442 W. N. F. WOODLAND 



C. 1 a t i c e p s and other previously described Caryophyllaeids — 

 is in W. virilis normally extremely long (PI. 24, fig. 2, povr) 

 and very characteristic of the species. The only part of the 

 genitalia it contains is an enormous posterior development and 

 extension of the vitellaria (vit), the two marginal strands of 

 which these organs consist in the uterine and testicular regions 

 here merging immediately behind the ovary into a more or less 

 central core of scattered vesicles. The posterior extension of 

 the vitellaria differs in different specimens. In my largest 

 52-5 mm. specimen and in a specimen only measuring from 

 11 to 12 mm. the vitellaria only extend about half-way down the 

 post-ovarian region (PI. 24, fig. 1, a), whereas in most other 

 specimens (PI. 24, fig. 2) the vitellaria extend nearly to the 

 extreme end, but intermediate conditions doubtless exist, 

 though I do not possess an example. At the extreme posterior 

 end of this region there is developed a distinct muscular thick- 

 walled vesicle (PI. 24, fig. 2, texb), into which open the terminal 

 excretory channels (excv). 



I must mention finally that in two of my specimens the curious 

 abbreviated condition of the post-ovarian region shown in 

 PI. 24, fig. 9, was found. This condition may be due merely 

 to extreme local contraction, but since the concentration of the 

 vitellaria hardly seems to be sufficiently great on this supposi- 

 tion, it is possible that in these two specimens the hind end of 

 the animal had become detached during life and a new posterior 

 extremity regenerated on the stump. 



A brief description of other features of W . virilis remains 

 to be supplied. The only portions of the nervous system my 

 material allowed me to make out are the two main longitudinal 

 marginal trunks (PI. 24, fig. 4, n) already described as joining 

 (jn) at the extreme anterior end of the head. I could not 

 detect the other longitudinal nerves which have been described 

 by Will (27) in C. laticeps, though possibly restaining of 

 my material by special methods would display them. 



The excretory system (PI. 24, fig. 13) posteriorly was well 

 observed in one of my specimens owing to accidental injection 

 with some foreign substance. It consists at the extreme 



