■432 Dr. W. B. Benham on some 



area ; no copulatory papillae. Spermatbecae in seg- 

 ments viii. and ix. ; pores on anterior margins ; a 

 globular sac, witb narrow (undulating) diverticulum, 

 expanded terminally. Dorsal pore xii./xiii. Ch^tal 

 ring complete, 70 chsetse in front of and 100 behind 

 clitellum. Pair of caica in xxvii,, the base incised to 

 form about 12 secondary cseca. Spermiducal gland 

 small, triangular, confined to xviii. ; duct thick, short, 

 not curved; no muscular bulb. 



Ilab. Jampea Island, south of Celebes. 



Perichceta digitata^ sp. n. (PI. XX. fig. 2.) 



A single specimen serves for the foundation of this new 

 species. It is rather smaller than the preceding, measuring 

 240 X 15 millim. at its thickest part. 



It is rather pointed at each end, and especially at the tail, 

 where the last dozen segments taper to a point ; this difference 

 may, of course, be due to preservation. 



The general colour is lighter and of quite a different tone to 

 that of the preceding, being a stony grey, with very slight 

 greenish tint^ and passing posteriorly into a distinct French 

 grey. There is no banding, the chsetal rings being no 

 lighter than the rest j but the anterior part of the worm is 

 lighter, not darker, as is almost universally the case, being 

 much mottled with pinkish-white spots, irregular in arrange- 

 ment and size, but all small. This mottling, which is a very 

 unusual kind of marking in earthworms, diminishes behind 

 the clitellum, the spots getting fewer and smaller, and ulti- 

 mately ceasing. 



The pigment does not extend so far down the sides as in the 

 preceding worm, and the ventral surface of the anterior seg- 

 ments is light, this band being so wide as to take in the 

 male and spermathecal pores. The ventral surface is gene- 

 rally a very light brown. 



The clitellum is brown, but with an olive-green tint about 

 it, and only slightly darker than the rest of the body. 



The worm consists of 126 segments. 



The clitellum is on the usual segments, but apparently not 

 quite fully developed, as dorsal pores can be detected, and on 

 the ventral surface of the segments xiv., xv., xvi. is a row of 

 18 or 20 chsetse. Whether these would be permanent must 

 be left undecided. 



The first dorsal pore is between segments xii./xiii. 



The male pores, which are 6 millim. apart and are separated 



