ASCABIS TYPICA. 



129 



duplici Rubterminali, feminse subrecta. Penis apertura genitalis feininea infra corporis medium sita; 

 uterus simplex, ovariis et oviductibus dnobus. Ovipara. In Cetaoeorum ventrioulo endoparasita. 



Echinorliyncliorum more caput totum in corpus retractile. 

 I. Conoceplialua typieus Diesing. Tab. I, fig. 1-11. 



Corpus subaequale, transverse striatum. Os minimum. Longit. mar. ad 2", erassit. ad J" ', 

 feminae ultra 2", orassit, 1" ', longit. capitis ad J" '- 



Ilabitaoulum. DelpMnua (DelpMs?) : in veutriculo, in oceano atlantlco sub latit. b. 20"^ et longit. 

 occ. 39° (Mus. Safniense). 



CI. Steenstrup specimina nouuulla generis bujus insignis Museo Caesareo Vindobouensi dono 

 obtulit. 



Krabbe (1878, pp. 49-51, r6sum(5 12) states that tlie worms Diesing obtained from 

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



Fig. as. 



Fig. 36. 



JJorsoL. 



Fig. 34. 



Fig. 35. 



JTentr&l. 



Fig. 37. 



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

 material Krabbe convinced himself 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 in terepr station by the fact that when this 

 author published his Eevision der Kematoden 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 Uchinorhynchus, in reality exhibits 

 the lips without foreign appendage. 

 594=7— PT 3 ^9 



