the l-jiirly Slii<jes of Vi\\[oAU\m:\ sfliiiici I. 187 



whole arraii;joinciit greatly resembles that figured hy Miiller 

 (up. clt. pi. vi. fi;j. 7, and p. 73). 



The part oE the dorsal surfaee heliind the eeph:die areas is 

 divided into two portions hy a transverse line of dark s|)ot.s, 

 which are sei-n luuU'r a hij^h j)o\ver to consist of small smooth 

 ari'as set like ishinds jiinou'; the dense rugic of the general 

 surfaee. The anterior of these portions bears a pair of 

 very eonspicuous eiji-Uke spots (fig. 1, e.s.), situated one on 

 either side, some distance behind the division between tlie 

 lateral and intermediate areas. Kach spcn consists of a dark 

 body, the ehitin immediately surrounding which is pale and 

 almost colonrh-ss. F. Miiller [ujk cit. p. ol, |)1. iv. fig. 10) 

 deserii)es and figures organs of like luiture in his larva, and 

 comments on their resemblanec to eyes. They must not 

 be confounded with the true visual organs described above. 

 Tlie writer is inclined to believe that these daik spots are the 

 (as yet fnnetionless) first [)air of spiracles ; Miiller describes 

 these {op. cit. \^\^. (57, 70) as situated on the dorsal side of 

 (he eephalothorax, but he does not appear to state whether 

 they are identical with tlie eye-like spots or not. Immedi- 

 ately behind the eye-like spots, and in front of the transverse 

 line, are two deep pits (PI. IX. fig. 1,;;.) projecting down- 

 wards into tlie interior of the body. The posterior part of 

 the eephalothorax (Ijchind the transverse line) bears two 

 conical spines, similar to those on the succeeding segments ; 

 and the liind margin bears a series of spines on either side 

 behind the lateral process. Ventrally., the cephalothoraeic 

 segment is ciliate towards the sides. 



Si'f/inents 2-."). — There is a series of conical spines, short 

 and sharp, along the front margins of the projecting lateral 

 portions of each segment ; and a less regular series along the 

 hind margins of these lateral portions. These anterior and, 

 posterior marginal series are continued across the dorsum 

 of the segment as two transverse series, each consisting of 

 al)OUt 4—0 spines, widely spaced out, and when viewed from 

 directly al)ove appi'aring as dark spots. There are also 

 scattered smaller spines on the projecting lateral parts of the 

 segment. Vvntrally, the surface is smooth, except for a 

 rugulose-spinulose area on either side at the base of the 

 lateral process (PI. IX. fig. 2). 



The lateral processes (both of these and of the sixth and 

 cephalothoraeic segments) are simple, pediform, bearin" 

 long fine cilia' dorsally exce[)t at the base. There are no 

 spines or setie e\cee<ling the ciliae in length, as in some 

 genera, but in balsam-mounts each lateral process is seen to 

 bear a series of several spines shorter than the ciliae and 

 concealed from ordinary view among these. \'cntrally the 



