148 MOLLUSCA OF THE 



Mount Damoes, but I do uot venture to describe new spe- 

 cies in so difficult a genus on so little materials, unless 

 the characters are very prominent. 



5. Microparmarion litteratus, n. sp. 

 (Plate 2, fig. 2). 



Body reddish grey, with black shades on the neck, the 

 upper part of the head , a space on the forepart of 

 the body above the margin of the foot , and the upper 

 part of the tail , with the exception of the keel ; the mantle 

 with its lobes is sprinkled with irregular black spots, flowing 

 together here and there and making the appearance of 

 scripture; foot with its margin unspotted. Mucous pore 

 with a horn above. Keel of the intestinal pouch rather 

 obscure on the right side, more prominent on the left one. 

 The part of the mantle surrounding the posterior part of 

 the shell is membranaceous , giving the lateral parts 

 the appearance of free lobes , like in Helicarion. The shell 

 is very thin, wrinkled, greenish yellow, and shows traces 

 of a volution. A large genital pore may be observed near 

 the right side of the head. 



Length of the animal (in spirits) about 30, that of the 

 mantle 17 mill.; breadth of the foot nearly 3 mill. 



Locality: Top of Mount Damoes, near Sambas, 1100 — 

 1300 feet (Hallier). 



I have placed this species in the genus Microparma- 

 rion , on account of the volution of the shell , which at 

 once distinguishes it from the former two species. The fact 

 that the mantle looks interrupted posteriorly is, as far as 

 I know, peculiar. The mantle is so strongly contracted as 

 to expose also the under part of the intestinal pouch , 

 which seems to be covered by a very thin layer of the 

 shell , somewhat like in the next species , where the lobes 

 of the mantle are free posteriorly. It is very desirable that 

 larger series of this and allied forms may be collected, 

 to permit a more accurate examination of the exterior and 



Notes frora the Leydeix IMuseum, Vol. XVII. 



