JOUK. Kov. Soc. Wkstekx Ax'Stkalia, \'ol. XI T, No. 1('. 141 
Contributions from the Deji.-irtinent of IMolo^y, rniversity of 
Western Australia. Xo. 7. 
Some New Species of Megascolex from South-Western Australia^ 
by Professor G. E. Nicholls, D.Sc.. F.L.S., and Ada A. Jackson^ 
B.Sc. 
{Bead July IJ, 192b. Puhlislied August 10, 1926.) 
lAitil tlie visit of Drs. Micliaelsen and Hartineyer to Western 
Australia in 1905 no attempt seems to have been imnli- to eollei-t 
eai'tlnvorms in this ])art of the Continent. The rejtort by Dr. 
ilichaelsen on this portion of the eolleetion made by the German 
South'West Australian F\])edition const itntes Part II (tf the first 
volume of “Die Pauna Sudwest-Austraiiens, 1909.” In this ]>aper 
is recorded the finding of no fewer than fifty-two species, referred 
to eighteen genera, am! of these, thirty-four (mdemic s]>ecies were 
previously undescribcd. These new sjiecies all belong to the family 
Megascolecidae and are noted as being of (piite small size. 
The stay made in Western Australia by tlie members of this 
Ex]r.'(lition was of very limited duration and the seaiadi covered but 
a comparatively small area of the State- it was highly ])vobable, 
therefore, that many more sjiecies lemained to be discovi'red. At 
the end of tlu‘ last thii versify session a Pield Instructional Class 
was held for a fortnight, in the rt'gion of the NornaUr|) lidet, aiul 
a large amount of material, much of it apitarently mw, was ob- 
tained. Two of the wonns here described were secured at this time, 
both of them being remarkable for their relatively large size. Others 
which were also obtained in this locality are now being investigated. 
It has already been pointeil out (Niclmlls, 1922) lh:i , as le- 
gards fluviatile foriiis, Michaelseii 's statement that tins' aie \ei\ 
rare does not prove to be ciuTect. Some, such as / ins'/bm, au 
everyAvhere, others, as Hero, Chactof/aster (several sirechs of eaOi), 
Aclosoma, etc., are (piite common, ami reprcsi'u.atives (w ode i fat'd 
lies, such as Tubificids and Fnicliytraoids, are comparatively almU' 
daut. 
