170 CALCAEEOUS SPONGES. 



specimens allows of a comparison, appears to be similar. Mr. Davey * has referred 

 this form to CorijneUa {Scyphia) multidicfdata, Mich.f, but the fibres are thinner, 

 and the spicular structure is also of a different cliaracter. 

 Distribution. Lower Green Sand : Farringdon, Berkshire. 



Peronella flabellata, B'Orhigny, sp. 



1850. Hippalimus fiabellatus, D'Orbigny, Prodr. de Pal. vol. ii. p. 97. 

 1861. Disccelia flabellata, From. Cat. raisoune, p. 9. 



18G9. Discmlia flabellata, de Loriol, Mon. de Petage Urgon. p. 66, t. 4. £. 19, 20, 21. 

 1878. Peronella flabellata, Zitt. Studien, III Ab. p. 33. 

 Sponges consisting of several branching cylindrical stems, from 5 to 7 mm. in 

 diameter, attached laterally so as to form fan-shaped expansions. Cloacal tube about 

 2 mm. in width. 



Distribution. Lower Neocomian : Berklingen, Brunswick. 



Peronella furcata, Goldf. sp. (Plate XXXIII. fig. 7.) 



1826-33. Scyphia furcata, Goldf. Petref. 1 Tli. p. 5, t. 2. f. 6. 



1840. Scyphia furcata, F. A. Roemer, Nordd. Kreide, p. 5, t. 2. f. 6. 



1864. Polyendostoma furcatum, F. A. Rcemer, Pal. Bd. 13, p. 39, t. 14. f. 5. 



1871. Epitheles furcata, Geinitz, Pal. Bd. 20, p. 34, t. 8. f. 7, 8. 



1878. Scyphia furcata, Quenst. Petref. Bd. 5, p. 349, t. 132. f. 4-6. 



1878. Peronella furcata, Zitt. Studien, III Ab. p. 33. 



1883. Peronella furcata, Dunik. Pal. Bd. 29, p. 39, t. 39. f. 3, 4. 



The examples of this species in the Museum Collection from Essen are small groups 

 of cylindrical tubes, from 5-5 to 7"6 mm. in diameter, and from 18 to 30 mm. in 

 height, usually springing from an extended base. The tubes generally bifurcate 

 near the basal portion, but they also divide near the summit as well. The cloacal 

 cavity is about 1 mm. in diameter. The lower portion in some specimens shows 

 traces of a compact dermal layer. The fibres are about '12 mm. in thickness, and 

 closely anastomose together. There are no special apertures on the outer surface. 

 According to Dunikowski the fibres are mainly composed of relatively large three- 

 rayed spicules. 



Distribution. Cenomanian : Essen. Upper Green Sand : Warminster. 



Peronella ramosissima, Dunik. 

 1883. Peronella furcata, Goldf., var. ramosissima, Dunik. Pal. Bd. 29, p. 39, t. 39. f. 6. 

 Distribution. Cenomanian (Upper Green Sand) : Essen. 



* Transactions Newbury Field-Club, p. 13. 

 t Icon. Zooph. p. 217, t. 51. f. 9 a, b. 



