ASCARlDiE. 



81 



terns. The male is comparatively small ;«lias tlie tail gracefully 

 coiled upon itself towards the ventral aspect, and is in this situation 

 often furnished with two membranous, winged appendages, laterally 



Fig. is.— Two specimens of Ascaris osculata, Eudolphi ; from the stomaxjli of the common seal 

 {Phoca vitulina). Male and female. Natural size.— Original. 



disposed, so as to assist in the copulatory act. Sometimes also there 

 are two rows of papillse or tubercles, and occasionally a sucking- 

 disk whicli is placed immediately in front of the anus (Dujardin). In 



Fig. 19.— Caudal extremify of a male Ascaris reiusa, Eudolphi ; from the rectum of a Weasel- 

 headed Armadillo (Dasi/jnis seoccinctus) . X 25 diam. — Original. 



the female the tail is usually longer and straight ; the vulva bemg 

 situated, ventrally, a little way in advance of the centre of the 

 body. The eggs are either elhptical or globular ; several of the 



species being viviparous (Dujardin). 



M 



