TARDIGRADA: CANADA 171 



species is nearest to islandicus, from which it is distinguished by the ridge without 

 spines, by the different egg-spines, and by the dotted skin. 



In Australia and Hawaii there is a form, apparently belonging to this species, 

 agreeing with it in most characters, but not yet fully studied. The colour is a paler 

 yellow. The skin is dotted as in the type, but the specimens lacked the clear fluid 

 circulating between two layers of skin, and containing numerous hyaline plates. The 

 eggs were not seen in these countries. 



Macrobiotus intermedius, Plate (23) 



Habitat. Near the Lake of the Woods, Ontario. 



The egg had the typical top- shaped processes. It measured 50 ^ without the 

 processes, 58 n over them. The young squeezed out of the egg was 120 n in length, 

 and the round pharynx was 15 n in diameter. The processes of the egg were 

 separated by spaces greater than their own diameter, and the surface between them 

 was covered with regular pellucid dots. 



Macrobiotus oberhauseri, Doyere (2) 



Habitat. Vancouver, British Columbia. 



American examples were not papillose, as is so often the case in Africa. 



B : SPECIES HAVING THICK-SHELLED EGGS WITH EMBEDDED RODS 

 Macrobiotus arcticus, Murray ? (19) 



Habitat. Vancouver, Rocky Mountains, Lake of the Woods. 



No eggs were found in Canada, and without them there is some doubt about the 

 identification. The animal found in three of the localities visited agrees with 

 M. arcticus in having a narrow gullet, two short " bacilla " in the pharynx, and claws 

 of the Diphascon type. 



The only other species known which has similar eggs is H. hastatus, Murray (18), 

 v.'hich was not observed in Canada. 



C : SPECIES HAVING SMOOTH EGGS 

 Macrobiotus canadensis, sp. n. (Plate XXI. Figs. 6la-6ld) 



Specific characters. Small, hyaline ; gullet slender ; teeth abruptly enlarged 

 about the middle ; pharynx nearly round, with three short nuts, increasing in size 

 from first to third, comma very obscure or none ; claws widely divergent, but 

 approaching the Diphascon type ; one claw of each pair is longer and thinner than 

 the other, and that of one pair is very long and slender; eggs narrowly oblong, 

 smooth, laid in the skin at the moult. 



General description. Length 225 M. A pair of small dark ejes. The teeth are 



