f533 



29. TAENIA EXILIS UuJarUlii 1815. 



Dujaidin j>roposed this name for a tapeworm found 

 in chickens, but the description is so insufficient that 

 the species should be i«;nored entirely. The original 

 description reads : 



"Je proposerai de nommer Taenia exilis un autre taenia de 

 la poule, bien different aur-si des precedents, mais dont je 

 n'ai pas encore eu la tete: il est long de 20mm a (?). large de 

 0.l5"im en avant ,et de 0.95iiim en arriere, forme d'articles courts, 

 transverses; les orifices genitaux sont unilateraux; les penis 

 sent lisses, assez longs, larges de 0.015mm precedes par une 

 ample vesicule seminale. remplie des spermatozoides en eche- 

 veau; les oeufs, presque globuleux, ont trois enveloppes; 

 I'externe longue de 0.0r)6mm a 0.065mm; la moyenne de 0.054mm: 

 I'interne de 0.032mm; remlbryon, long de 0.025mm, a des crochets 

 long de 0.0125mm." 



Airlong (1875, pp. 427-431) claims to have found the 

 same worm, although it is not at all evident why he 

 should think his form identical with Dujardin's 

 species. He gives the following characters: 



Head is 0.48mm long by 0.60mm broad, suckers orbicular 0.20mm 

 diameter; rostellum short 43 fx in diameter, with a simple crown 

 of 60 hooks 8 fi long; neck 5mm long by O.lSmm broad; segments 

 much broader than long; anterior segments 0.33mm to 0.37mm 

 by 49 p. to 50 fi. then Immi by 0.12mm; middle segments 1.5mm 

 (anterior border) to 1.8mm (posterior border) by 0.6mm. Genital 

 pores unilateral in anterior third of segment. Penis 36 /* by 6 

 fi. Eggs globular, outer memibrane 58 fi to 64 //. inner mem- 

 brane 30 fi to 32 fi: hooks of oncosphere 16 fi. 



80. TAENIA IMBUTIFORMIS Polonlo, 1860. 



(1893, Mesocestoides imbutiformis (Polonio, 1860) Raillict.) 



[PI. XX, fig. 263.") • 



Diagnosis: 8mm long, head small, suckers circular. Neck ab- 

 sent. Posterior portion of strobila thick, anterior segments 

 linear; following segment.s bell or funnel shaped; posterior seg- 

 ments linear bell-shaped. Genital pores situated on one of the 

 surfaces of the segments. Development: Unknown. 



