NEW SPECIES OF PEEICHiETA. 221 



incised, so as to be divided up into a number of variously sized 

 lobules. The muscular penial duct (cf) is S'^baped and opens 

 into a muscular sac or bulb (h). 



P. Madeline, n. sp. 



Alternate bands of purplish chocolate and white. Measures 

 135 X 6 mm. ; 110 segments. Male pores separated by 16 chsetse ; 

 no (?) copulatory papillae. Four pairs of spermathecse in vi. to 

 IX., opening at the anterior margin. A pyriform sac, with small 

 diverticulum. Dorsal pore xii./xiii. Chsetal ring with dorsal 

 gap ; 56 chgetae in front of, 60 behind clitellum. Spermiducal 

 gland rectangular, occupying three segments ; much and deeply 

 incised: penial duct S-shaped, opening into round muscular 

 bulb. 



Sah. Mt. Kina Balu, North Borneo. 



Affinities. — Two worms from Kina Balu, viz. P. Everetti and 

 P. Mnahaluensis, are naturally recalled to mind as being, one or 

 the other, possibly identical with the present worm ; but in both 

 there are several small spermathecse in each of the segments vi., 

 VII. — much as in the genera Kynotus and MicrocTiceta. Further, 

 the normal intestinal caecum is absent in both ; and there are thus 

 fundamental differences. The absence of copulatory papillae in 

 P. MadelincB must not be taken into account in referring to 

 other worms, for it is not mature, and possibly they may develop 

 late. Only one of Beddard's Bornean species has four pairs of 

 spermathecse, viz. P. padasensis ; but in many particulars the 

 two worms differ. I have been unable to find any species 

 which is very near to the present one in the totality of its 

 characters. 



Remarks on MicJiaelsen'' s Criticism of the value of certain 

 Specific Characters of tha Genus Perichseta. 



In a short paper dealing with nevf species of Perichceta from 

 Java * I insisted on the necessity for the careful description of 

 certain characters which all lumbricologists recognize as of value 

 in the discrimination of species of this genus, and on the need of 

 careful figures in illustration of these specific characters. In a 

 recent contribution Dr. Michaelsen t discusses my remariis, and 



* Ann. & Mag. Nat. Hist. xvi. 1895, p. 40. 



t "Oligochseten aus Kukenthal. Ergebu. zool. Forschungsreise in d. Molukken 

 und in Borneo," Abhandl. Senckenb. Gesell. xxiii. Hft. 2, 1896. 



