ISOPODS OF NORTH AMERICA. 



73 



tude 22° 47' east, between Norway and Beeren Island; latitude 73° 

 27' north, longitude 23° 11' east, between Norway and Beeren Island; 

 latitude 77° 25' north, lonoiludc 27° 30' east, north of Hope Island; 

 latitude 76° 46' north, longitude 15° 22' east, off Horn Sound, West 

 Spitzbergen ; King Charles Island, Bremer Sound; latitude 78° 50' 

 north, longitude 27° 39' east. King Charles Island: latitude 78° 50' 

 north, longitude 29° 39' east. King Charles Island; latitude 81° 14' 

 north, longitude 22° 50' east, northeast of Seven Islands; latitude 79° 

 58' north, longitude 9° 30' east; 19'-20' north of Danish Island; lati- 

 tude 73 3' north, longitude 

 18^ 30' east, between Beeren 

 Island and Norway (Ohlin); 

 latitude 71° 31' north, longi- 

 tude 49° 12' east (Stebbing). 



Depth.— lO-'l^O fathoms; 

 20-460 m., in mud, clay, 

 gravel, stones, rocks, barna-- 

 cles, sand, and shells. 



Body extremel}" narrow 

 and elongate, about ten and 

 a half times longer than 

 broad, 2^ mm. : 26 nun. 



Head a little wider than 

 long, li mm.: 2 mm., be- 

 coming slightly narrower 

 toward the anterior end, 

 which is li mm. wide, and 

 has the frontal margin exca- 

 vate on either side of a small 

 median point. The eyes are 

 absent. The first pair of an- 

 tennae have the three pedun- 

 cular articles about equal in 



length but decreasing in size, the basal one being the largest. The 

 liagellum is composed of ten articles, and extends to the end of the 

 peduncle of the second pair of antennie. The second pair of antennie 

 have the basal article short; the second is nearly twice as long; the 

 third is half as long as the second; the fourth is twice as long as the 

 third and about as long as the second, but more slender; the tifth is a 

 little longer than the fourth, about one and a third times longer. The 

 flagellum is composed of eleven articles. The second pair of antennae 

 are about 3 mm. long. The maxillipeds have a palp of three articles. 

 The palp of the mandibles is composed of three articles. 



Fig. 57.— Calathura branchiata. a, First les. 

 X lis. b. Second antenna, x 20j. c, First max- 

 illa. X 39. d,a Maxilliped. X 39. e, Mandible. 

 X 39. /, First antenna, x 20^. 



« Basal article of palp not shown in drawing. 



