BY S. J. JOHNSTON. 307 



across to meet in the middle of the body, forming a dorsally- 

 placed row posterior to the ovary. 



The eggs are large (0132 mm. long, by 0066 mm. broad), 

 with a thin, hyaline shell : many of them contain ciliated 

 embryos. These measurements are smaller than those given 

 by Looss (46) for the mature eggs of ]). suhclavatus, viz., 

 O-l-t X 0-07 mm. Dujardin's figures are 0-13 mm. long, while 

 •Stetti states the length as 019 mm. (4, p. 766) ; perhaps Stetti 

 had to do with an independent species. 



DiPi.oniscus MiCROCHRUs, sp.n. 

 (Figiire 30.) 



Diagnosis. — Small, subclavate worms, about 1-2 mm. long, 

 by 0-85 mm. wide. Suckers large ; ratio of anterior to pos- 

 terior, 3:8. Diverticula of the oral sucker well-developed; 

 oesophagus long ; pharynx well-developed, and placed at the 

 posterior end of the oesophagus ; intestinal limbs very wide 

 and short. Excretory pore at the extreme posterior end of 

 the body. 



The single testis rectangular, laterally placed, near the 

 middle of the body ; a large vesicula seminalis ; copulatory 

 organs present. Ovary 'pear-shaped, behind the testis. Vitel- 

 line glands compar-atively small, in a double row along the 

 sides of the body and across the body behind the ends of the 

 intestinal limbs. Coils of the uterus as in the last species. 

 Eggs thin-shelled (0125x0067). 



In the rectum of ffj/la eivingii and Limnodynastes tas- 

 maniensis. 



Type-specimen in the Australian Museum, No. W. 333. 



Of this little species, I have obtained three specimens from 

 Limnodynastes tnsmaniensis, and one from Hyla eiringii. 

 It differs from the preceding species mainly in the smaller 

 size of the body, and the comparatively (to the size of the 



• fj.iKpo<i, small ; wxpoi, yolk. 



