40 Dr. W. B. Benham on some Javan Perichetide. 
VIJ.— Some Javan Perichetide. By W. BLAXLAND 
Brennan, D.Sc. (Lond.), Hon. M.A. (Oxon.), Aldrichian 
Demonstrator in Comparative Anatomy, Oxford. 
[Plate III.] 
I HAVE to thank Dr. Arthur Willey for collecting some earth- 
worms during his brief stay at Java, on his way to the South 
Sea, whither he was travelling for the purpose of investi- 
gating the development of Nautelus. I wish at present to 
describe three species, which are nearly allied to one another 
and to others previously recorded from Java. 
Several of the Javan species possess a peculiar and 
characteristic spermatheca; in the majority of the family 
Perichetide the spermatheca consists of two parts—(a) a sac, 
and (6) a muscular diverticulum—having different structure 
and different functions (see Beddard, Michaelsen, and others). 
In these particular Javan worms the sac is thin-walled, of 
large size, and somewhat ovoid in shape; its duct is quite 
short, and receives a very long diverticulum—longer than the 
greater diameter of the sac—which is curved round one side 
ot the sae, or, it may be, spirally coiled ; this cylindrical tube 
carries at its free end a small saccule, which communicates 
with the tube by a very narrow neck. Spermathece with 
such a diverticulum thus constricted near its free end and 
terminally dilated oceur in P. capensis, Horst *, P. operculata, 
Rosa t, P. Lenkatei, Horst f, P. Gibode, Horst §, and, as far 
as 1 am aware, in no other species ||. In all these species 
there are two pairs of spermathece, opening between the 
segments 7/8, 8/9, and the anatomy of all is very closely 
similar ; indeed, it is not an easy matter to determine whether 
all are really different species. 
Now, amongst the worms sent to me by Dr. Willey I find 
two which present certain characters common to the above. 
I shail have occasion to reter to P. capensis during the 
description of the new species. This species was first 
* ‘Notes from the Leyden Museum,’ v. 1883, p. 195; and Zool. Ergeb- 
nisse einer Reise in Niederl. Ind. herausgeg. vy. Dr. Max Weber, ii. 1892 
. 62. 
+ “Die exotisch. Terricol.” &c., Ann. des k. k. naturhist. Hofmuseum 
1891, p. 398. ; z 
} ‘Notes from the Leyden Museum,’ xv. p. 321. 
§ Lhid. p. 326. 
|| P. inflata, Horst (loc. cit.), has a somewhat similar diverti 
which, however, is dilated below the constriction. 
appears to be identical with Horst’s species, 
sip L culum, 
Ude’s species P. parva 
