22,0 



ARACHNOIDEA. 



CASE 

 XIV. 



No. 2. 



Found in the cellular tissue of the Night Heron (Ardea 

 nycticorax), a bird very common in many coun- 

 tries of Europe, in Africa, and also in Asia and 

 Japan. 



Hypoderas lineatus. 



Copied from Giebel's 



figure. 



Hypoderas lineatus {NitzscJi). 

 ditto from Giebel's fiiiure. 



-2. Mamified sketch of 



Nitzsch found this species in inconceivable 

 numbers in an old night heron (Ardea nycticorax) 

 in various places, but especially in the fatty masses 

 which lie in the arm-pit on the outer margin of the 

 pectoral muscle. They were in abundance in 

 the cellular tissue, and there was no perceptible 

 opening communicating with the exterior. 



Hypoderas columb^, Cellularia sp. {Robertson^ 

 Journ. Micr. See. N. S. vi, 201). 



Mr. C. Robertson has described and figured 

 a species without name, but to which we have 

 provisionally given the name of Columbse, 

 after the animal in which it was found. It 

 is obviously a species of this genus, and as 

 Mr. Robertson points out it is very near 

 the species above-mentioned, described by 

 Montague under the name of Cellularia bas- 

 sani, from the Solan goose. By the rules 

 of priority Cellularia should therefore take 

 precedence of Frauenfeld's modern name 

 Hypoderas; but the former name has for 

 long been a]^propriated to a genus of 

 Polyps, and the present is a type of too 

 abnormal a nature to allow a double em- 

 ployment of the name to be admitted. 



Cellularia columb;e (under 

 side). Copied from 

 Robertson's figure. ' 



Ditto, on vein of pisfeon. 

 Nearly natural size. 



