BRUES: A NEW SPECIES OF PERIPATUS. 385 



present form tliat it must represent, to some extent at least, in(li\ idiial 

 ^•ariat^on. While I cannot be sure that more of the examples show 

 no legs with five papillae, it is very evident that one of them differs 

 (luite conspicuously from the others in this respect. 



Integument. On each body-segment there are two body-folds which 

 are incomplete, terminating about halfway between the median line 

 and the base of the legs. The alternate body-folds differ slightly but 

 regularly in width. This difference is slight and might easily be o\er- 

 looked, but their papillae accentuate the variaticm since the larger 

 papillae of alternate folds vary considerably in size. Thus on the 

 ))roader folds the largest papillae are nearly twice as large as those on 

 the narrower folds although there is practically no difference in the 

 size of the small primary papillae on alternate folds. The largest 

 papillae ha\e an evenly rounded or slightly transversely oval base 

 and are about as high as broad, with their nipple-shaped apex short 

 and acute. The smaller primary papillae number most commonly 

 three between a pair of large ones; not infrequently howe^■er, espe- 

 cially on the narrower folds only two occur; very rarely there are four, 

 and occasionally five, in which case the middle one is nearly always 

 markedly enlarged and the arrangement approaches that where there 

 are two small ones between a pair of large ones. Aside from this very 

 sparse scattering of medium sized papillae there is no tendency for 

 any intergradation between large and small papillae. Accessory 

 papillae are almost entirely absent; most of the body-folds show none 

 at all, and an occasional fold one or two of very small size toward the 

 edge of the fold. 



Color. In life, according to Mr. Noble, the body is uniformly deep 

 brown in color with a distinct yellowish band forming a collar behind 

 the antennae. After nearly a year in alcohol, the band has lost its 

 original color and shows as a paler area, almost white and very con- 

 spicuous in one specimen, and less noticeable in the others; in one 

 especially, it is only slightly evident. It is quite broad, including 

 from 17 to 23 body folds. The alcoholic specimens have also de- 

 veloped (|uite conspicuous body-markings which show as a zig-zag 

 line extending along each side of the body halfway between the legs 

 and median line, the angulations extending laterally opposite each 

 leg and medially between the legs. Sometimes a distinct dark streak 

 extends downward toward each leg. Between the darker markings 

 and excepting the dark dermal papillae, the integument is greatly 

 bleached and is of a dirty yellowish lilac tinge both above and l)elow 

 and on the legs. 



