442 THOS. H. MONTGOMERY jr., 
Literature on excretory organs. VEJDOVSKY (1886) de- 
scribes the medio-ventral body cavity, which he was the first to 
discover, as an “Excretionsröhre”, on the basis of finding a fluid 
coagulum within it; but he regards it as without a morphological 
equivalent in other groups. Later (1894) he considers it to represent 
the “primäre Leibeshöhle”. He also describes under the name “braune 
Driise” a rudimentary tubular structure composed of large cells, the 
“Drüsenkörper”, and an “Ausführungsgang” which opens into the 
oesophagus; this organ, not found in the adult, may possibly cor- 
respond to what I have termed the “supra-intestinal organ”. 
VILLOT (1887, 1889b, 1891) considers the “cavité péri-intestinale” 
to be a space formed by the “regression” (shrinkage) of the intestine 
in the adult stage, and by the fatty degeneration of the parenchym. 
He regards (1889a) the hypodermis “bien un appareil aquifére, qui 
communique avec l’exterieur par les canalicules et les pores de la 
cuticule”. 
von Linstow (1889) regards the periintestinal space as the only 
body cavity in the adult, but opposes VespovskY’s view that it is an 
excretory organ. 
CAMERANO (1897b) states: “Non vi & traccia sicura di apparato 
circolatorio e di apparato escretore, almeno nello stato adulto.” 
‚X. The Female Genital Organs. 
These consist of the ovaries (Ov Fig. 78, Pl. 42), segmentally 
arranged sacks placed on the right and left sides of the body, and 
extending from the anterior region of the trunk in front nearly to 
the anterior end of the atrium (Air) behind; the uteri (Ué), a pair of 
tubes suspended in the dorso-ventral mesenteries, and having the same 
extent as the ovaries; the oviducts (Ovi), the posterior narrowed con- 
tinuations of the latter, and which connect with the dorso-lateral 
angles of the atrium (Air), a glandular sack; the receptaculum seminis 
(Rec), a long sack extending forwards above the nerve cord and 
opening posteriorly into the anterior end of the atrium; and the 
cloaca (P.Cl, Cu.Cl), a long tube starting at the point where the 
intestine (P. Int) connects with the posterior end of the atrium, and 
passing backwards to the cloacal aperture situated between the tail 
lobes: D7. i, TEE). 
The appearance of the genitalia varies in different individuals, 
according to the stage of the reproductive activity. In individuals 
