462 G. HERBERT FOWLER. 



collection of thin sandy discs, frona 0"3 to 0*4 of an inch in 

 diameter, with a slight central prominence ; for these proved, 

 on subsequent examination, to contain an entirely new type of 

 Actinozoon, extraordinarily flattened in form and entirely 

 destitute of tentacles. Dr. Carpenter, by whom this curious 

 organism will be described, has assigned to it the name of 

 Ammodiscus Lindahli. Further on, off Cadiz, the same 

 curious form was obtained in depths of 227 and 386 fathoms ; 

 and on the next page of the report it is again stated that the 

 Ammodiscus will be worked out by Dr. Carpenter." 



" Apparently nothing further has been published concerning 

 this undescribed Actiniarian. Although Dr. Carpenter devoted 

 much time to the investigation of its structure, and made a 

 large set of microscopical preparations of its various parts, 

 and although he frequently mentioned it and dwelt on its im- 

 portance to friends, and to myself amongst the number, he 

 never found time to write an account of his results for pub- 

 lication. He, however, did prepare two quarto plates in his 

 scrupulously careful manner of excellent figures of the animal, 

 both entire and dissected in various ways, so as to display its 

 most important internal structure and arrangement. Unfor- 

 tunately he left no manuscript of any kind — not even a descrip- 

 tion of the plates ; and the only clue to his views as to the 

 component structures is to be derived from the series of micro- 

 scopical preparations,^ which is fully labelled throughout. The 

 two plates, the whole series of preparations, and a considerable 

 supply of specimens of the animal in spirits and in the dry con- 

 dition were placed in my hands by Dr. Carpenter's family, with 

 a request that I should work out a memoir from these mate- 

 rials embodying his results for publication, adding from my 

 own observations anything that might be required." 



'^Difficulties of manipulation: sand." 



^' It is singular that Dr. Carpenter applied the term Ammo- 

 discus to this new form, as this name had been conferred on an 

 arenaceous Foraminifer in 1861. It is necessary that a new 

 generic title should be adopted, and I propose to call the form 

 ' These have not come into my possession. — G. H. F. 



