31? 



XX. PORIFERA. 



By E. KIRKPATRICK. 



The three specimens of Antarctic Sponges which were obtained 

 represent the following three species : — 



Leucosolenia variabilis, Haeckel. 

 Halichondria panicea, Johnston. 

 Halichondria sp. 



LEUCOSOLENIA VARIABILIS. 



1872. Ascetta variabilis, Haeckel. Kalkschwanmie II., p. lOG. 



1896. Leucosolenia variabilis, Mincliiu, Ann. Mag. Nat. Hist. (6), XVIII., 

 p. 350. 



The specimen consists of a single tube about .3 mm. in length 

 and • 5 mm. in breadth, growing in a crevice formed by the coils of 

 Spirorbis antarctica. 



The Antarctic specimen shows slight variations from the Medi- 

 terranean form, the larger monaxons, with double-edged lance-shaped 

 terminations, being thicker, and the smaller monaxons much less 

 abundant in the former. With respect to the arrangement and 

 general characters of the tri- radiates and quadri- radiates the 

 Antarctic specimen exhibits no noteworthy variation. 



Locality. — Cape Adare, 18 fathoms (dredged). Sea temperature 

 29° Fahr. 



Distribution. — Arctic Ocean (Barent's Sea) ; Norway ; Great 

 Britain and Ireland ; Mediterranean ; Cape Town ; Cape Adare. 



HALICHONDRIA PANICEA. 



1842. Halichondria panicea, Johnston, 'Piiit. Sponges,' p. 11 1, Pis. X. and XI., 



fig. r,. 



The specimen consists of a friable amorphous fragment of pale 

 yellow colour. The skeleton, as in the case of specimens from 



