Two neio Species of Slugs. 1 93 



Affinities. 



Externally this species is not unlike a small example of 

 Parmarion intermedium, Cllge., to which it is undoubtedly 

 closely related. It possesses the same characters in the form 

 of the penis as are common to P. pupiUaris, Humb., P. Weberi, 

 Simr., P. Martensi, Simr,, P. intermedium, Cllge., P. Everetti, 

 Cllge., and other species, viz. division into three portions, the 

 third or distal one being beak-shaped. The peculiar shaped 

 solid dart is unlike that of any other species of Micro- 

 par mwion or Parviarion. 



Microparmarion constrictus, sp. n. 

 (PI. IX. figs. 6, 7.) 



Externally this species is not unlike Parmarion inter- 

 medium, Cllge. ; it differs, however, from that species in its 

 smaller size, slightly lighter colouring, the smaller size of 

 the mantle- lobes, and the lighter lateral planes of the foot- 

 sole. Godwin-Austen * has previously drawn attention to 

 the few distinguishing characters in the outward appearance 

 of the species belonging to the genus Parmarion, and these 

 apply with equal force to the species of Microparmarion. 



Length (in alcohol) 35 millim. 



IJah. Lombok (1500 feet), Borneo {A. H. Everett). 



Anatomy of the Generative Organs. 



The sessile receptaculum seminis at once indicates this 

 species to belong to Simroth's genus Microparmarion. The 

 penis (PI. IX. fig. 6, p.) commences as a large bulbous 

 organ, which forms the tirst division ; the second portion is as 

 in other species where the three divisions obtain, while the 

 third terminates in a blunt beak-shaped head. I'he retractor 

 muscle is attached to the inner side of the third division. 

 The vas deferens passes off from the third division of the 

 penis, slightly above the point of separation between the 

 second and third divisions. The free oviduct, as in most 

 species oi Microp>armarion, is short. Tlie dart-sac is peculiar 

 in form, being much folded and twisted upon itself (PI. IX. 

 fig. 6, d.s.) ] when unfolded it is as represented in figure 7. 

 There was no dart present in the sac, which probably 

 accounts lor the manner of folding &c. 



Affinities. 

 There seems lo be little relation between this and any ot 

 * Alh. & Mag. Nat. Hist. 1895, vol. xvi. pp. 434-437, pi. xix. 



