Plate 13. 



Fig. 1. J'crstciilioiKislcr luihrdiicinjs ; ahiictiiml aspect of type, enlar.ueil, p. i;}l. 



2. Astropvvtcn cnmicti.^: abactiiuil view of tyiie. enlarged, p. 79. 



3. Astropcctrn liiioiiiciis : al)a('tinal view of tyiie. enlarged, p. 82. 



4. Astrdpcctcii jicdicclhnis : ahactinal view (if tyiie. enlarged, p. 87. 

 560 



