TARDIGRADA: CANADA 175 



E : UNIDENTIFIED EGGS. 

 Macrobiotics, sp. ? (Plate XXL Fig. 57) 



A large egg, measuring 105 n over the processes, which are low cones, rounded 

 at the ends, and papillose all over. The processes stand close together, without any 

 interspaces. 



This closely resembles an egg figured by Eichters in the " Moosrasen des 

 Gaussbergs " (35), Plate XX. Fig. 7, as probably related to M. echinogenitus. It is 

 probably a distinct species. 



Macrobiotus, sp. ? (Plate XXI. Fig. 56) 



A large egg, measuring 100 M over the processes, 80 M without the processes. 

 These are narrow conical pegs, rounded at the ends. They are separated by spaces 

 about equal to the diameter of the pegs at the base. 



A similar egg is figured in " Tardigrada of the South Orkneys " (15), Plate IV. 

 Fig. 14, as perhaps a form of M. echinogenitus. Another somewhat like it is figured 

 in "Arctic Tardigrada" (19) Plate XLV. Fig. 2, as perhaps M. islandicus, Richters. 

 The processes are not rounded, but many are a little expanded at the tip, showing an 

 approach to hufelandii. 



The Canadian egg is probably a distinct species. 



Macrobiotus, sp. ? (Plate XXL Fig. 59) 



A small egg, 80 M over the spines, 68 / without them. The processes are small 

 cones, slightly acuminate, acute. They are separated by spaces rather less than the 

 diameter of the processes at the base. The surface exposed between the processes is 

 marked by regular pellucid dots. 



Several species have eggs like this, and they cannot be distinguished with any 

 certainty unless they are found containing young. 



M. dispar has such an egg, but rather larger ; that of M. pullari is somewhat 

 smaller. The egg of M. ascensionis is considerably smaller, and has the processes 

 more closely set. 



Genus Diphascon, Plate (23) 

 Diphascon chilenense, Plate (23) 

 Habitat. Rocky Mountains. 



Diphascon alpinum, Murray (14) 

 Habitat. Rocky Mountains : near the Lake of the Woods, Ontario. 



