414 OLIGOCHAETA 



Hearts in X-XIII. No egg-sacs (?). Spermathecae in, VI-IX; each has a diverliculum 

 longer than pouch ; to these are appended a variable number of small globular sacs ; 

 near to orifices of spermatliecae on segments VII-IX (in front of line of setae) are 

 a pair of papillae which correspond to whitish glands seen inside the Itody. Septa 

 separating X/XV thickened. Sperm-sacs in XI, XII. Spermiducal glands consist merely 

 of the muscular duct. Hob. Japan. 



The main peculiarity of this species is in the form of the spermathecae, which is 

 only paralleled in the case of P. martensi. 



(27) Perichaeta masatakae, BEDDAKD. 

 P. masatakae, BEDDABD, loc. cit., p. 761. 



Definition. Length, 125 mm.; breadth, 6 mm.; number of segments, 90. Clitellum, XIV- 

 XVI, without setae. Intestine begins in XV. Septa XXV are thickened. Spermathecae 

 in VIII, IX small with a diverticulum longer than pouch. On VIII, IX are paired 

 papillae, to each papilla corresponds a pair of white glands. Egg-sacs in XIII. 

 Spermiducal glands represented by muscular duct alone. Sperm-sacs in XI, XII. 

 Hob. Japan. 

 This species, like P. divergens and the majority of the Japanese Perichaetidae, 



has no glandular appendix to the atria. The number of spermathecae distinguishes 



this species from P. divergens. 



(28) Perichaeta ijimae, ROSA. 

 P. Ijimao, ROSA, Ann. k. Hofm. Wien, Bd. vi, 1891, p. 402. 



Definition. Length, no mm. ; breadth, 7 mm. ; number of segments, 112. Clitellum, XIV- 

 XVI, without setae. Male pores on large broad papillae. Setae 60 on segments VI- 

 VIII. Dorsal pores commence XVI/XVII. Intestine begins in XV, with long caeca 

 extending through five segments, arising in XXV. Septa IV/VIII, XIII/XIV thickened. 

 Spermathecae in VI- VIII opening in line with seta 9 ; no diverticulum. No egg-sacs. 

 Sperm-sacs in XI, XII ; sperm-reservoirs unusually large in X, XI. Spermiducal glands 

 extend through XV-XX, with short straight duct. Hob. Japan. 

 This species is chiefly remarkable for the absence of diverticula to the spermathecae. 



(29) Perichaeta minima, HOKST. 

 P. minima, Houar, Zool. Ergebn. Ost-Indien, Bd. ii, p. 66. 

 Definition. Length, 25 mm. ; number of segments, 80. Clitellum, XIV-XVI (?) ; on XVI 



