30 RECORDS OF THE AUSTRALIAN MUSEUM. 



Calcareous corpuscles are fairly abundant, rounded or elliptical 

 structures varying from 5-4/x, by 7/x to 7"5/x by 11/n. 



Tbe excretory system is similar to that described in Acoleus 

 Iiedleyi. The vessels are situated in the medulla well within the 

 musculature. The ventral stem is rather larger than the dorsal, 

 both possessing a fairly wide lumen. The latter lies some little 

 distance above the former, the male duct passing between them. 

 At the posterior end of each segment there are two transverse 

 excretory vessels, a dorsal and a ventral, connecting each dorsal 

 and ventral longitudinal trunk respectively. 



The only portion of the nervous system recognised was the 

 large longitudinal nerve situated laterally from the excretory 

 vessels. It passes just below the genital duct, being displaced 

 somewhat ventrally. 



The genital system is also characteristic and resembles that of 

 Cyrocoslia perversa as described by Fuhrmann 66 . The male 

 openings alternate irregularly and are located in front of the 

 middle. of the lateral margin of each proglottis. There is no 

 prominent genital papilla excepting when the cirrus is more or 

 less protruded. When the latter is at rest there is a narrow 

 canal leading from the genital pore to the male duct. Female 

 ■apertures are absent. The genitalia appear very early, the 

 uterus and other parts being recognised in the youngest segments 

 examined. 



The male organs consist of a small group of about five small 

 testes lying transversely in the middle of the anterior part of the 

 segment in front of the female glands and uterus, and approx- 

 imating to the dorsal surface ; they disappear early. A trans- 

 versely placed collecting duct receives their secretion. From the 

 middle of this duct the vas deferens passes forwards and then 

 laterally. It travels outwards, passing just below the dorsal 

 excretory vessel, to enter the cirrus sac. A small swelling or 

 vesicula seminalis may be present on the inner portion of the 

 duct. After entering the sac, the vas becomes thrown into a 

 few coils lying in the inner end of it. This narrow duct widens 

 to form the eversible cirrus, a wide tube of from 0033 to 067 

 mm. in diameter whose inner wall is thickly studded with slender 

 hooks possessing a small basal portion, and a delicate back ward ly 

 projecting portion - 006 nun. long. The sac as already mentioned 

 lies between the excretory trunks and above the longitudinal 

 nerve. It is a rather large organ of about 030 mm. in length, 



'Fuhrmann— Centr. Bakt., L, xxvi., 1899, pp. <il> ii:<'. 



