2O COE 



dish Nematodes. Very abundant at New Metlakahtla, Glacier Bay, 

 Sitka, Orca and at other places. The species is also common on the 

 coast of New England, and is likewise found along the shores of 

 northern Europe and in the Mediterranean. 



Carinoma Oudemans. 



Circulatory and Nephridial Apparatus of the Nemertea, Quart. Journ. Micr. 

 Sci., xxv, Suppl., pp. 1-80, 1885. 



Body usually slender, often thickened and rounded anteriorly, flat- 

 tened in intestinal region ; head usually wider than parts immediately 

 following ; mouth situated immediately behind the brain ; proboscis 

 pore subterminal. Lateral slits, cephalic groves, and cerebral sense 

 organs wanting. Intestine with paired, lateral diverticula. 



Body musculature composed of two muscular layers throughout 

 length of body, and of localized supplementary layers. These consist 

 of a thick internal longitudinal layer and a thin external circular layer, 

 but in the esophagal region a second circular layer lies internal to the 

 longitudinal muscles, and just in front of the nephridial region be- 

 comes enormously thickened. In the anterior portions of the esoph- 

 agal region a double set of distinct diagonal muscles lies just internal 

 to the outer circular muscular layer. 



The lateral nerves are situated within the longitudinal muscular 

 layer. 



In the anterior portions of the esophagal region are three pairs of 

 longitudinal blood vessels, of which one pair represents the main lat- 

 eral vessels and lies beside the esophagus, a second pair lies beside the 

 proboscis sheath, and the third pair is situated internal to the ventral 

 wall of the proboscis sheath and projects freely into the rhynchocoel. 



5. CARINOMA GRIFFINI sp. nov. 



Two 1 species of this interesting genus are already known from 

 other parts of the world C. armandi Oudemans, which is found 



1 Miss C. B. Thompson has very recently added a third species, C. tremaphoros 

 (Zool. Anz., Vol. xxin, No. 631, pp. 627-630, Dec., 1900, from a single speci- 

 men collected at Woods Hole, Mass. I have found this species rather abundantly 

 in a large pond at Falmouth, Mass., connected with Vineyard Sound by a very 

 narrow outlet, and consequently but little affected by the tides. The species 

 must be unusually hardy, for the worms lived just on the edge of the pond in 

 sand much blackened by decaying organic matter. They have moreover to en- 

 dure great changes in the salinity of the water due to irregularity in rainfall and 

 evaporation. Further notes in regard to the anatomy of this species will be 

 published later, together with colored figures of the living worms. 



