Vol. XVIII. pp. 127-132 



April 18, 1905 



PROCEEDINGS 



OK THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW SPECIES OF PARASITIC COPEPODS FROM THE 

 MASSACHUSETTS COAST. 



BY CHARLES BRANCH WILSON. 



By Permission of the Seeretary of the Smithsonian Institution. 



It is desirablf that the following new species of parasitic 

 copepods he included in the list of C-rustacea about to be pub- 

 lished l)y the Boston Society of Natural History, since they are 

 very common along the Massachusetts coast. 



For this reason a brief preliminary description is herewith 

 presented, to be followed in tlie near future l)y a more detailed 

 account, accompanied by suitable drawings. 



Qloiopotes ornatus sp. nov. 



Ti/pe from Woods Holl, Massachusetts. No. 6209 U. S. National IMuseuni. 



Female. — Carapace elliptical ; frontal plates well defined ; no lunulas. Pos- 

 terior sinuses large and well rounded ; median lobe less than half the entire 

 width, not projecting behind the lateral lobes, its posterior margin concave. 

 Thoracic area very large and oblong, divided by secondary grooves into 

 quarters, each variously ornamented by elevations and depressions of the 

 surface. There are also small spines along either side of the median lobe, 

 while the outer margin of the lateral lobe is ornamented with a row of 

 long wavy hairs, which extend forward about tothecenterof the carapace. 

 Free segment short and wide, covered dorsally l)y two broad plates which 

 extend out oyer the basal joints of the fourth legs. Genital segment liorse- 

 shoe shaped, about half as wide as the carapace, and prolonged backward 

 in a curved lobe on either side of the abdomen. Tliis segment carries 

 20-Puoc. Biol. Soc. Wash., Vol. XVIII, 1905. (127) 



