>^4 NOTES OK SOME ENTOZOA. 



The females may reach a length of 32 mm., the males 

 being much smaller (12 mm. long). The body is firm and 

 whitish, the cuticle being smooth or crinkled transversely* 

 The proboscis is nearly spherical, measuring -76 mm. 

 across, and bearing about seven spirally-arranged series 

 of hooks, each series consisting of twelve to sixteen hooks'] 

 according to their position on the proboscis. The hooks 

 are i)owerful structures, consisting of a relatively strong 

 basal portion and of a stout back wardly- projecting hook, 

 surrounded at its base by a small collar. The posterior 

 •end of the male is slightly narrowed, and bears the male 

 gonopore. The extremity of the female is slightly swollen 

 and bifid, there being two prominent lobes between which 

 lies the genital aperture. 



The following accoujit is taken from a male. The 

 proboscis sheath is an elongate sac l(i mm. long. The 

 lemmisci are extremely long, extending through the 

 anterior three- fourths of the })arasite. The two rounded 

 testes lie just in front of the middle of the worm. Their 

 long diameter is nearly a millimetre. The vasa deferentia 

 unite to form a large swollen convoluted vesicula 

 seminalis, the lower i)art of which is a sac-like structure 

 succeeded b}- the ejaculatory duct. The latter terminates 

 at the small bursa which in turn communicates with the 

 exterior through the male gonopore. 



The vagina or uterus is long and thin. Eggs measure 

 •087 mm. in length, the embryos being -043 mm. long. 



Echirwrhi/ncJius, sp. 

 (PI. II : Figs. 9, 10). 



Last year, I found a larval echinorhynch encysted 

 in the peritoneum lining the body wall of a common golden 

 frog, Hyla aurea, near Sydney. The length, excluding the 

 Tostellum which measures -72 mm. when everted, reaches 

 1-53 mm. The rostellum bears about twelve whorls of 

 hooks, each whorl consisting of about sixteen. The hooks 

 (Fig. 10) possess a stout basal portion, and of a long sharp 

 claw partly surrounded by a collar- like outgrowth of the 

 rosteUar cuticle. The entire hook, when measured from 

 the point to tbe upper end of the base^ reaches a length of 

 •150 mm., of which 115 mm. protrudes. The rosteUar 

 sheath is relatively short, tbe lemmisci being much longer. 



