100 WILLIAM BLAXLAND BENHAM. 



of Kinberg's type specimens. He comes to the conclusion 

 that the only good genera are Tritogenia, which has 

 eight setae in each somite, and not six, as Kinberg stated ; 

 Geogenia, with the clitellum occupying somites xiii toxviii, 

 and carrying modified setae ; and Eurydame, which has four 

 setse, and not eight, in a somite. These have a quincuncial 

 arrangement in the posterior region of the body, and are bifur- 

 cated, as in Urochaeta (E. P.). In other respects Kinberg's 

 descriptions are correct. The remainder of Kinberg's worms 

 belong to other genera. Mandane and Hegesipyle are 

 species of Perrier's Acanthodrilus. Alyattes is a species 

 ofLumbricus. Hypogaeon remains indeterminate; whilst 

 the remainder, as mentioned in my previous paper, Perrier 

 considers to be species of Perichaeta, Schm. ( =Megascolex, 

 Templeton). 



Recent Additions to Earthworm Literature. 



Since my previous paper^ was published, several additions 

 have been made to the literature of Earthworms, some treating 

 of the histology of known species and others being descrip- 

 tions of new forms. 



Professor F. Vejdovsky's beautiful work on the Oligochaeta 

 (' Systeme und Morphologic der Oligochaeten') contains a com- 

 paratively slight reference to terricolous forms, so far as new 

 anatomical details are concerned. Amongst these are drawings 

 of the structure of the clitellum, details as to the development 

 of the setae, structure of body wall, the spermatophors, &c., in 

 Dendrobaena, Allolobophora, Allurus, Lumbricus, 

 as well as some reference to and drawings of Criodrilus 

 lacuum, HofFmeister. 



In regard to the classification of the group, he puts aside 

 Perrier's arrangement, founded on the relation between the 

 sperm pore and the clitellum, and divides the whole of the Oli- 

 gochaeta into seventeen families (p. 63). Many reasons can 

 be adduced for this plan in preference to the more hard-and- 



1 This Journal, 1886, pp. 213—292. 



