of the 
relation of the genus Tuhipora to Byringopora. P. R. Soc. Edinb. 
1880-81, pp. 219-229. 
The author disputes the relationship of these two genera, and places 
Byringopora amongst the Zoantharia perforata. 
7. , & Etheridge, J., Junr. Monograph of the Silurian Fossils 
of the Girvan district of Ayrshire. Anthozoa, Fasc. i. pp. 25-97, 
pis. i.-iv. ; Fasc. iii. pp. 241-282, pis. xvi.-xviii. 
8. Ridley, S. 0. Coelenterata : in Account of the Zoological Collections 
made during the Survey of H.M.S. ‘Alert,’ in the Straits of 
Magellan, and on the coast of Patagonia. P. Z. S. 1881, pp. 101-107. 
9. Studer, T. Beitrag zur Fauna der Steinkorallen von Singapore. 
MT. Ges. Bern. 1880 [1881], pp. 15-53, 18 woodcuts. 
10. Tomes, K. F. Description of a new species of Coral {Thamnastrma 
walfordi), from the middle Lias of Oxfordshire. From the Proceed- 
ings of the Geological Society. Ann. N. H. (5) viii. p. 156. 
11. YERkiLL, A. E. On the Zoological Affinities of Halysites. Am. 
J. Sci. (3) xxi. p. 508. Also in Ann. N. H. (5) viii. p. 72, and Zool. 
Auz. iv. p. 342. 
In a fragment of Halysites, several inches across the large tubes con- 
tained twelve well-developed and regular septa, extending to the centre. 
This genus is therefore Madreporarian. 
12. Wilson, E. B. The early stages of Renilla. Am. J. Sci. (3) xx. 
pp. 446-449. 
The young polype of Renilla is ciliated, and at first swims actively. 
Two slight dentations in the middle represent the first two polypes. The 
two upper mesenteries are the longest, reaching as far as the zooids. A 
median zooid appears later, which becomes the central zooid, by which the 
water is discharged. Each rudimentary zooid, except this one, multiplies 
to form a group. The colony is bilaterally symmetrical up to a late 
stage. 
1881. [vOL. XVITI.] T ) 3 
