206 dr. t. s. coBBOLD on entozoa. [Mar. 7, 



dinal lines are not represented here ; but they are separately shown in 

 figure 6, where the quarter-inch glass also brought into view numerous 

 transverse striae between the ridges. Alterations of the focus, however, 

 served to show that the transverse lines were continuous and not in- 

 terrupted by the longitudinal lines. I am under the impression that 

 these lines are due to the presence of water-vascular canals, but could 

 not demonstrate the existence of a lumen with certainty. Another 

 illustration shows part of the bursa highly magnified (fig. 7). The 

 tubular character of the rays, with their finely granular contents, was 

 well seen, the bursal membrane being itself marked by a series of 

 perfectly distinct striee radiating from the base to the outspread 

 margin, the latter being distinctly bordered by a thin extension of the 

 cuticular layer. In another drawing I have represented an eularged 

 view of the head of the male (fig. 8) ; and I have also given (fig. 9) a 

 less magnified view of the tail of the female. 



14. Spiroptera muriei, nov. sp. (Plate XXI.) 



The eleven nematodes above mentioned as being of intermediate 

 size I have also determined to be new to science. As already stated, 

 they were removed by Dr. Murie from the stomach and and oesopha- 

 gus of the Lemur (Pithecia leucocephala). The following characters 

 will be sufficiently diagnostic in view of future identifications: — Head 

 simple and unarmed, the mouth being bordered by six very slightly 

 elevated papillee; body uniform in thickness, but suddenly narrowed 

 at either end, both sexes presenting a conspicuous gland opening at 

 the ventral surface, about ^V of an inch below the oral margin ; tail 

 of the male strongly curved, sharply pointed, and furnished with 

 broad lateral folds, each about T y in length; spicules two, scimitar- 

 shaped, remarkably stout and short, the larger measuring not more 

 than tjV' lengthways ; tail of the female comparatively blunt, the 

 anus being; placed about -' T " from the tip. Males up to 1|"; females 

 li" to 2" long. 



The accompanying Plate (figs. 11-13) supplies three illustrations 

 of this worm, showing all the more essential characters above described, 

 and likewise, in addition, the presence of a supplementary caudal 

 appendage in the male, besides several stalked gland-ducts connected 

 with the lateral membranes. 



15. Ascaris andersoni, nov. sp. (Plate XXI.) 



On the 27th of September, 1875, I received a small parcel con- 

 taining entozoa from Dr. John Anderson ; and I was informed by 

 letter that all the parasites had been obtained by the donor from 

 hosts occupying the north-eastern province of India. 



In the series in question there were six examples of a small nema- 

 tode removed from the ceecum of a squirrel {Sciurus 1) . Two of 



the specimens were males, four being females. Believing them to re- 

 present a new species, I append the following diagnostic characters : — 

 Head simple, unarmed ; body finely drawn out in front and sharply 

 pointed behind in both sexes ; tad of the male furnished with a 

 minute oval-shaped spine at the tip, also with two long arcuate spi- 



