ON ARCTIC TARDIGRADA. 



681 



EXPLANATION OF PLATES. 



Plate 1. 



1. Echiniscus borealis, sp. n. 



2. Macrobiotus islandicus, Richters 1 egg. 



3. Macrobiotus islandicus, „ „ 



4. M., sp. 1 egg. 



5a. M. arclicus, sp. n., teeth and pharynx. 



5b. „ egg. 



5r. ,, some rods of the egg. 



5'/. ,, claws. 



5e. „ one pair claws, side view. 



5/. M. articus, smaller oval egg. 



6a. M. crenulatus, Richters, teeth and pharynx. 



6&. ,, side view of leg and claws. 



6c. ,, claws and wrinkled crescent. 



la. M. harrnsworthi, sp. n., egg. 



lb. ,, teeth and pharynx. 



7c. ,, claws and crenate crescent. 



Id. ,, side view of claws. 



Plate II. 



S«. Echiniscus spitsbergensis, Scourfield, var. spinu- 



loides, var. nov. 

 "61>. ,, ,, outer and inner claws. 



8c. ,, „ portion of surface marking. 



9a. Macrobiotus, with eggs attacked by parasite. 

 9b. „ pharynx. 



10. Dipliascon, sp., pharynx. 



11. D. angustatum, Murray, pharynx. 



12. D. spitsbergense, Richters ? pharynx. 

 13a. M. augusti, Murray, gullet and pharynx. 



136. 





„ claws. 





14a. 



M. 



echinogenitus, 



Richters, var. areolatus, 

 var. nov., egg. 



146. 





)> 



pharynx in egg. 



14c. 





>) 



furca of tooth. 



14d. 







claws. 



TRANS. ROY. SOC. EDIN., VOL. XLV. PART III. (NO. 25). 



97 



