160 J. MURRAY 



LIST OF SPECIES COLLECTED 



Hchiniscus gladiator, Murray. M. oberJtauseri, Doyere 



E. sylvanus, sp. n. M, intermedius, Plate. 



E. intermedius, Murray. M. articus, Murray? 



E. canadensis, sp. n. M. sattleri, Richters. 



E. oihonnce, Richters ? M. tuberculatus, Plate. 



E. bisetosus, Heinis? M. canadensis, sp. n. 



Milnesium tardigradum, Doy6re. M. virgatus, sp. n. 



Macrobiotus hufelandii, Schultze. Dipfiascon chilenense, Plate. 



M. echinoyenitus, Richters. D. alpinum, Murray. 



M. areolatus, sp. n. D. scoticnm, Murray. 



M. harmsworthi, Murray. D. canadense, sp. n. 

 M. occidentalis, sp. n. 



Eight species not identified (8 Echiniscus, 5 Macrobiotus). 



NOTES ON THE SPECIES 

 Genus Echiniscus, Schultze (43) 



The eight species collected all belong to that section of the genus in which 

 segments V. and VI. are completely fused into one plate. It is rare to find a 

 district possessing so many species without including one in which V. and VI. are 

 separate. E. nmtabilis is the commonest species in that section, but it is not yet 

 recorded from either North or South America. 



Echiniscus gladiator, Murray (12) (Plate XX. Fig. 51) 



Stanley Park, Vancouver, British Columbia. Professor Richters had previously 

 found it in moss from Vancouver (37). 



The British Columbian form differs from the type in that the plates are covered 

 by wide but very low bosses. The figure, in which these bosses are indicated by 

 black lines, inevitably exaggerates their prominence, but it shows their size in 

 relation to the plates. 



The paired plates of E. gladiator and its variety exarmatus differ from those of 

 all other known Echinisci in that they only touch in the middle line for a short 

 distance near the anterior border, and diverge behind, as shown in Fig. 51. This 

 character has not been indicated in previous figures. 



Echiniscus sylvanus, sp. n. (Plate XX. Fig. 49) 



Specific characters. Size moderate ; colour yellow ; plates nine, two pairs, two 

 median ; V. and VI. joined ; seta a thick, short ; no other dorsal or lateral processes, 

 other than those on the head ; dots of moderate size, and seeming to be perforations ; 

 each plate of the pairs divided in two by lines ; lumbar plate faceted and trefoliate ; 

 fringe on fourth legs ; inner claws barbed. 



Detailed description, Length 275 /*, exclusive of fourth legs. The palps at the 



