92 



C. CHILTON. 



highest part of the plateau originate in large swamps that 

 are almost peat bogs. Characteristic of such swamps is a 

 large moss forming cushions a yard across, and the P/ire- 

 atoicus lives in this moss. Mr. Hedley says they were 

 quite abundant, three or four being found in each handful 

 of moss, sometimes among the stems, but more often among 

 the muddy roots. 



These specimens clearly belong to the species named 

 above, and on the whole agree well with the description 

 given by Sayce, although naturally the numbers of spines 

 found on the different parts of the body and appendages are 

 not always precisely the same as those given in his descrip- 

 tion, which was drawn up from a single male specimen. 

 The lower antenna (which was lost in Sayce's specimen) is 

 as long as the head and first four segments of the peraeon, 

 and agrees in general structure with that of P. australis, 



I have numerous female specimens, and am, therefore, 

 able to add the description of the female. Sayce's speci- 

 men was a male, but pos- 

 sibly not fully mature. The 

 male specimens have the 

 peraeon more slender than 

 in the female, and some- 

 what longer in proportion 

 to the pleon. Sayce stated 

 that in P. shephardi the 

 pleon is relatively longer 

 than in P. australis Chil- 

 ton; this appears to be 

 true to some extent for the 

 females, but in the males, 

 the proportions of those 

 specimens that I have 

 measured are almost the 



Fig. 13. Phreatoicus shephardi, first 



peraeopod (gnathopod) of male, same as in P. australis. 



