ASCARIS TYPICA. 



129 



duplici .subtoriuiniili, feuiiuii' subrecta. rouis iiperturii genitalis fcminca infra corpoiia niediuiu sita; 

 uterus simplex, ovariiset oviductibus dnobus. Ovipara. lu Cetaceoruni vontriculo endoparasita. 



Echinoibyncbonim more caput totum iu corpus retractile. 

 I. Conoieplidhis typkus l)i(.*sing. Tab. I, lig. 1-11. 



Corpus subaeciuale, transverse striatum. Os minimum. Lougit. mar. ad 2", crassit. ad f '' ', 

 femiuao ultra 2", crassit, 1" ', lougit. capitis ad f " '. 



Habitaculum. Dclphiniis {Delplils?): iu ventriculo, iu oceano atlautico sub latit. b. 20^ ct longit. 

 occ. 39° {Mus. Hafniensc). 



CI. Steenstrup specimina uounulla geueris hujus insignis Museo Caesareo Vindobouensi dono 

 obtulit. 



Krabbe (1878, pp. 49-51, resume 12) states that the worms Diesing obtained from 

 Steenstrup were collected by Captain Hygom, and that several were retained iu the 



Kg. b3. 



UorsaL. 



Fig. 34. 



Fig. 35. 



Ventral. 



Fig. 37. 



Zoological Museum of the University of Kopenhagen. Upon examination of this 

 material Krabbe convinced hiraseli" that the supposed hood on the head was composed 

 only of coagulated mucus and epithelial cells from the mucosa of the host. When this 

 is separated from the head, three lips are seen and an impression of the lips is noticed 

 on the inside of the hood. Krabbe has noticed similar structures on ascarides of 

 seals, and he explains Diesing's error of interepretation by the fact that when this 

 author published his Kevision der Nematoden he was blind, and able to work only by 

 the aid of others. Diesing's fig. 8, in fact, which is supposed to represent the head 

 retracted into the body similar to the proboscis of Uchmorhynchus, iu reality exhibits 

 the lips without foreign appendage. 

 5947— PT 3 9 



