70 Zoological Society : — 



yond the margin. Anterior portion of body much narrower than 

 posterior. Tail rounded, thick, obtuse. Females spirally twisted in 

 many convolutions ; of a dark olive colour. jNIales straight to within 

 a short distance of tail, which is inflected ; of a whitish colour. Skin 

 of body minutely and finely striated across, "^'ing extending along 

 the whole length and becoming thicker and stronger at inferior ex- 

 tremity. Length of male 2 inches, breadth 1 line. Length of female 

 \^ inch, breadth f of a line. 



This species resembles the A. oscidata from the Phoca vitiiUna, 

 but differs in having the wing stronger and thicker at inferior extre- 

 mity, in having the head and mouth smaller, and in the skin of the 

 body being finely striated across. 



Hab. Stomach of a Seal from Antarctic Seas ; collected during the 

 late Antarctic expedition. Brit. Mus. 



2. ASCARIS L.EVISSIMA. 



Ascaris leevissima, Baird, Cat. Entoz. Brit. Mus. 25. 



Head small, in form of a narrow circular rim ; valves of mouth 

 large and distinct, of a triangular shape, divided at the tip into two 

 lobes, each of which again is broadly emargiuate. Between each of 

 the valves, at their base, is a small smooth tubercle or prominence. 

 Body round, very smooth, of a rather dark olive colour, marked with 

 numerous very fine smooth longitudinal lines, and occasional very 

 distinct red circular lines at irregular distances ; tapering at both ex- 

 tremities, narrower at posterior extremity. On each side of the body 

 is a smooth narrow band of a lighter colour, which runs the whole 

 length, and has the appearance at first sight of a wing, but is not 

 raised. Length 10 inches ; greatest breadth 4 lines. 



Hab. 1 India ; from the Collection of General Hardwicke. 



Brit. Mus. 



3. Ascaris bifaria. 



Ascaris bifaria, Baird, Cat. Entoz. Brit. Mus. 26. t. I. f. 2. 



Head rather small ; valves rounded, wrinkled transversely and 

 slightly bifid at the upper margin. Body round, much narrower at 

 anterior than posterior extremity. Anterior third of body surrounded 

 with numerous verv close-set, circular, raised striae. Remainder of 

 body smooth, with the striae not raised and about one-fourth of a line 

 apart from each other, till within about half an inch of inferior ex- 

 tremity, which is large and obtuse, when it again becomes surrounded 

 with numerous raised circular lines or striae which give it a wrinkled 

 appearance. The tail terminates in a papilla, and the anus is lunar- 

 shaped and situate at the base of the papilla about half a line from 

 the extremity. The whole surface, in addition to the raised lines or 

 striae, is covered with exceedingly fine and immenselv numerous 

 striae. A line runs down each side of the body throughout its whole 

 length. Length 9 inches, breadth 5 lines. 



Hab. ? From Korea. Collected by Capt. Sir E. Belcher, C.B. 



Brit. Mus. 



