314 Zoological Society : — 



Description of some New Species of Entozoa. 

 By W. Baird, M.D., F.L.S., etc. 



1. Ascaris unduloso-striata, Baird. 



Head naked, -with well-marked, roundish labial lobes. Body of a 

 white colour, with a well-defined line running longitudinally through 

 its whole length ; smooth, but finely wavedly striated longitudinally, 

 instead of transversely. The greatest diameter is at the anterior extre- 

 mity, the body tapering gradually towards the tail, and terminating 

 in a finely subulate point. In the female this point is long, and 

 gradually becomes very fine ; in the male the body, posteriorly to 

 the opening from which issue the male organs or spicula, suddenly 

 contracts and tapers quickly to a very sharp subulate point. The 

 body shows no transverse striae, the only visible ones being longitu- 

 dinal and finely waved. 



Length of female 5£ lines, male A\ lines. 



Hab. Intestines of the King- Vulture (Sarcorhamphus papa). 

 (Mus. Brit.) 



2. Sclerostoma mucronatum, Baird. 



Body semicylindrical, of a brownish colour ; thickest in the mid- 

 dle, attenuating towards each extremity, but more so at the anterior 

 extremity. Integument strongly striated, or almost plicated. Head 



continuous with body. Male ? Female with the vulva situated 



about one-third from the posterior extremity, and marked with a 

 strong tubercle. The tail is armed at its extremity with a strong, 

 sharp spine, which is slightly incurved. 



Length of female 4 lines ; greatest breadth about -| line. 



Males of this species have not been observed. 



Hab. Intestines of the Palluma (Phrymaturus palluma) from 

 Chili. {Mus. Brit.) 



3. Pentastoma teretiusculum, Baird. 



Head rounded and truncated. Body cylindrical, of a red colour, 

 considerably more attenuated posteriorly. Tail shortly bilobed. 

 Greatest width of body about 4 or 5 lines below the head ; it then 

 gradually attenuates till it reaches the posterior extremity. Integu- 

 ment annulosely ringed ; rings about one-third of a line in width. 



Length 2 inches 5 lines ; breadth 3 lines. 



The only specimen taken is a female. 



Hab. Taken from the mouth of an Australian Snake (Hoploce- 

 phalus superbus) which died lately in the Zoological Society's Gar- 

 dens, Regent's Park. (Mus. Brit.) 



For the three above-described species I am indebted to Mr. Edward 

 Gerrard, of the British Museum. 



4. Tetrarhynchus minxjto-striatus, Baird. 



Head of a white colour, solid and smooth. Neck much narrower 

 than head, nearly of the same dimensions throughout its whole 

 length, and minutely and finely striated. Bothria ear-shaped, rather 

 broader at upper than lower part ; open above, adnate below, with 



