398 Mr. W. E. Collinge on some 



normal condition this organ has a well-defined receptacular 

 duct and a globular head. In the first specimen (PL VII. 

 fig. 1) there is no duct, the head being somewhat beak- 

 shaped, with a long neck surmounted on a globose base, 

 a slight constriction separating the basal portion from the 

 neck portion. In this specimen the penis is rather longer 

 than in the other specimens dissected (PI. VIL fig. 1, p.). 

 In the second specimen (PI. VII. fig. 2) there is also no 

 tiace of any receptacular duct, the receptaculum seminis being 

 somewhat pyriiorm in shape. A further variation in these 

 two specimens is to be seen in the length of the retractor 

 muscle of the penis. In the first one it measures 6"5 millim., 

 while in the second it is 30'5 millim, 



2. Parmarion Weheri, Simr. 



IJab. Geda. Three specimens. 



I have exjerienced great difficulty with this species; it 

 seems to be the most variable of any of the Malayan Par- 

 marions. All the specimens are full-grown, measuring (in 

 alcohol) 48*5, 50, and 52 millim. respectively. In one 

 specimen the mantle-lobes and head are a deep sepia-brown, 

 while the sides of the body are a yellowish green. The foot- 

 sole has a yellowish median plane, with faintly coloured 

 sepia lateral planes. The remaining two specimens have 

 reddish-brown coloured mantle-lobes, with the head and sides 

 of the body a pale yellowish green, approaching the form 

 figured by Simroth (3, t. vii. fig. 6 b). None of my specimens 

 are so darkly coloured on the sides of the body as that shown 

 in figure 6 a {op. cit.) by Simroth. 



3. Parmarion ? 



Hah. Surabaja. One specimen. 



A small species measuring (in alcohol) 24 millim. is exactly 

 like Simroth's drawing of P. camhodjensis (4, t. xv. fig. 10) ; 

 but Simroth says that P. cantho<ljins{s approaches most 

 closely to P. A/artensiy so mine cannot be this former species, 

 as the mantle is perfectly pmooth, there being no trace of any 

 wart-like markings. Having only a single specimen, it is 

 difficult to say what it is. 



MiCROPARMAKION, Simr. 



4. Microparmarwn Austeni^ Simr. (PI. VII. figs. 3-10.) 



Hah. Geda. Three specimens. 



Eefcrring to this species in 1893 Simrnth writes : — "Das 



