FROM HALDON. 29 



The exotheca is inclined and very strongly developed. 



Height of the corallum, 1^ to 1| inch. Length of the calice, 2^ to S^^th inches. 

 Breadth of the calice, ^^ths to li^th inch. 



Locality. Haldon. In the Collection of WiUiam Vicary, Esq., F.G.S., Exeter. 



This fine species is strongly Placosmilian, and might be taken as the type of the 



Genus — Peplosmiha. 

 Peplosmilia depressa, E. de Fromentel. PI. X, figs. 8 — 10' 



The corallum is not very tall, and shows traces of epitheca. 



The calice is shallow and ronnd. 



The septa are well developed and thin. There are more than four cycles, and 

 probably a fifth exists in full-grown individuals. 



The columella is very thin and narrow. 



Height, \ inch- Breadth of calice, i^ths inch. 



Locality. Haldon. In the Collection of William Vicary, Esq., F.G.S. , Exeter. 



M. de Fromentel, 'Pal. Franp., Terr. Cret./ pi. 46, fig. 1, 1863, and page 241, 

 states that his specimens came fi'om the Upper Greensand of Mans. 



The specimen from Haldon is fragmentary, and its columella is defective, but it is 

 so like M. de Fromentel's delineation of Peplosmilia depressa that there is no doubt aboiit 

 its being of that species. 



Division — A str^ ace^ . 



GeilUS ASTROCCENIA. 



Astroc(enia decaphylla, Ed. and H. PI. XI, figs. 1 — 6. 



This species, described by MM. Milne-Edwards and Jules Haime ('Ann. des 

 Sci. nat.,' 3me serie, t. x, p. 298, 1849) was subsequently named Astreea reticulata by 

 D'Orbigny (1850), and was noticed as Astroccenia maynifica by Reuss in his great work 

 on the Corals of Gosau (' Denkschr. der Wien Akad. der Wissensch.,' t. vii, p. 94, pi. 8, 

 figs. 4—6, 1854). 



Reuss's admirable delineation of the species enables the British form to be recognised 



