8 Gcel, 
CffiLENTERATA. 
present, as proved by an examination of Pourtales’ specimen, in Lepto- 
cyathas stimpsoni. TIaplophyllia , Duncania , and Gvoynia are not rugose. 
Paracyathus arcuatus (Lind.) = Asterosmilia prolifer a (Pourt.). 
5. [Duncan, P. M.]. On the Madreporarian Genus Phymastrcea of Milne- 
Edwards & Haime, with a description of a new species. P. Z. S. 
1883, pp. 406-412, 2 woodcuts. 
The genus Phymastrcea must be left between Heliastrcea and the 
genera with entirely soldered or united walls. The genus really stands 
alone in its characteristic method of corallite union. 
6. — ■. Observations on the Madreporarian Family, the Fungidce , with 
special reference to the hard structures. J. L. S. xvii. pp. 137-162 
& 302-318, pis. v., vi., & xiii. Abstr. in J. R. Micr. Soc. (2) iii. 
pp. 666 & 854. 
The first part of this paper contains remarks on the distribution of the 
septa, the columella, the interlocular spaces, and the histology of the hard 
parts of the family Fungiidce. There is also an account of the construction 
of the corallum of Fungia echinata, the arrangement of the hard parts 
of the genus Herpetolitha , and the construction of Halomitra Crustacea. 
These prove to be very typical genera of the Fungiidce. The second 
part deals with the subfamily Lophoserince , and the examples chosen to 
illustrate it have a palaeontological bearing. The genus Lophoseris is 
taken as a typical example ; then the genus Mceandroseris, with collines 
limiting the calices, is considered ; Pachyseris follows as a most abnormal 
form, the collines being in excess ; and Coscinarea, Siderastrcea , Echino- 
pora , and Merulince are finally examined. 
7. . On the Replacement of a True Theca or Wall by an Epitheca 
in some Serial Coralla, and on the importance of the structure in the 
growth of the incrusting Coral. J. L. S. xvii. pp. 361-366. 
8. Fewkes, J. W. Annelid Messmates with a Coral. Am. Nat. xvii. 
pp. 595-597. 
The Annelids found on Mycedium fragile and Porites asirceoides are 
truly commensal. 
9. Greeff, K. Sur les p6cheries de Corail sur la cote del’ile Cap Vert 
San Jago. Arch. Z. exp^iv (2) i. p. xxxii. [Cf. Zool. Rec. xix. 
Ccel. p. 10.] 
10. Gregorio, — de. Coralli Giuresi di Sicilia. Palermo : 1882, 
12 pp. 
11. . , Coralli Titonici di Sicilia. Palermo : 1882, 11 pp. 
[Not seen by Recorder.] 
12. Geikie, A. The Origin of Coral Reefs. Nature, xxix. pp. 107-110, 
woodcut, 124, map. 
After a summary of the views that have recently been put forward by 
Semper, Rein, Murray, and Agassiz, the author says that both barrier 
reefs and atolls must be admitted to be capable of formation without a 
general subsidence. The general phenomena which are considered to 
point to subsidence are three: first, The presence of so many peaks 
