• LEUCOPSACUS SCOLTODOCUS. 47 



base is ßi mm. broad. This expands below into a firm, thick, 

 basal disc, 11 mm. in diameter. The osculum at the upper end 

 is romidish, measuring 5 mm. in diameter and with a thin and 

 simple oscular margin. The sjDecimen was found attached on an 

 undescribed Hexacl'mella , which shall be described in a later 

 Contribution under the name of //. Joriea. Locality : Outside 

 Okinose by Iwado-line. 



A bottle, numbered 23.5 in the 8ei. Coll. jMus., contains no 

 less than nine specimens of the present species from the same 

 locality, all found attached likewise to a piece of Hexactinella 

 lorica. Two of them are shown in natural size right and left of 

 fig. 27, PI. III. All the specimens are small, being fusiform or 

 ovoid in shape and round in cross- section. The smallest is not 

 larger than a grain of rice, while the largest is 13 mm. long and 

 6 mm. broad in the middle. The upper end is occupied by a 

 round and simple osculum ; the opposite end terminates in a firm 

 basidictyonal mass or plate, which may be very thin or of a 

 considerable thickness. Fig. 28, PI. III., represents the appear- 

 ance of one of the specimens as seen in a stained longitudinal 

 section. 



On still another Hexactinella lorica (Sp. No. 448) from the 

 same spot and a depth of 572 m., I have found several L. 

 scoliodocus of varying sizes (2-13 mm. in height), in company 

 with Lanuginella pupa, Staurocalyptus pleorhaphides, etc. 



Finally I have to mention a specimen from the northern 

 side of Onigase (Sp. Xo. 434). It has the shape of a somewhat 

 laterally compressed spindle, 20 mm. long and 11m. broad in 

 the midde, in which region the wall is about 2 mm. thick. The 

 truncated oscular end as well as the base measures about 4 mm. 

 in breadth. 



