108 THE PUR SEALS OF THE PRIBILOF ISLANDS. 



7. Cutioular bands, 32 u broad; dorsal lip divided into a large base, and a very small anterior 



bilobed projection; 'second portion of oesophagus generally sigmoid. 

 Male: 31 to TO""" long; with 9 to 10 (11) pairs of postanal papillae, of which 1, 2, 3 are conical 



and near the tip, 4 to 10 (11) shorter and nearer the cloaca; praeanal papillae numerous, 



arranged in three rows each side; left (3""") spicule about three times as long as right 



(0.96""") spicule. 

 Female: 37 to gO"™ long; vulva near middle of the body. 



Hosts: DelpMnus and Prodelphinus; Atlantic and Pacific oceans A. typica (p. 127), 



Cuticular bands 24 /( broad; lips not well studied, but apparently of nearly equal size. 



Male: unknown. 



Female: 62 to 75'""" long; of a dark brownish or white color. 



Host : Odoienua rosmarus A. iicolor Baird sp. inq. (p. 138). 



8. Lips of nearly equal size ; intestinal caecum present. 



Male: 85 to US™"" long; one pair of postanal papillae, four pairs of praeanal papillae ; spicules 



short. 

 Female: 85 to 144™"' long; vulva one-third to two-thirds the length from anterior extremity. 



Host: Dugong dugon A. halicoris (p. 147). 



Host: Antarctic seal (genus? species?). Wings said to extend the whole length, -becoming 



thicker at distal extremity. Worms 37 to 50"'"', of a dark olive color. 



A. aimilis, sp. inq. (p. 146). 



9. Cuticle immediately back of lips, in deep folds; posterior portion of oesophagus, including 



oesophageal caecum, between one-third and one-half as long as anterior portion ; cuticular 

 bands 8 jn broad, without finer striation. 



Male: 34 to 70'""" long; 8 to 10 pairs of postanal papillae, of which 1 to 4 are near the tip, 

 and one pair of double papillae between these and cloaca; 30 or more pairs of praeanal 

 papillae, arranged on each side irregularly or in a double row; spicules equal, 3 to 8"'"' 

 long. 



Female: 40 to 80"'" long; vulva on a prominent tran verse ridge about one-third the length of 

 . the body from the head. 



Host: Phooa, Malichoerus, Stenorhynchus, Eunielopias; cosmopolitan A. osculata (p. 151). 



Posterior portion of oesophagus, with oesophageal caecum, scarcely one-sixth as long as anterior 

 portion. 



Male: 40""" long; 12 pairs of postanal papillae, of which 1 to 3 are near the tip, 4 to 12 irregu- 

 larly arranged; praeanal papillae in a single row. 



Female : 50™™ long ; vulva about one-fourth the length of the body from the head. 



Host : Platanista gangetica; Ganges A. lobulata (p. 159), 



10. No details of structure known. 



Hosts: P!ato«isto and the extinct Hydrodamalis ^ H 



First portion of oesophagus 5'"™ long; second portion 1.5™'" long, sigmoid; cuticular bands 



29 to 30 /It broad; head 0.4™™ broad; lips small. 

 Male : 79™™ long, tail curled, caudal alae present with 8 to 10 papillae ; spicules unequal (27 : 15). 

 Female: 70 to 100™'" long, vulva 25 to 40™'" from anterior extremity. 

 Host : Dolphin (gen. ? sp. ?), Indian Ocean j. Dussumierii (p. 161), 



UNIDENTIFIABLE SPECIES. 



11. Host: Dolphin of the. Ganges (Pfatenisto (/OMjeMca) near Calcutta. Length over 



an inch long j. delpUni (p. 162). 



Host: Steller's extinct sea cow (Hydrodamalis gigaa) Bering Sea. Length 



"half afoot" a. i-ytiliae (p. 163). 



I. Intermediate lips absent. 



A. Dentigerous ridge present on lip. 

 a. Dentigerous ridge simple. 



a. Cuticle, with broad cuticular bands, and narrow transverse striae ; spicules of 

 nearly equal length. 



