472 ADDITIONAL NOTES ON PERIPATUS LEUCKARTI, 



apart, and the ground colour paler, in places sometimes colourless. 

 The pale-coloured papillfe are pale blue or more or less colourless, 

 wholly so, or all but an apical portion, or only a basal portion, 

 with usually just an apical pale spot ; when conspicuous they are 

 seen to be chiefly arranged in four longitudinal series on each side 

 of the median dorsal line ; though not so conspicuous as in the 

 forms in which there is relatively more orange, they are generally 

 recognisable, and their arrangement is as follows :— (1) on either 

 side of and rather close to the median dorsal line commencing on 

 the head a row the papillae of which are separated by intervals of 

 thi'ee transverse ridges ; usually in addition between the first row 

 and the median line an inner row of similar papillae commencing 

 some little way behind the first, the papillae of which also occur at 

 intervals of three ridges, and alternating with the former, a ridge 

 on which there arp chiefly secondary papillae intervening between 

 every two alternating papillae; if most of the papillae are uniformly 

 pale there is then a double or alternating row of. them, but some- 

 times the papillae in only one row, or in parts of the body are pale ; 

 (2) still further out on each side a similar double (or single) alter- 

 nating series ; one of these rows quite anteriorly bending in 

 towards the first-mentioned row ; the papillae of this, of the pre- 

 ceding, and of the next series, when present, on the same trans- 

 verse ridge ; (3) again still further out on each side a more 

 interrupted series consisting generally of two papillae, one behind 

 the other, over each leg; and (4) a series of irregular lozenge-shaped 

 groups (in outline) of about half a dozen or more papillae (one or 

 two papillae on each of about six consecutive ridges) just above the 

 intervals between the legs : some only of the papillae in some of 

 the lozenge-shaped groups show a tinge of orange or yellow, the 

 others being pale blue, while sometimes the papillae of a whole 

 group are dark blue ; orange may also be present in one or two 

 very small patches on the ground colour of the outer surface of a 

 few of the legs towards their base. These specimens therefore are 

 almost entirely blue, and though not one of them is absolutely 

 without at least a tinge of orange somewhere in one or other of 



