180 A MONOGEAPH OF THE 



Colour. — Alive, yellow ; dried, buff yellow. 

 Locality. — Coast of Devon, Mrs. Griffiths. 

 Examined. — In the dried state. 



The above description is from the original type specimen 

 of Montagu, in the possession of Professor Grant. The 

 sponge is one and a half inch long, three fourths of an inch 

 wide, and not exceeding half an inch in height. The mam- 

 mseform processes are irregular in form, compressed towards 

 the base, and rarely exceeding two or three lines in height, 

 and internally they are of the same structure as the body of 

 the sponge. The under surface of the sponge is nodulous 

 and uneven, and 1 could not distinguish the point or points 

 of attachment, if there be any such. The sunken portions 

 of the under surface are furnished with as many oscula as 

 the upper one, where the oscula are dispersed between the 

 bases of the mammseform processes, and it is evident that 

 the species, in this case, is not a coating one. 



The spicula present much irregularity of size and form, 

 and are occasionally, but rarely, spinulate ,- in the mammse- 

 form processes they radiate irregularly towards the surface, 

 from immediately beneath it, but not in right lines from the 

 axis of the process. 



In a second specimen in the cabinet of the late Mrs. 

 Griffiths the spicula are somewhat longer than in the type 

 sponge, and the mammaeform processes do not appear, but 

 the surface is extremely rugged and uneven. The mammae, 

 as a character, although so striking in the type specimen, 

 can scarcely be considered as necessarily a specific one, and 

 may probably, when we know more of this species, be en- 

 tirely dispensed with. As in the first specimen, there is no 

 distinct base to the sponge, but the under surface is filled 

 with small stones and shells partially imbedded. The spe- 

 cimen has twice the area of the type one, but is not quite 

 so thick. 



In a third specimen, sent to me for examination in 1859 

 by the Rev. A. M. Norman, the mammseform processes were 

 large and numerous, some of them exceeding half an inch 

 in height, and usually had a large terminal osculum, with -a 



