96 



Mr. H. A. Baylis on a new Species of 



respectively (in a straight line from base to tip) about 

 0*44 mm. and 0*24 mm. The caudal papillae are rather 

 large and conical. There are ten pairs, four preanal (fig. 2, 

 I-IV) and six postanal (fig. 2, 1-6). The fourth preanal 

 pair {IV) and the fifth postanal (5), counting from the tail- 

 tip, are laterally placed. The second postanal pair (2) are 

 actually dorsal in position. 



The body of the female narrows suddenly at the base of 

 the tail. The anus opens in a transverse fold of the cuticle, 

 which is followed by several wrinkles. The tail tapers to a 



Fig. 2. 



C'rossocephalus longicaudatus. Lateral view of the tail of the male, 

 highly magnified. 



S., spicules ; 1-6, postanal papillae ; I-IV, preanal papillae. 



fine point, and is 1*7 mm. to 1'9 mm. long. The position of 

 the vulva has not been made out with certainty, but it is 

 probably very close to the anus. The uterus contains 

 embryos in various stages of development, not always enclosed 

 in an egg-membrane, and often of very large size, so that the 

 species is evidently viviparous, like the type-species. 



The chief points in which this species differs from C. vioi- 



