Gattij Marine Laboratory^ St. Andrews. 47 



ventral row of bristles forms a convex flap — higliest in tlie 

 middle — and without any evident ditl'ercntiation till the 15th 

 foot, when a papilla projects from its median convexity 

 (one or two of the preceding feet showing a slight thickening 

 at tlie same part). The row of ventral bristles is shorter. 

 Though the bristles are longer, the row is still shorter at the 

 IGth toot, and a papilla occnrs on each side behind it. The 

 17th foot has three papilln3, Avhilst the 18th has the enlarged 

 lateral fillet with an isolated papilla below it, and this for 

 three or more segments. 



A form like Sculop^os *, dredged at Station G, 1100 

 fathoms, in the 'Valorous' Expedition of 1875, differs from 

 S. armiyer and (S. AJiilleri so distinctly that its features may 

 be mentioned. The snout forms a short cone in front of 

 the large peristomial segment which has the triradiate mouth 

 infeiiorly. The snout in Scoloplos armiyer is considerably 

 longer and the peristomial segment smaller. The body is 

 rounded auteriorly, and indeed — so far as the fragmentary 

 specimen goes — throughout, and is thus in contrast with 

 the flattened anterior region of S. armiyer and -S. Miilleri. 

 The dorsal surface of each segment is marked by a narrow 

 ridge rourid the borders with a dej)ressed area in the middle. 

 Yeutrally each segment of the first fifteen has a slight eleva- 

 tion in the middle. The great length and curvature of the 

 dorsal bristles anteriorly is noteworthy. The foot in the 

 anterior region is characterized by the tapering condition of 

 all the bristles, both dorsal and ventral, and in the absence 

 of the marked diflerentiation between them. Almost from 

 the 1st foot a minute dorsal and ventral papilla are present, 

 and they increase in the subsequent feet. These proces;es 

 in the anterior region form a prominent pair of cirri, which 

 are nearer each other than in the ordmary form. It is 

 difficult to say Avhere the change in the anterior feet occurs, 

 but apparently the first nine are thus differentiated, though 

 it is at the 12th foot that another flattened and broader 

 process appears above the subulate ventral process or ciirus. 

 The yellowish dorsal bristles have smooth shafts with long, 

 curved, and minutely serrated tips^ which vary in appear- 

 ance according to position, giving a camerated aspect in 

 whole or in part, from the peculiar arrangement of the 

 spinous rows. The dorsal cirrus is in the typical foot a long 

 flat cone. The ventral cirrus is a short conical papilla. 

 The ventral bristles are shorter, with tapering and finely 

 serrated tips which project only a short distance beyond the 



* Should this prove to be new, the specific name Jeff'r('i/:'ii would be 

 appropriate. 



