116 



s. GOTO. 



nuclei, /. c, those whose nuclei have not met the section, are seen to 

 contain one or several vacuoles in their protojtlasin (1*1. XV], fig, 5). 

 The top of eacli pilaster is seen in section to bear nunienjus cilia. As 

 "we recede from the ootyp, the pilasters heconie more and more flattened, 

 the ciha become longer, and the nuclei finally disappear altogether ; 

 but the pilasters are still separated by a shtdlow furnjw, (1,-*1. XVI, 

 fig. (3). As we recede still farther from the ooty}) the pilasters 

 finally disappear entirely, i. c, the protoplasmic remnants of the original 

 epithelium have almost wholly disappeared, and the inner surface of 

 the uterine wall is covered uniformly -with long, stout cilia (IM. XV^, 

 fig. 10 ; PI. X\'I. fig. S). In this genus there is no genital atrium, 

 and the uterus consequently opens directly to the exterior l)y means of 

 a small pore (1*1. X\'I, fig. 7). 



jMonticelli" thinks that in (Jndwcoiijlc the terminal ])orti(jn of 

 the uterus is specialised int(^ an "■ ovidotto esterno"; but 1 think the 

 enlarged portion figured by Taschen her g is due to the eggs that 

 are contained therein. So far as I have observed there is in the Mono- 

 ii'enea no speciidised portion corresponding to Monticelli's "ovidotto 

 esterno." 



In most sp^icies of Trisloiiiiiin I he [)osterior end <jf the uterus is. as 

 already stated, enlarged into the shape of a funnel witli its mouth 

 directed towards the ootyp, the front attenuated end of which 

 projects into it. It is usually of uniform size throughout the 

 rest of its extent ; but in Trist, siiuiaiinn I have ol)served it 

 nndern'o another enlaru'ement and then to 1)e reduced to a narrow canal 

 of uniform calibre (PI. XXII, fig. 2). The wall is in all cases formed 

 througliout of a thin, structureless membrane. In Trisl. ovale and 

 Trist, rot (in lain the uterus opens directly to the exterior, cl(3se beside 

 the male genital opening (PI. XXIII, fig. <S ; PI. XX I V^, fig. (5) ; but 



1). Monticelli— Priuio coutriljuto etc. p. 118. 



