174 THE FUR SEALS OF THE PRIBILOP ISLANDS. 



Stiles, Ch. Wardell and Hassall, Albert — Continued. 



1899. Internal parasites of ttie Fur Seal. Tlie present paper, pp. 99-177, 98 figs, in text. 

 Stossich, M. 



1896. II genere Asearis Linn^ <;Bo1I. Soc. adriatica Sci. nat. Trieste, XVII, pp. 9-120. 

 Zeder, J. G. H. 



1803. Anleitung zur Natnrgeschichte der Eingeweidewiirmer. Bamberg. 432 pp., 8°, 4 pis. 



~ DESCRIPTION OF FIGURES. 



Fig. 1. Dorsal lip of Asearis decipiens, showing the basal portion, the anterior bilobed projection and 

 the dentigeroiis ridge, x 100. After Krabbe, 1878, pi. i, fig. 3. 



Fig. 2. Tail of male specimen of Asearis decipiens, ventral view, showing the cloaca, the six pairs of 

 postanal papillae, and some of the praeanal papillae, x 100. After Krabbe, 1878, p. 46, 

 fig. 1. 



Fig. 3. Dissection of a male specimen of Asearis bulhosa {^A. decipiens) from Erignathus iarbatws: "b., 

 bulb of the oesophagus; d., intestine; de., ductus ejaoulatorius; eo., excretory organ; h., 

 testicles; mb., bursal muscle; «/., lateral line; si., vas deferens; s«., vepicula seminalis 

 ("Samensohlanch"). x2. After Cobb, 1888, pi. v, fig. 29. 



Fig. 4. Ventral view of tail of Asearis bulbosa (=A. decipiens) from Erignathus barbaius, showing the 

 cloaca and the caudal papillae, x 80. It will be noticed that postanal papillae 5 + 6 are 

 double; otherwise this figure agrees essentially with Krabbe's figure given above (fig. 2). 

 After Col)b, 1888, pi. v, fig. 30. 



Figs. 5 and 6. Two variations of the anterior portion of the intestinal tract of Asearis decipiens from 

 Saliehoerus grypus. Cf. figs. 16 and 17. Pig. 5 shows the two portions of the oesophagus, 

 the oesophageal caecum, the proximal portion of the intestine and the intestinal caecum. 

 Fig. 6 shows the two portions of the oesophagus without formation of an oesophageal 

 caecum, and the proximal portion of the intestine with intestinal caecum. Zeiss 2/A2. 

 After Jagerskiold, 1894, pi. xxvm, figs. 40 and 41. 



Figs, 7 and 8. Two female specimens of Asearis decipiens from the Alaskan fur seal and the hair seal. 

 The transverse ridge on the ven,tral surface designates the position of the vulva. Natural 

 size. Original. 



Fig. 9. Male specimen of Asearis decipiens from the Alaskan fur seal, showing the curved, flatted tail. 

 Natural size. Original. 



Fig. 10. Transverse section of the head of Asearis decipiens from ^he Alaskan fur seal, showing three 

 lips with their sense-papillae; the triangular lumen of the oesophagus, with apex extend- 

 ing between the ventral lips. The section is slightly diagonal. Zeiss 4/8, stage. 

 Original. 



Fig. 11. Apex view of the cuticle of the lips of Asearis decipiens from the Alaskan fur seal. The excre- 

 tory pore is seen between the ventral lips. Zeiss 4/8, stage. Original. 



Fig. 12. DorsEQ vie w of the anterior portion of Asearis decipiens from the Alaskan fur seal, showing the 

 dorsal and ventral lips and the cervical papillae. Zeiss 4/16, stage. Original. 



Fig. 13. Ventral view of the anterior portion of Asearis decipiens from the Alaskan fur seal, showing 

 the ventral lips and cervical papillae. Zeiss 4/16, stage. Original. 



Fig. 14. Apex view of the lips of Asearis decipiens from the Alaskan fur seal, showing the anterior 

 double-lobed projections; the excretory pore is seen between the ventral lips. Free- 

 hand drawing under a magnifying glass. Original . 



Fig. 15. Transverse section through anterior extremity of the lips of Asearis decipiens from the Alaskan 

 fur seal, showing the double-lobed projections with dentigerous ridge. iJeiss 4/4, stage, 

 afterwards reduced one-half. Original. 



Figs. 16, 17. Two views of the proximal portion of the intestinal tract of Asearis decipiens from the 

 Alaskan fur seal. Cf. figs 5 and 6. Zeiss 4/a*10, stage, afterwards reduced one-half. 



Fig. 18. Lateral view of tail of male of Asearis decipiens from the Alaskan fur seal, showing oarinated 

 dorsal ridge, lateral alae, concave ventral surface, sense papillae, and spicules. Zeiss 

 4/16, stage. Original. 



Fig. 19. Ventral view of tail of male of Asearis dedpims from the Alaskan fur seal, showing some- 

 what the swollen lateral alae, the cloaca, and sense papillae. Original. 



