66 



In the female there are two ovarian tubes, anterior and 

 posterior, which with their oviducts lie densely folded along 

 the intestine, nearly hiding the latter in the greater part of 

 the length of the worm. These unite into a short and incon- 

 spicuous uterine and vaginal tube, which opens ventrally 

 at an easily overlooked vulvar orifice (Fig. 1 , v) within the first 

 third of the length of the worm. Ova (Fig. 7) are colorless, 

 elliptical in shape, with thick walls, each containing a more 

 or less well-developed larval worm. They measure as an 

 average 38 micromillimeters in length and 18 micromillimeters 

 in transverse diameter (small examples as low as 34 x 16; 

 largest examples as high as 42 x 20 micromillimeters). 



The larval forms met were, as a rule, but 2 or 3 millimeters 

 in length, and often showed some appearance as of undergoing 

 moult, the old cuticle separating about the tail end of the 

 worm. The mouth parts were less complex than in the 

 adults. In the young sexual forms about the only feature 

 of importance noted was the fact of the lack of development 

 of the bursa by the formation of the lateral caudal expansions, 

 the papillae being, however, seen as in the older examples. 



Spiroptera (?) iguana, n. s. (Plate X, Figs. 1 to 3). 



From the lung of a Cuban iguana, Cyclura nubila (P. Z. G. 

 Lab., 1127), a single specimen of a nematode worm (Path. 

 Hist., 1641) was submitted for identification, in bad state of 

 preservation, and for this reason mainly permitting only the 

 following features to be determined. The worm, a male, 

 measured 30 mm. in length and at its thickest level (near 

 middle of length) 0.6 mm. in thickness. It was colorless, 

 rigid, subcylindrical, nearly uniform in thickness for the 

 greater part of its length, but anteriorly tapering to a rounded 

 head end (which at 0.02 mm. back of the mouth measured 

 0.14 mm. in diameter), and posteriorly terminating in a 

 bluntly conical, enrolled tail with rounded tip. Cuticle 

 finely striated transversely; worm polymyarial. Mouth 



