Dr. W. B. Benham on some Javan Perichetide. 4] 
described by Horst in 1883 from an imperfectly preserved 
specimen ; he added new facts about it in 1892, but in neither 
case does he mention the colour of the worm, and it appears 
to be a very important point to note in the Perichetide, as 
Beddard has already pointed out. 
Later still, [ide (1893) *, as a result of his examination of 
numerous specimens, added the fact that the colour is lighter 
or darker brown. 
Horst and Ude regard Rosa’s P. operculata as being 
synonymous with this species; but the latter describes his 
worm as ‘ flesh-coloured;’’ and there are one or two anato- 
mical points which seem to me to differentiate the two forms. 
The first worm I wish to describe is so distinctively coloured 
that, although it agrees more or less closely with P. capensis, 
I believe it to be entitled to a new name. I call it after my 
friend Dr. A. Willey, to whom my thanks are due for his 
kindness in finding time to «collect and carefully preserve 
these worms. | 
Pericheta Willeyt, sp. n. (Pl. IIL. tigs. 1-6.) 
It is represented by a single mature and well-preserved speci- 
men, collected in the humus around an epiphyte, Asplenium 
nidus, occurring at the Gedeh volcano, near 'Ljibodas. 
The worm measures 140 millim. (53 inches) in length and 
6 millim. in diameter; it consists of ninety-two segments. 
It is thus a larger and fatter worm than the succeeding 
species. Its coloration in spirit is quite distinct from that of 
any Perichete of which I can find a description f, and recalls 
very strongly the common “ Brandling”’ (Allolobophora 
jfatida). 
The general ground-tint is yellow, the rings or ridges 
carrying the chete are white. ‘he dorsal surface of every 
segment is marked by two transverse bands of rich brownish 
red—one rather broader band behind the chetigerous ring, 
and a rather narrower band in front of the ring—so that the 
intersegmental furrows are yellow. These bands are broadest 
dorsally, but at each side, below the level of the lateral line, 
narrow rather suddenly ; at the same time the tint becomes 
lighter, and gradually disappears at about the level of the 
male pores. Anteriorly these dark bands become wider and 
send prolongations between the chete, so that on the first 
* Ude, “ Beit. z. K. ausland, Regenwiirmer,” Zeit. f. wiss. Zool. lvii. 
+ P. fasciata, Rosa, from Engano, appears to have a somewhat similar 
plan of colouring (Annal. del Mus. Civico d. Stor. Nat. d. Genova (ser. 2) 
xii. 1892, p. 543. 
