156 



THE PUK SEALS OP THE PRIBILOF ISLANDS. 



Von Linstow (1892, p. 89) records Ascaris osculata from stomach of Stenorhyncjms 

 leptonyx, iu Siid-Georgien, Antarctic (Hamburg Museum, No. 15326). The cuticula is 

 regularly striated at distances of 7 to 8 yu; the cervical papillae are situated 0,85"™ 

 from the anterior end; the lips are large and without any dentigerous ridge; the dorsal 

 lip measures externally 0.091""" long by 0.12""" broad, and on its inner anterior surface 

 it is prolonged laterally on each side in an angular projection. Immediately back of 

 the lips the cuticle possesses deep folds. In both sexes the tail is conically pointed. 

 The oesophagus is 1/8.4 as long as the body. Oesophageal and intestinal caeca are 

 present. The males attained 40""° in length by 1.5""" in diameter; spicules equal and 



■:| 



rig. 86. 



very long (3.7""); tail 1/91 as long as body; caudal bursa present; about 45 pairs of 

 caudal papillae are present, of which about 15 pairs are figured as postanal, one pair 

 of large double papillae being present about halfway between the cloca and tip of the 

 tail. The females attain 54'"'" in length by 1.58'"'" in diameter; the vagina is situated 

 about one-third the length from the head; eggs measure 83 by 67 ^,. 



Jagerskiold's (1893) article is not at our disposal at present. In his second paper 

 (1894, pp. 457-463) Jagerskiold discusses specimens collected by Klinckowstrom from 

 the nasal cavity of Phoca vitulina at Oresund. He finds the vulva situated oue-third 

 the length of the body from the head, and describes the oesophageal and intestinal 

 caeca as present (fig. 83); his other statements are chiefly regarding the microscopic 



