REPORT OF COMMISSIONERS OF INLAND FISHERIES. 73 



Diosaccus tenuicornis (Clans). 



Wickford and Charlestown Pond. 

 Dactylopusia vulgaris (G. 0. f^ars). 



Wickford and Charlestown Pond. 

 Thalestris serrulata Brady. 



The record for this species rests on one specimen from Rocky 

 Point. 

 Harpacticus imiremis Kroyer. 



Upper Narragansett Bay. 

 Harpacticus chelifer (MuUer). 



Wickford and Charlestown Pond. Many of the specimens 

 show points of resemblance to H. gracilis. 

 Idya furcata (Baird). 



Narragansett Bay. Common. 

 *Ilyopsyllus natans n. sp. Plate I. 



Body heavy, short, and pear-shaped, except that its ventral edge 

 is almost straight while its back is correspondingly elevated. Color, 

 opaque reddish-brown with scattered brilliant red spots. Rostrum, 

 strong, large, and jointed at base; its apex with two down-curved, 

 ciliated, movable spines. Eye, large, red, T-shaped, with three 

 lenses in front, one on each side, and one in the middle in base of 

 rostrum. The 1st of the ten segments is very large, strongly convex 

 above, and has nearly straight ventral and posterior .edges. The 

 following segments taper rapidly to the small abdomen. Thoracic 

 segments of nearly equal width ; ventro-lateral angles of first three free 

 thoracic segments form triangular, acute processes, that of the 2nd 

 and 3rd has also an accessory tooth. Preanal abdominal segments 

 of equal width; anal segment very short with a blunt, median, dorsal 

 projection. Posterior edge of the abdominal segments spinose on 

 the belly and sides. Furca short, spinose, with a small, jointed dorsal' 

 seta, a minute inner bristle, and tw^o terminal setae; inner terminal 

 seta as long as liody, its proximal half broad and naked, its distal 



