410 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Clytemnestra scutellata, Dana. 

 Occurrence, Nos. 4, 6, 7, 8, 9, 11, 12, 13, 15, IT, 18, 19. 



Ectinosoma atlanticum, Euterpe acutifrons, Setella gracilis, 

 Miracia efferata, and Clytemnestra scutellata, have already 

 been recorded by Mr. Thompson from the greater part of 

 the region traversed by the Eobinson collection. 



Stenhelia irrasa, n. sp. Plate III., figs. 6-10. 

 Occurrence, Nos. 4, 5. 



Description of the Female — Length "76 mm. Body 

 elongate, slender ; rostrum small and slightly curved. The 

 abdomen is ornamented with a few rows of minute spines 

 on the dorsal and lateral surfaces near the posterior end of 

 the joints. The anteimules are short and five-jointed ; 

 the fourth joint is smaller than any of the others, and 

 the fifth joint in some positions has an indication of a 

 dividing line near the middle. The formula shows the 

 proportional lengths of the joints. 



Proportional lengths of the joints - 6 2 3 1 3 

 Number of the Joints - - - 1 2 3 4 5 



Antennae, mandibles, maxillae, and foot jaws somewhat 

 similar to those of Stenhelia ima, Brad} r . First four pairs 

 of swimming feet also resembling those of S. ima. The 

 fifth pair of feet are small and foliaceous. The inner 

 branches are sub-triangular, and furnished with three 

 plumose setae on the inner distal margin and two on the 

 apex. The outer branches are pyriform in shape, and 

 furnished with two plumose setae on the outer, and two on 

 the inner distal margins, and one on the apex (fig. 9). 

 Caudal furca very short. 



Remarks. — This species, though somewhat like Stenhelia 

 ima, is readily distinguished from it, and any of the other 

 members of the genus, by the structure and proportional 

 lengths of the joints of the anteimules, and by the form of 

 the fifth pair of feet. 



