BY T. HAEVEY JOHNSTON, M.A., D.SC F L.S. S3 



The nerve ring lies at a distance of .015 mm behind 

 the mouth, and immediately in front of the ring is the 

 ■excretor}^ apertui*e. 



This larval parasite appears to belong to the Spirop- 

 teridae and is included for the present under the collective 

 generic name, Agamonema. 



Echinorhynchus h dee n sp. 

 (PI. X., figs. 8, 9.) 



A solitary specimen of this species was found recently, 

 encysted just below the peritoneal surface of the liver of 

 a frog, Hyla ccerulea, caught near Brisbane. The white 

 cylindrical cyst measured 1.4 mm in length and about 

 .5 mm in width. 



Though the parasite was in a larval stage, yet enough 

 of its anatomy Avas recognised to justify naming it. I 

 have compared it with an Echinorhynch which was 

 described b}^ me in 1912,* from a Hyla aurea caught near 

 Sydney some years ago and am satisfied that the two 

 belong to the same species. They have the same 

 size and general appearance. The characters of the ros- 

 tellum are described there. In our present specimen 

 this organ is not fully everted but the hooks on its 

 base correspond in shape, size and arrangement with those 

 similarly placed in the case of the former parasite (fig. 9). 



The rostellar sac Avith the introverted rostellum 

 measured .9 mm in length. One giant nucleus was dis- 

 tinctly seen, and there appeared to be a second one present. 

 Each lenmiscus measured . > mm, being of about the same 

 length as the introverted proboscis. They were rather 

 shorter than those present in the specimen from Hyla aurea. 

 The suspensory ligament and associated organs were con- 

 siderably coiled and consequently the details of structure 

 were not satisfactorily made out. Sex glands were not 

 recognised, though the vas deferens, vesicula, and the re- 

 latively large copulatory bursa were to be seen. The waUs 

 of the bursa were :hick and much folded internally. The 

 general anatomy is shown in pi. X. fig. 8. 



*Proc Roy. Soc. Queensland, XXIV., 1912, pp. 84-85, pi II. figs. 9, 10 



