DESCRIPTIONS OF GENERA AND SPECIES 421 



It is not quite certain whether the species described by myself (30) under this 

 name is the same as that called P. sieboldi by HOKST. My specimen was only 

 112 mm. in length, and was built of only 74 segments; as size is so often an index 

 of specific distinctness, it is possible that this individual is really distinct. 



(46) Perichaeta philippina, KOSA. 



/ 



P. philippina, ROSA, Ann. k. Hofm. Wien, Bd. vi, 1891, p. 397. 



Definition. Length, 240 mm. ; breadth, 7 mm. ; number of segment*, 125. Cliiellum, XIV- 

 XVI. Male pores on line with seventh or eighth seta. Setae: on VIII, 44; on XII, 

 70. Dorsal pores commence XI/XII. Hearts in X-XIII. Spermatfiecae in VII-IX, 

 with a single diverticulum expanded at end. Sperm-reservoirs in X, XI ; sperm-sacs 

 large with a narrow, long extremity. Spermiducal glatuls with a straight duct furnished 

 with terminal sac. No egg-sacs. Hab. Zebu. 



This species is near to P. vaillanti; it differs, however, from that species in a 

 few small points ; P. vaillanti has no thickened septa, there are four pairs of 

 spermathecae and the male duct is bent into a horseshoe shape. Is P. dubia of HOEST 

 (17) synonymous ? 



(47) Perichaeta capensis, HORST. 



P. capensis, HORST, Zool. Ergebn. Ost-Indien, p. 62. 



P. operculata, ROSA, Ann. k. Hofm. Wien, Bd. vi, 1891, p. 398. 



Megascolex capensis, HORST, Notes Leyd. Mus., v, 1883, p. 195. 



Definition. Length, 70 mm. ; breadth, 5 mm. ; number of segments, 60. Clitellum, XIV 

 XVI. Male pores on large papillae, appearing as if partly covered by an operculum, 

 since the aperture is crescentic, separated by 8-10 setae. There are no papillae. Setae, 

 38-40 on segment VIII, 50 posteriorly. Dorsal pores commence on VIII/1X (XI/XII). 

 . Spermathecae in VIII, IX; diverticulum long and coiled like a ram's horn tapering 

 towards extremity. Spermiducal glands extend through segments XV-XXI, with short 

 duct. Hab. Java; Cape of Good Hope. 



This species is stated to be ' flesh-coloured, with brown clitellum.' The buccal 

 segment is not separated from the following. There are some of the septa which 

 are specially thickened, but ROSA does not exactly state which ; all those in front of 

 the eighth segment are thickened, but it is not said how many these amount to. 



In spite of the difference in habitat, HORST is of opinion that his Megascolex 

 capensin is the same species as ROSA'S P. operculata, and UDE (4) concurs. 



