ISOPODS OF NORTH AMERICA. 



355 



FIG. 382. CHIRIDOTEA TUFTSII 

 (AFTER HARGEK). 



Localities. Bay of Fundy; Long Island Sound; Massachusetts 

 Bay; Casco Bay, Maine; Princes Cove, Eastport; Halifax, Nova 

 Scotia; near Halting Rock, channel outside Bakers Island. 

 Depth. Surface to 25 fathoms, in fine sand. 

 Body ovate, less than twice as long as wide, 3 mm. : 6 mm. 

 Head twice as wide as long, 1 mm. : 2 mm. , 

 with the front deeply excavate between 

 the antero-lateral angles, and produced in 

 a small median point. 



The sides of the head, where the lateral 

 margin is free, are cleft, the posterior lobe 

 formed by the cleft margin being produced 

 laterally beyond the anterior lobe. The 

 posterior portion of the head is deeply set 

 in the first thoracic segment. The eyes 

 are small, round, composite, and situated 

 just within the cleft on the lateral margin. 

 The first pair of antennas have the basal 

 article large and somewhat dilated; the 

 second article is one and a half times longer 

 than the first; the third is one and a half 

 times longer than the second; the fourth is as long as the third. The 

 first antennas extend to the middle of the fifth article of the peduncle 

 of the second pair of antennas. The second antennas have the basal 

 article short, and concealed in a dorsal view; the second article is 

 twice as long as the first; the third is a little shorter than the second; 

 the fourth is about as long as the second; the fifth 

 is as long as the third and fourth taken together. 

 The flagellum is composed of 11 or 12 articles in one 

 specimen, of 14 in another specimen, and extends 

 to the posterior margin of the sixth thoracic seg- 

 ment. The palp of the maxillipeds is composed of 

 three articles. 



The first segment of the thorax has the antero- 

 lateral parts produced forward to surround the pos- 

 terior half of the head. The epimera are distinctly 

 separated in all the segments, with the exception 

 of the first, and are wide plates, with the outer post- 

 lateral angles of the last four acutety produced. 

 The abdomen is composed of four distinct segments, the fourth or 

 terminal segment being 2 mm. in length and one-half mm. wide at 

 the base, and having lateral sutures, indicative of another partly coa- 

 lesced segment. It is acutely produced at its posterior extremity. 



The first three pairs of legs are prehensile, the last four pairs 

 ambulatory. 



FIG. 383. CHIRIDOTEA 

 TUFTSII. MAXILLIPED. 



