168 ART. 7. 1. IJIMA : HEXACTINELLTDA, IV. 



a table showing for each species or specimen certain noteworthy 

 points from its characters). 



STAUROCALYPTUS RŒPERI (F. E. Sch.). 



PL XIV., figs. 26-32. 



Rhabdocalyptm Rœperi. F. E. Scpiulze, '86, p. 51. '87 

 (!), p. 1Ö8; PI. LXV. '97, p. 553. 



Slaurocalyptus rœperi, I. Ijima, '97, p. 55. '98, p. 53, 



The following account of this species is here introduced 

 mainly to record certain points which go in a measure to sup- 

 plement the excellent description we have already received from 

 F. E. Schulze, the original describer, and which seem to be of 

 importance for a sharp distinction between this and certain other 

 species closely resembling it. 



To the liberality of the investigator jnst mentioned I am 

 indebted for a gift of two slide-preparations made from the type- 

 specimen, and on which my own observations have been solely made- 



The species was obtained by the " Challenger " to the south 

 of Puerta Buono in Patagonia (depth, 731 m.). It should exhibit 

 a medium-sized and moderately thick-walled, vase-like or cup-like 

 body, firmly attached to the substratum by a short stalk-like 

 base, No prostalia of any kind were found, possibly as the result 

 of abrasion. Through the even ectosome were seen elongated, 

 angular or spindle-shaped and pit-like^subdermal spaces, whence 

 arose rather Z2 arrow incurrent canals. On the gastral side the 



