DURING JULY AND AUGUST, 1907. 229 



rhinophores and papillae, dull yellowish white, freckled with brown. 

 Tail very obtuse. 



The specimen was found upon a colony of Alcijonium digitatum. 



-ffiOLIDIELLA ALDERI (Cocks). 



Voyage XCVI. Station 15. Lat. 54° 30' N. Long. 3° 59' E. 25 fathoms. 

 1 specimen. 



Found on Alcyonmm digitatum. Length about 16 mm. 



When first obtained the specimen was taken to be a variety of 

 A. glauca, but upon examining it in the Laboratory I found that it 

 belonged to the present species. 



Oral tentacles longer than the rhinophores, and white ; rhinophores 

 stout, wrinkled, bright orange-red, and very like those of A. glauca. 

 Papillae set in 8 or 9 rows, of a reddish chestnut colour, paler at the 

 bases and tips, and more or less freckled with white. 



The "ruff" was not well marked, but the papillae forming it were 

 paler than the rest. All the papillae were erected upon irritation. 

 Tail tapering to a fairly -fine point. 



The radula agreed generally with Alder & Hancock's plate and 

 description. There were 14 plates of a clear yellowish white, tapering 

 gradually ; the central tooth rather stronger than in their figure, and 

 the laterals 24 in number. 



JEOLIDIELLA GLAUCA (A. & H.). 



Voyage XCV. Station 24. S. edge of the Coal Pit. 13 fatlioms. 1 specimen. 

 Voyage XCVI. Station 18. Lat. 54' 16' N. Long. 1° 46' E. 23 fathoms. 

 2 specimens. 



The specimen from XCV — 24 was upon Alcyonium digitatum. 



Those from XCVI — 18 were found clinging to the meshes of the 

 beam trawl, but A. digitatttm occurred commonly in the haul. 



All the individuals agreed with Alder and Hancock's specimen in 

 form, but showed considerable variation in their colouration, especially 

 in the colouration of the papillae. 



{a) In the specimen from XCV — 24 the length was 14 mm. The 

 rhinophores were somewhat wrinkled, short, stout, and tipped with 

 white. Oral tentacles semi-transparent and freckled all over with 

 white. Body and papillae as in Alder and Hancock's plate. Eyes 

 plainly visible. 



(h) Those from XCVI — 18 measured 35 and 25 mm. in length, 

 respectively. 



