98 ART. 1. — I. IJIMA : HEXACTINELLIDA, III. 



The more exact localities are : Maye-no-Yodomi ; Okinose, both 

 Inside and Outside ; Homba ; Gokeba. 



The specimens are usually attached to the dead skeletons of 

 other Hexactinellids, such as Chonelasma calyx, Perlphragella 

 elisce, Hexactinella ventilahrum, etc. In one case (PI. VIII., fig. 

 1) about half a dozen small individuals of the species were seated 

 on a large irregularly branching mass of a dead Hexactinellid 

 skeleton, which on examination proved to be the stalk of an old 

 individual, or individuals, of the same species as the living 

 specimens borne on it. 



The entire configuration of the stalked sponge is quite 

 irregular ; hence the specific name I have given to it. The 

 sponge-body proper may in general be said to be saccular or cup- 

 like and more or less laterally compressed. The wall is moderately 

 thick ; the oscular edge is simple and sharp, but not thin. In 

 size the body may be nearly as large as one's fist. It usually 

 bears, in indefinite positions, bud-like or tubular evagiuations, 

 each bavins; an osculum at the end and leadins; into the common 

 gastral cavity. In other words, the body appears to be composed 

 of variously sized and incompletely divided persons. The number 

 of these in each case is never numerous, being limited to four 

 or five at the most. 



The stalk is firm, branching and anastomosing ; it is at 

 times moderately long, at other times rather short. 



To illustrate with concrete examples, I have shown in fig. 

 2, PI. VIII., a sjDecimen measuring 168 mm. in total height in 

 which the stalk is about as long as the compressed pouch-like 

 body. The latter has a wall about o mm. thick in the thickest 

 part. It seems to have originally borne no less than five buds 

 or secondarily formed 2:>ersons, of which two remain intact while 



