160 PARMARION. 



P. EXTRANEUS, Ferussac. PL 37, fig. 70. 



The shell is said to be " a thin horny pellicle without 

 appearance of a spire." The figure which I give from Semper 

 appears similar to that of Ferussac, but drawn with more atten- 

 tion to detail ; it is taken from a specimen received from Cal- 

 cutta. Godwin-Austen, however, doubts both the identification 

 and its locality, unless it may have been imported into the 

 Botanical Gardens there, with plants. Ferussac gives no 

 localit} 7 . 



P. PUPILLARIS, Humbert. PL 37, figs. 71-74. 



Shell calcareous, thin, oval, wider and less rounded anteriorly, 

 slightly convex, feebly striate by growth-lines ; the amber-colored 

 epidermis extends beyond the shell, covering the visceral mass. 



Java. 

 Dr. von Martens describes three varieties of coloration : 



Yar. PUNCTATA. Mantle brownish gray, head and neck blackish, 

 sides of the foot with small indistinct round spots, sole 

 lighter through the middle. 



Var. MARMORATA. Mantle light brown marbled with reddish 

 brown, sides of the foot more grayish with a darker fine 

 reticulation. 



Yar. VITTATA. Reddish gray-brown, with dark lines directed 



rearwards from the base of the tentacles two hook-like dark 



markings on the anterior part of the mantle, two dark lines 



towards the tail. 



This is possibly the same as the next species. P. punctatus, 



Hasselt, is a synonym. 



P. PROBLEMATICUS, Ferussac. PL 37, tigs. 49, 50. 



Only known through Ferussac's figures. No locality given. 

 It may be the young of the preceding species. 



P. BECCARII, Issel. PL 37, figs. 51, 52. 



Shell roundly oval, slightly convex, membraneous, pellucid, 

 shining yellowish green. 



Animal with unequal polygonal tubercles, grayish brown, with 



small maculations on the minutely granular mantle. 



Borneo. 



