268 DISCOVERY REPORTS 



the two species of Microscolex, one is the well-known endemic, M. falclandiciis ; the 

 other is apparently referable to the less-known species M. aqiiarumdulcium. Two other 

 species of this genus have previously been recorded from the Falkland Islands, viz. 

 M. anderssoni, Mich., and M. bovei (Rosa); the former is possibly synonymous with 

 M. aquarumdidciiim (see p. 274) and is an endemic ; the latter has also been recorded 

 from a large number of localities around Cape Horn. Chilota dalei (Bedd.), the fifth 

 Falkland Islands endemic, did not occur in the present collections. 



From Hermite Island, Cape Horn, five well-known acanthodriline species occurred in 

 the present collection, all of them Patagonian, Chilean and Tierra del Fuegan endemics 

 of more or less restricted range. With the exception of the specimens of Microscolex 

 michaelseni, which appear to be referable to a new subspecies, there are no indications 

 that these species from Hermite Island are in any way different from specimens of the 

 corresponding species from the mainland or from adjacent islands. 



A list of the species recorded from the present collections is appended below. A 

 complete review of the earthworm fauna of the Neotropical Region as known up to the 

 year 1905 is given by Cognetti^ ; more recent contributions, when relevant, are discussed 

 under the descriptions of the several species recorded in this communication. 



LIST OF SPECIES 

 Family Megascolecidae 



Genus Microscolex, Rosa em. Mich. 



M. falclandicus (Bedd.), Falkland Islands. 

 M. aquarumdidciiim (Bedd.), Falkland Islands. 

 M. georgianus (Mich.). 



f . georgianus. South Georgia ; 



f. reductus, nov.. South Georgia. 

 M. michaelseni, Bedd. 



hermitensis, subsp.n., Hermite Island, Cape Horn. 



Genus Chilota, Mich. 



Ch. bicinctus (Bedd.), Hermite Island, Cape Horn. 

 Ch. patagonicus (Kinb.), Hermite Island, Cape Horn. 



Genus Yagansia, Mich. 



Y. gracilis (Bedd.), Hermite Island, Cape Horn. 

 Y. papillosus (Bedd.), Hermite Island, Cape Horn. 



Genus Dichogaster, Bedd. 



D. bolaui (Mich.), var., Annobon. 



■ Family Lumbricidae 

 Genus Eiseniella, Mich. 



E. tetraedra (Sav.). 



f. typica (Sav.), Tristan da Cunha. 



1 Cognetti de Martiis, L., Mem. R. Ace. Set. Torino (2), lx, 1905. 



