204 ME. r. E. BEDDAKD ON EAETHWOEMS [Jan. 14, 



" prostate " glands, although trilobed, are limited to the xyiiith 

 segment. 



The shape of this gland is frequently used as a specific character 

 in PericJiceta, and as a rule apparently with some reason. The 

 present species, however, shows that it is necessary to be discreet 

 in the use of the character. In nearly all the examples which I 

 dissected, the gland in question occupies three or four segments 

 and has an ear-like shape, the lower margin curving forwards and 

 upwards like the lobe of the ear. In one specimen, which I do 

 not feel able to distinguish specifically, the gland has a quad- 

 rangular form, occupies four segments, and is deeply incised in 

 correspondence therewith. 



From Hong Kong I have received specimens of a PericJiceta 

 which I do not like to separate specifically from the above, 

 although they show certain diiferences from it amongst themselves. 

 In one specimen, a long and slender worm, the spermathecae have 

 a long duct, and the spermiducal glands have the ear-like shape 

 characteristic of the species. The male apertures are prominent. 

 Other specimens, though smaller, are rather stouter worms than 

 the one just referred to ; the duct of the spermatheca is not very 

 long, and the spermiducal glands are much lobulated and not ear- 

 sha])ed. Nor is there here a marlced difference between the 

 Heptum immediatel)'^ preceding the gizzard and those just in front 

 of it : there is this difference in the first mentioned specimen 

 from Hong Kong. In botli the cceca are long and slender, occu- 

 pying two full segments. 



Appendix. 



I take the present opportunity of describing three new species 

 of PericJiceta, and two new AcantJiodrilids, which I have recently 

 received. 



PeiIioh^ta insulje, n. sp. 



Of this new species I have a single example — a slender worm 

 measuring 103 mm. 



It consists of 95 segments. 



The clitellum occupies the three usual segments, but is deficient 

 at both ends. The last segment of the clitellum has setje. 



The male pores are separated by a moderate distance. 



Oenital papillcB are present in two regions of the body. On 

 the xviiith segment are 8 largish papillce, each surrounded by a 

 series of circular ridges upon the skin. Two of these papillae form 

 on each side with the male pore of their side a triangle ; the 

 remaining four form a line across the segment above the line of 

 the setas. On segment xix., on the left side of the body, is a single 

 similar papilla. In addition to these papillsB developed in the 

 neighbourhood of the male pores, there are a pair near the anterior 

 margin of the viith segment like those of PericJiceta inclica. 



The first septum separates segments iv./v. This and the three 

 following are not very much thickened, but they are tied to each 



