418 WILHELM MICHAKLSKN. 



The specimen from Scottsville represents the larger form, 

 which was formerly separated from the typical form as the 

 variety octonephra {Rosa), where in most of the segments 

 there are four micronephridia on each side, but the ventral- 

 most micronephridium is very small. In many segments of 

 the Scottsville specimen the innermost micronephridium is 

 altogether absent, and these segments are in the condition of 

 the typical form. The specimen may be regarded as inter- 

 mediate. 



Dichogaster crawi Eisen. PI. XXXII, figs. 6 and 7. 



Dichogaster crawi Eisen, "Researches in American Oligochseta, 

 with especial reference to those of the Pacific Coast and adjacent 

 Islands," Proc. Cal. Ac. (3) ii, p. 228, pi. x, figs. 82-94. 1900. 



Hab. — Scottsville, Pietermaritzburg, Natal ; W. G. Rump, 

 December, 1911. 



Chapel Street, Pietermaritzburg, Natal ; H. C. Burnup, 

 December, 1911. 



Also San Francisco, California, and Del Monte in conser- 

 vatories (teste Eisen). 



The specimens from San Francisco were said to have been 

 introduced from Honolulu, Hawaiij but I have shown else- 

 where ^ why I regard these statements of Mr. Craw as 

 being incorrect, and it is probable that the worms entered 

 the plant receptacles after their arrival at Mr. Craw's nursery. 

 In any case most of the species of this genus, including 

 D. crawi, have been widely transported hither and thither 

 by man into numerous localities. 



Remarks. — The specimens from Natal show in general such 

 a striking conformity with Eisen's Dichogaster crawi that 

 there is no doubt about the identity of the species ; but at the 

 same time there is an apparently very important difference in 

 a certain structural character. If Eisen's statement is correcr, 

 it must be assumed that there is great variability in the 

 character in question. According to Eisen the spermathecEe 

 ' Michaelsen, W., "Die geographische Verbreitung der Oligochaten," 

 Berlin. 1903. 



