TAPE-WORMS OF THE SUB-FAMILY AYFrELLIXIX-E. 333 



Stilehia viTTATA, Railliet, 1896. Figs. 8, 9. 



Synonymy. 

 Stiles ill vittata. Railliet, 1896. 



Literature. 

 Railliet. — " Snr qnelques parasites du Dromadaire," ' C. R. Soc. Biol.,' 

 1896, p. 491. 



Habitat. — Small intestine of dfomedary. 



G-eographical Distribution. — India. (Algiers? The 

 type was collected in Alfort in a dromedary that died there, 

 and a second batch was collected at the same place about 

 two weeks after the first.) 



Stilesia vittata, Railliet. so closely resembles Stilesia 

 globipunctata (Rivolta), that Railliet, after describing the 

 species, states that it may be only a variety of Stilesia 

 globipunctata (Rivolta). However, certain constant 

 differences can be found, if one may rely on Stiles's descrip- 

 tion of Stilesia globipunctata (Rivolta), and there 

 appears to me to be no reason to doubt the correctness of 

 that most accurate observer. 



The worm has the same appearance (judging from for- 

 malin material) as Stilesia hepatica, Wolffhiigel, and as 

 Stilesia globipunctata (Rivolta). Its length is stated as 

 being 18 to 23 cm., its breadth 1 mm. to l"3mm. In shape 

 the scolex is similar to that of Stilesia globipunctata 

 (Rivolta) ; however, when viewed en face the breadth (latero- 

 lateral measurement) is somewhat greater than its thickness 

 (dorso- ventral measurement). Its length is shorter than the 

 breadth or thickness. 



Three scolices measured were : 

 Broad . (1) 0-60 mm. . (2) 0-54 mm. . (3) 0-55 mm. 

 Thick . (1) 0-525 mm. . (2) 0-48 mm. . (3) 048 mm. 

 Long . (1) 0-55 mm. . (2) 0-375 mm. . (3) 0-48 mm. 

 The shape of the proglottids is similar to that of the other 

 two species, the posterior border of each segment overlapping 

 the anterior end of the next pi'oglottid in the same Avay. 



