64 



TT. 1). Lang — The RejAant Ekid Polyzoa. 



the beginnings of cylindrical brandies which, if present, would link 

 this form with the 'genus' Nodelea. 



The pieces of matrix adhering to the fossil are a greensand 

 resembling that of Warminster, and the state of preservation of the 

 fossil resembles that of specimens of polyzoa from that place. The 

 probability, then, of the specimen being of Cenoraanian age from 

 the Upper Greensand of Warminster is sufficient to warrant the 

 record of its occurrence. 



Semimultelea Dixoni,^ ep. nov. (Figs, 4, 12.) 



A specimen of an Eleid (B.M. D 7845), found by Messrs. C. P. 

 Chatwin and T. H. Withers, and presented by them to the British 

 Museum in October, 1905, exhibits the zoarial characters of the 

 * genus ' Semimultelea. It is an incrustation of two or three super- 

 imposed laminro ; there are no avicularia. It differs from all the 



cz 



Fig. 12. — Part of the zoarium of the t}-pe-specimen of Semimultelea Dixoni, sp. uov. 

 (See explanation of figure at the end of the text, p. 68.) 



other species of Semimultelea in the great size of its apertures, 

 which are about -33 mm. in diameter. The apertures are sub- 

 triangular to nearly circular, resembling in this respect those of 

 S. irregularis, d'Orbigny. The aperture is surrounded by a low, 

 rather thin rim, which is not (as in the species just mentioned) 

 thickened distally. Numerous closed zooecia occur. The apertures 

 are very irregularly distributed, being generally frequent, but rarer 

 in some places. In some parts of the zoarium the zooecia are 



1 After Frederic Dixon, author of " The Geologj' of Sussex." Dixon's collection, 

 acquired by the British Museum m 1850, contains many tj-pe- specimens of Chalk 

 Polvzoa. 



