DK. P. P. C. H0EK ON DTCHELASPTS PELLVCIDA. 



155 



pointed out as existing between Darwin's specimens and those 

 from Mergui, are due to difference in age. A specimen I dissected 

 was furnished with ovigerous lamellae. 



In figure 3 I have given a representation of the penis of this 

 species. Whereas the proboseiformed organ, except in certain 

 species of Scalpellum, is very long, the present species has a 

 very thick and short penis, its tip being pointed and somewhat 

 hooked. Darwin does not describe the penis of this nor of any 

 other species of the genus. 



DESCEIPTIOX OF PLATE X3II. 



Fig. 1. Dichelaspis pellucida, Darwin, side view : x 14 diam. 



2. View of a part of the capitulum, to show A & B, the terga, C & D, the 



occludent segments of the scuta, and a, b, c, the angle the occludent 

 segment of the scutum forms with the handle of the battle-axe-shaped 

 tergum: X 30 diam. 



3. Kepresentation of the penis: x30 diam. 



