NOTES ON BRITISH FERNS. 241 



BoTHRiocEPHALUs micTOcephalus. 



The intestines of the sun-fish contained an immense num- 

 ber of this species ; the longest was upwards of 3 feet in 

 length : colour white : the widest part of the body was a little 

 more than 3 lines. Several of them lived in water for twenty- 

 four hours. 



The head is small, triangular, or sagittate, terminating 

 anteriorly in a little papillary eminence. The bothrii, or 

 depressions upon the head, are two in number, of an oval 

 shape, wider posteriorly ; there is no neck ; the anterior 

 articulations are funnel-shaped ; they gradually become 

 longer, then shorter, and in some individuals the most poste- 

 rior articulations are merely transverse rugce. The articula- 

 tion which terminates the body is smaller than the others. 



Rudolphi describes this species as being found only in the 

 Orthagoriscus mola. 



Anthocephalvs elongatus. 



This species was discovered by Cuvier, in the liver of the 

 Orthagoriscus mola : he created a new genus for it, which he 

 called Floriceps ; but as it agrees in every respect with the 

 genus Anthocephalus established by Rudolphi, it is now 

 placed there. 



The whole surface of the liver was marked with the cysts 

 of this species, the longest which I was able to extract was 

 7 inches, and it was not complete. 



The body of the animal is soft, flattened in parts, in others 

 nearly cylindrical : it terminates posteriorly in a caudal vesicle ; 

 the head is provided with two ear-shaped depressions, and 

 four retractile armed tentaculm. 



Rudolphi has found this species in the liver and mesentery 

 of the Orthagoriscus mola, in the mesentery of the Centrono- 

 tus glaucus, and also in the Scicena aquila. 



Art. VII. — Afeiu Notes on British Ferns. By Edward Newman, 

 Esq., F.L.S., &c. 



. Sir, 



The publication of my ' History of British Ferns' 

 has been the means of bringing me a very valuable and 

 somewhat voluminous coiTcspondence, touching botany gene- 

 rally, and ferns more particularly. A great portion of the 



