126 J. MURRAY 



M. sattieri, Eichters. M. virgatus, Murray. 



M. pupillifer, Murray. Diphascon chilcnense, Plate. 



M. rubens, Murray. D. scoticum, Murray. 



M. augusti, Murray. 



Seven species not identified (5 Echiniscus, 2 Macroliotus). 



NOTES ON THE SPECIES 



Genus Echiniscus, Schultze (43) 



A: SPECIES HAVING SEGMENTS V. AND VI. DISTINCT 



Echiniscus mutabilis, Murray (12) 



Common in all the localities visited, both in New South Wales and Queensland. 



It is desirable that a correction should be made in this place in regard to all 

 records which I have made heretofore of E. arctomys in various countries. All 

 these records must be taken as referring to E. mutabilis. The error arose from a 

 misunderstanding of E. arctomys, Ehr. That species was supposed by Richters to 

 have segments V. a,nd VI. separate, but V. was described as being a half-ring, not 

 a pair, and there were no spines on the inner claws. E. mutabilis has V. paired, 

 and there are small barbs, easily overlooked, on the inner claws. The differences 

 are slight, as the separation of the third pair (segment V.) of plates in E. mutabilis 

 is very obscure. If it is conceded that these differences are not of specific value, 

 then Richters' records of E. arctomys may also refer to E. mutabilis, Murray.* 



The true E. arctomys, Ehr. [" Mikrogeologie," 1854 (4)], is quite a different animal. 

 It has segments V. and VI. united (see p. 128). 



If it is sought to identify E. mutabilis with any of Ehrenberg's species it must be 

 with E. suillus. The figure of that species is only a profile, and therefore not very 

 satisfactory for identification. It is not clear if the last line crossing the trunk is 

 the separation of V. and VI. or only one slit of the ordinary trefoil. If it is supposed 

 that V. and VI. are separate, there remains another difference. Ehrenberg figures 

 on the near fourth leg one very large curved spine at the base of the claws. This 

 may represent the barb of the inner claws, though if so it is incorrectly drawn. In 

 any case it is different from anything in E. mutabilis. A skin of 150 M contained 

 three eggs of 50 M by 42 M. 



Echiniscus novcezeelandice, Richters (37) (Plate XV. Fig. 5) 



Near Sydney and at Katoomba, in the Blue Mountains, pretty frequent. 

 The figure on Plate XV. is drawn from an Australian example, in order to show 

 some peculiarities which are commoner in that country. These are the forking of 



* Prof, llichters informs me in a letter that all his records under the name E. arctomys should be 

 E. suilhis, Ehr. The relationship of E. 'Mutabilis to E. saillus requires further investigation. 



