ART. 6 XEW FORMS OF ISTEMATODE WOr^MS CHANDLER 5 



with the sides rolled to form troughs; right spicule about 130/x long, 

 the left one about 300^ long and curved more or less to follow the 

 ventral contour of the body. 



Female. — Unknown. 



Host. — Dhyal bird or magpie robin {CopsycJius saulatus). 



Location. — Orbital cavity. 



Locality. — Calcutta Zoological Garden, Calcutta, India. 



TyjJe specimen. — United States National Museum Helminthologi- 

 cal Collection No. 8006. 



DIROFILARIA (?) DIGITATA, new species 



Figs. 3 and 4 



Specific diagnosis. — ?Dirqfilaria : 



Male. — Unknown. 



Female a long slender worm, attenuated at each end to a very 

 slender head and tail, [jength 170 to 210 mm. with a maximum 

 diameter of about 380m. Cuticle smooth, unstriated, and without 

 other ornamentation. Head very slender, with a diameter of about 

 55/i to GOju. Mouth opening extremely minute, without lips or evident 

 papillae, and no vestibule present. Esophagus very fine and slender, 

 only about 11/x to 12m in diameter, and not easily observable except 

 where it is bent and runs at an angle to the long axis of the body. 

 The junction with the intestine is not sharply demarcated, the intes- 

 tine tapering conelike to the junction with the esophagus. The 

 esophagus is about 1.1 to 1.3 mm. in length; nerve ring about 160^ 

 from the anterior end. The anus is a very minute opening, situated 

 about 330m from the tip of the tail. The intestine in the last half 

 millimeter of its length tapers down to a narrow tube of uneven 

 diameter. The vulva is a longitudinal slitlike opening, bounded by 

 slightly salient lips, situated just anterior to the junction of esophagus 

 and intestine. The lumen of the anterior part of the vagina is 

 narrow, and the wall is very thick and muscular (fig. 3), but a few 

 hundred micra from the vulva the lumen widens and the wall narrows. 

 The uterus bifurcates about 4 to 5 mm. from the anterior end of the 

 body and the ovaries terminate a short distance anterior to the anus 

 in the posterior part of the body. The tail of the female (fig. 4) is 

 long, slender, and cylindrical, 40m in diameter, and bluntly rounded at 

 its termination, where it bears two pairs of digitiform papillae as 

 shown in figure 4. 



Host. — Hoolock ape {Hylohates hoolocTc). 



Location. — Abdominal cavity. 



Locality. — Calcutta Zoological Garden, Calcutta, India. 



Type specimens. — United States National Museum Helminthologi- 

 cal Collection No. 8007; paratypes No. 8008. 



