186 MEGASCOLEX TEMPLETON. 



fiud ouly mentioned insignificant external characters , so 

 it is often impossible to recognize the species of different 

 authors. As uncertain species must be considered : P. leuco- 

 cycla Schm., — viridis Schm , — cingulata Schm., hra- 

 chycyda Schm., (from Ceylon) ^) — corticis Kinb. (Oahu) ^), 

 diffringens Baird (England) ^), — bicincta Perr., — luzo- 

 nica Perr., — coerulea Perr., — hiserialis Perr. (Philip- 

 pine Isl.), — Juliani Perr. (Saigon) *), — rodericensis Gr. 

 (Rodriguez) ^), — suhquadrangula Gr. (Viti Levu) ®), — 

 toitensis Gr. (Tahiti) '^). Only the following 6 species, 

 are well characterized: P. HouUeti Perr. (Calcutta), — 

 posthuma Vaill. {a§inis Perr.) ^), from Java, Cochinchina 

 and Philippine-Islands , — rohusta Perr. (Mauritius and Ma- 

 nilla), — aspergillum Perr. (hab, ign.), — quadragenaria 

 Perr. (East-India), — elongata Perr. (? Peru) ^). 



Megascolex indicus n. s. '"). 

 Cephalic lobe extending over two thirds of the length 



1) loc. cit. 



2) Annul, nova, Öfvers. Svenska Vetensk Akad. Forh. 1866, p. 97. 



3) loc. cit. 



4) Only known by a preliminary description. Compt. rend. loc. cit. 



5) Phil. Trans. R. S. Vol. 168. 



6) Annel. Ausb. S. ]V1. S. Gazelle Monatsber. Berl. Acad. 1877. 



7) Reise Oesterr. Freg. Novara, Anneliden. 



8) Without doubt these two species must be considered to be identical; they 

 would be distinguished by the different situation of the copulatory pouches, 

 Vaillant stating that the orifices of those organs are situated in P. posthuma 

 between the 3th and 4th , 4th and 5th , 5th and 6th , 6th and 7th seg- 

 ment, whereas in P. affinis they would be placed between the 5th and 6th, 

 6th and 7th , 7th and 8 th , 8th and 9th segment. When we compare 

 however other numbers given by Vaillant, it seems that he has been mistaken 

 and has overlooked two segments; for according to his statement the testes 

 would be situated in the 9th and 10th ring, while in all known species of 

 Megascolex they are to be found in the I Ith and 12th segment. That those spe- 

 cies have not been found in the same country, but P. posthuma is a native 

 from Java and P. affinis from Cochinchina can make no difficulty, since Per- 

 rier has found Earthworms from Cochinchina and the Philippine-Islands in the 

 soil of Nice. 



9) Nouv. Archiv. loc. cit. 



10) The Perichaeta-specimen described in my paper «Niederl. Arch. f. 



JSotes from the Leyden IMuseuxn, Vol. "V. 



