440 



MR. C. F. JENKIN ON 



[May 12, 



is solid The Eat shape of the specimen is remarkable; the 

 ordinary shape of the heads of Clathrina hlanca is more or less 



^^Th^skeleton consists of regular and sagittal triradiates_ (text- 

 fio". 87). The spicules agree fairly well with the descriptions 

 gfven by Haeckel (1) and von Lendenfeld (7). 



Text-fig. 87. 



Clathrina hlanca, spicules. X 220. 



The body-spicules are mostly regular, but some have the basal 

 rays slightly the longest. Paired rays 65-70 ^i x 4-6 /x. Basal 

 ray 70-110 ju X 4-6-5 ju. 



The stalk-spicules are almost all sagittal, the smaller ones on 

 the outside and the larger ones inside, all arranged with the 

 basal ray downwards. Paired rays 60-80 ^ x 5-9 /i. Basal ray 

 100-160^x70-110^. 



Leucosolenia irregularis, sp. n. (Text-figs. 88-90.) 



One small specimen of this new species was found among the 

 Clathrina primordialis dredged in 6-8 fathoms at Wasin. It 

 consists of two erect tubes with a short rooting tvibe (text-fig. 88). 



The skeleton (text-fig. 89) is rather remarkable. It contains no 

 triradiates but is made up of two types of equiangular quadri- 

 radiates, lying without orientation, together with a few large 

 oxea which project in all directions. 



