854 



MR JAMES MURRAY ON ENCYSTMENT OF TARDIGRADA. 



(31) Richtbrs, F., " Arktische Tardigraden," Fauna Arctica, Bd. iii., 1904, pp. 495-508. 



(32) ,, "Die Eier der Tardigraden," Ber. Senckenbg. Natf. Ges. 1904, pp. 59-69. 



(33) Schrank, Fauna Boica, vol. iii. 1, pp. 178-179. 



(34) Schultze, C. A. S., " Macrobiotus hut'elandi," Oken's Isis, 1834, p. 710. 



(35) Spallanzani, Opusculi di Fisica, Opusc. iv., vol. ii., pp. 181-253, Modeim, 1776. 



EXPLANATION OF PLATES. 



Plate I. 



1. Macrobiotus dispar, Murray. Side view. 



2. „ ,, cyst in the old skin. 



3. ,, ,, oblique ventral view of cyst. 



4. „ ,, cyst, with outer case re- 



moved. 



5. „ ,, simplex animal squeezed out 



of cyst. 



6. Cyst of Echiniscus perarmatus, Murray. 



7. Macrobiotus ?iodosus, Murray. Simplex form. 



8. ,, „ further reduced state. 



9. M. dispar, diphascon-simplex form. 



10. M. ambiguus, Murray. Portion of surface of 



egg- 

 11a. M. dispar, portion of surface of egg. 

 lib. M. furcatus, Ehr. Portion of surface of 



Platk II. 



12. M. dispar, emerging from cyst. 

 13 ,, empty case, with its trap-door. 



14. „ simplex individual, showing rudi- 



mentary limbs. 

 15a. M. oberhduseri, Doy.? Cyst in skin. 

 15ft. ,, teeth and pharynx in cyst. 



15c. ,, one pair of claws. 



16a. M. echinogenitus, Richters. Wrinkled cyst. 



166. M. echinogen.itus, a pair of claws. 



17«. M. oberhduseri, Doy.? Wrinkled cyst. 



111). „ teeth and pharynx. 



17'-. ,, a pair of claws. 



18a. G/gcophagus domesticus, De Geer. Rudiment 



ary Hgpopus (after Michael). 

 186. The same. Posterior part of case, with its 



trap-door. (Compare 13.) 



