2 ART. 5. — SANJI hözawa: 



also rendered me many a courteous help during the course of my 

 investif^ation. 



Family HETEROPIIDiE Dendy. 

 Genus Grantessa von Lendenfeld (emend.). 



1. Grantessa sJiimejif n. sp. 



(PL I., figs. 1, 2 ; PI. n., figs. 10, 11 ; textfig. 1). 



This new species is represented in the collection by five speci- 

 mens. They differ more or less from one another in certain minor 

 points of external feature, but are practically identical in the finer 

 structure. 



The first specimen (Sei. Coll. Spec. No. 1 ; PI. I., figs. 1, 2), 

 which is taken for the type, was obtained by K. Aoki in the 

 immediate neighbourhood of the Misaki Marine Biological Station. 

 The sponge forms an irregular hemispherical colony with a height 

 of 45 mm. and maximum diameter of about 85 mm. In the 

 superficial parts, the colony is seen to consist of numerous sub- 

 cylindrical, erect and on the whole radially directed tubes, each 

 of which somewhat tapers distally and terminates with an 

 osculum. The tubes may be 6-10 mm. long, and IJ mm. broad 

 in the lower parts, where the wall presents a thickness of 0.35- 

 0.6 mm. The wall gradually diminishes in thickness towards the 

 oscular margin. The osculum is approximately circular with a 

 diameter of J-1 J mm. An oscular fringe of oxea is present, but 

 is scarcely visible to the naked eye. The dermal surface is rough, 

 owing to the presence of oxea in scattered tufts projecting almost 

 vertically fi'om it. The gastral surface is also rough on account 



