1922.] H. A. Baylis and R. Daubney : Parasitic Nematodes. 319 



are connected by narrow ducts with the respective ends of the latter. The develop- 

 ment of the embryos appears to be very rapid, the uterus being entirely filled, from 

 end to end, with young apparently fully-formed 

 and not enclosed in membranes. These em- 

 bryos have, as v. Linstow observes, a cuticle 

 marked with conspicuous transverse striations, 

 a blunt head and a long, tapering tail. 



The tail of the adult female (fig. 54) is 

 rounded at the tip, and measures 0'2-o - 35 mm. 

 in length. At o # i-0'i4 mm. from the tip, and 

 somewhat towards the ventral side, there is a 

 pair of large, prominent caudal papillae. 



This genus, with the uteri directly opposed, 

 ,, -, t -. j. , , c . , , , , , Fig. 54 — Micropleur a vivipara. Tail of 



the vulva placed tar back from the head, the f ema j e . ven tral view. 



short ovaries, and the spicules of the male (ac- p., caudal papilla. 



cording to v. Linstow) of equal length, does 



not appear to fit very well into any existing subfamily of Filariidae. It seems 



justifiable, therefore, to regard it as the type of a new subfamily, Micro pleurinae. 



Superfamily SPIRUROIDEA, Railliet and Henry, 191 5. 



Family SPIRURIDAE, Örley, 1885. 



Subfamily ACUARIINAE, Railliet, Henry and Sisoff, 1912. 



Genus Acuaria, Bremser, 181 1. 



Acuaria (Acuaria) anthuris (Rud., 1819). 



One female, which we assign to this species, was collected from the Red-billed 

 Blue magpie (Urocissa occipitalis). 



Acuaria (Echinuria) leptoptili (Gedoelst, 1916). 



(Figs. 55, 56.) 



This form was collected from the Adjutant (Leptoptilus dubius), at Calcutta. 

 The species was described by Gedoelst (1916) from females only. The type host was 

 Leptoptilus crumenifer, 



The females in the present collection measure from 13 to 15 mm. in length, and 

 about 036 mm. in thickness ; the males 11 to 11*5 mm. and 0^234 mm. respectively. 

 The cuticle has fine transverse striations about 4 n apart. At the anterior end it is 

 ornamented with " cordons." These cordons actually consist of a continuous band 

 folded so that two folds lie dorsally and two ventrally. The transverse portions of 

 the band are arranged so that they run across the lateral lines posteriorly and across 

 the dorsal and ventral surfaces anteriorly. The cordons are o - 02 mm. broad and they 

 extend backwards to a point about 11 mm. from the anterior end. The posterior 

 transverse portions show a slight forward bend as they cross the lateral lines. The 

 disposition of the longitudinal portions is not markedly asymmetrical or inclined to- 



