328 ON SOME TRBMAXODE PARASITES OF AUSTRALIAN FROGS, 



type is very common, for in 38 cases out of 86 worms ex- 

 amined for tliis character, the five testes and the ovary lie 

 on the right side instead of the left. The ovary is marked oil 

 into several lobes (generally four), by comparatively shallow 

 grooves. The oviduct, after a short course to the side, turns 

 and runs towards the middle line, at the same lime widening 

 out somewhat to form the fertilisation-space ; reduced again 

 to a smaller calibre, for a short distance, it soon widens again 

 to form the ootype, at the commencement of which the short 

 Laurer's canal is given otf, which, after a very short, direct 

 course, opens on the dorsal surface (Fig. 66). As is usual in 

 Gorgodera, there is no receptaculum seminis. The yolk-reser- 

 voir, given off from the short, transverse, vitelline duct, opens 

 into the distal end of the ootype. The shell-gland takes the 

 form of a rounded mass of cells lying on one side of the 

 ootype, in the space between the anterior ends of the yolk- 

 glands. The receptaculum seminis uterinum, the next division 

 of tne female duct, is a more than ordinarily large section, 

 and occupies a number of coils that lie partly in the middle 

 of the body, and partly laterally, outside the intestine on 

 one side (Fig. 68). The coils of the uterus are narrow, but 

 very numerous, running down the middle near the ventral 

 surface, and ascending again nearer the dorsal surface, both 

 ascending and descending limbs sending out, laterally, loops 

 between the testes, each loop extending out to the edge of the 

 body, and forming a coil of several turns in the space between 

 the testes and the lateral edge of the body (Fig. 67). The 

 ascending coil having reached the region in front of the ovary 

 and behind the vesicula seminalis, makes several transverse 

 turns almost right across the body (Fig. 64), then runs for- 

 ward behind ana partly to the side of the ventral sucker, the 

 final part of its course lying parallel to the ejaculatory duct. 

 The yolk-glands take the usual form of a pair of compact 

 glands lying in front of the ovary, joined by a wide trans- 

 verse duct, each gland being composed of 3-6 well-marked 

 lobes. 



