]60 REPORT— 1869. 



the formation of the St. Cassian and the Liassic and the Lower Oolitic deposits ; 

 and it is impossible to deny a genetic value to these oft-repeated structural 

 phenomena. 



One of the Thecosmilice from the Inferior Oolite at Crickley, which I have 

 named T. Wrighti, is very closely allied to the Lower-Liassic species. 



It is interesting to find the genus C'ycloJites represented in the Inferior 

 Oolite by two well-marked species, one of which is like the rest of the forms 

 of the genus in shape, and the other is exceptional in its trochoid form. This 

 last species has, however, all the characteristics of the genus. The Cyclolites 

 are extinct ; they flourished in the Lower Cretaceous seas, and lasted during 

 the Miocene. MM. Milne-Edwards and Jules Haime (Hist. Nat. des Corall.) 

 mention that the genus originated in the Jurassic age, but they give no evi- 

 dence. The species now under consideration are, however, clearly from the 

 Inferior Oolite. 



A form belonging to a new genus of the Fimr/idce was found by Mr, 

 Mansel at East Coker in the Inferior Oolite. In general shape and the 

 arrangement of the calices the specimen resembles Bhnorjyhastrcea ; but the 

 synapticulae between the septa and costee necessitate its association with the 

 Fungidce. There is a central calice, and the others are in a circle around it, 

 being separated by long horizontal septo-costal prolongations ; the whole 

 is surrounded by an epitheca, and forms a turbinate shape, the free surface 

 being flat and circular. The genus foreshadows the genera Cyaihoseris and 

 Troehoseris of the Lower Chalk. 



There are several new species of the genus Thamnastraa ; T. Browni, nobis 

 (MS. sp.), is remarkable for having in some specimens a long stalk surmounted 

 by a knob-shaped head. The calices are small on the stalk, and A'ery large 

 on the head ; so that when the form is examined before it is mature, there is 

 a danger of producing two species instead of one. The stalk often attains the 

 height of 3 or 4 inches. In other specimens there is no stalk, and the knob- 

 shaped corallum is sessile. 



A large specimen of Thamnastrc^a Manseli (MS. sp.). Inferior Oolite, is 

 pedunculate, short, and verj' expanded superiorly ; the epitheca is weU pre- 

 served, and the endothecal dissepiments can be seen. This is a very satisfac- 

 tory species, and I have had it very carefully drawn, so that the suspiciously 

 synapticular endotheca can be proved to be really dissepimental. 



A specimen of Cladopliyllia Baheana, d'Orb., sp., figured in the inedited 

 plates of the PalaBontographical Society at my instance, is remarkable from the 

 disposition of the corallites to combine and form serial and fissiparous calices 

 as in Thecosmilia. 



The new species of the genera Cyathophora and Isastrcea are well marked, 

 and that of the last is a dendroid form. 



MM. Milne-Edwards and Jules Haime collected and described the following 

 Oolitic species* in their 'Monograph' (Pal. Soc), 1851 : — 



Portland Stone. 6. Calamophylla Stokesi, Ed. # H. 



1. Isastrtea oblonga, i^/ewmr^r, sp. 7. Cladopliyllia cirspitosa, Com. cf-PAi7., sp. 



8. Goniocora socialis, Eomer, sp. 

 Coral Bag. 9. Isastra-a explanata, Goldfuss, sp. 



1. Stylina tubulifera, PMllvps, sp. 10. Greenoughi, Ed. <.\- H. 



2. De la Bechi, Ed. ^- H. H. Thamnastraia arachnoides, Parkins., sp. 



3. Montlivaltia disp'ar, Phillips, sp. 12. concinna, Goldfuss, sp. 



4. Thecosmilia annularis, Fleming, sp. 13. Comoseris irradians, Ed. S; H. 



5. Ehabdophyllia Edwardsi, M'Coy, sp. 14. Protoseris Waltoni, Ed. 4' H. 



* There are three species common to the Great Oolite and the Inferior Oolite, and one 

 is common to the Coral Rag, the Great and the Inferior Oolite. The yarieties of Thecos- 



