550 



DR. ROBERT T. LEIPER ON NEW 



well developed bursa that projects much more ventrally than 

 dorsally (text-fig. 140, B). The genital cone (text-fig. 140, B,y.c.) 

 is greatly developed and can be seen projecting between the two 

 sides of the bursa and the dorsal membrane. The dorsal membrane 

 is distinctly delimited from the lateral halves of the bursa and is 

 very much shorter (text-fig. 140, C). 



Text-fio-. 140. 



Achcil nstoma sinipsoni. 



A. Anterior extremitj' showing mouth capsule m.c, (wsophagus ces., lateral 



cervical papilla l.p. 



B. Bursa of male, lateral view: ff.c, genital cone; sp., spicules. 



C. Bursa showing division of dorsal ray. 



D. l?ase of mouth capsule showing chitinous folds of the wall of the capsule 



guarding the oesophageal orifice. 



The dorsal ray is short and thick and bifurcates about halfway 

 along its length to form two stout rays, which are again split into 

 two subdivisions as they reach the edge of the bursal membrane. 

 The externo-dorsal rays leave the dorsal ray from about the 

 middle of the thick undivided portion. The ventral rays are 

 fairly well developed and are united to their tips. All the lateral 

 rays, middle and posterior, run to the bursal edge almost side by 

 side, but the anterior ray, which has a thickness almost equal to 

 the two central rays combined, takes a separate course, ending 

 about one-third of the distance from the midlateral to the 

 ventral rays. (Collected by J. J. Simpson, Esq.) 



