7o Field Naturalists' Club — Proceedings. [ 



Vict. Nat. 

 Vol. XXIX. 



By Mr. P. R. H. St. John. — Herbarium specimens of 

 Eucalyptus viminalis, Lab., var. plurifiora, Bentham, collected 

 by Mr. J. G. O'Donoghue from a tree growing on bank of 

 Moorabool River, near Geelong, June, iqi2 (not previously 

 recorded for Victoria) ; and Eucalyptus leucoxylon, F. v. M., 

 var. pauperita, J. G. Brown, collected and donated to ex- 

 hibitor by Mr. Walter Gill, Conservator of Forests, South 

 Australia. 



After the usual conversazione the meeting terminated. 



NOTES ON THE ISOPOD, PHREATOICOPSIS TER- 



RICOLA, Spencer and Hall. 



By Janet W. Raff, M.Sc, Government Research Bursar in 



the Biological Laboratory, Melbourne University. 

 {Read before the Field Naturalists' Club of Victoria, 12th August, 1912.) 

 In i8q6 Professor Spencer and Dr. Hall * described a new 

 genus of terrestrial Isopoda, on specimens from the Gellibrand 

 River, about 20 miles south of Colac, Victoria. This new genus 

 Phreatoicopsis is closely related to Phreatoicus, Chilton, and it 

 contains the single species Phreatoicopsis terricola, Spencer and 

 Hall. Up to the time of the description of this new species 

 male specimens only had been obtained, so the points of 

 difference between them and the females could not be noted. 

 Since then specimens sent to the University by the late Mr. 

 H. P. C. Ashworth from the Otway Forest, by Mr. A. E. 

 Kitson, F.G.S., from Mount Wilham (near Ararat), and by Mr. 

 W. H. Ferguson from the Grampians, prove, on careful ex- 

 amination, to be the same species, and include five females. 

 I have, therefore, at the suggestion of Dr. Hall — for whose 

 help I am grateful — made note of the following i)oints of 

 difference : — 



Brood Plates. — ^There are four pairs of brood plates situated 

 on the ventral surface of the pereion, at the bases of the first 

 four pairs of pereiopods. They are flat and roughly oval, and 

 are directed slightly downwards and towards the middle line. 

 The first pair differs from the others in that it is a double 

 structure, each one consisting of two leaf-like lobes. The 

 anterior lobe is the smaller, and partly overlaps the posterior, 

 which is attached all along its upper margin to the under 

 surface of the anterior lobe. 



The second, third, and fourth pairs are equal in size, and 

 measure about 3 mm. in length. Each plate is bordered by 

 a narrow, transparent membrane along its free edge. Their 

 upper and outer ends are broadly attached to the ridges at 

 the bases of the limbs. These ridges are the elevated edges 



* Proc. Roy. Soc. Vic. voL ix., N. S., 1896. p. 12. 



