160 BRITISH OAK GALLS. 
Aberrant examples of galls of Crnips Kotuart, Hartig. 
PLATE XXXVI. 
SINGLE GALLS: 
1. A very large globular specimen, 27 mm. in diameter. 
2A typical normal globular specimen, 21 mm. in diameter, with three 
beneath it dwarfed by parasites. 
3. A cluster of five in various stages of development. 
4, 5, 6. Pyriform in shape. 
7, 8. Fully-grown but tenanted by parasites. Note distinct sharp style on 
each gall. 
9. Developing in a forked twig. 10. Developing in a recurved twig. 
11. A similar specimen. The twig continues as in No. 10. 
12, 18, 14. Distorted by same cause. Appearance as though pinched between 
finger and thumb. 
15. A normal specimen with rough brownish exterior. 
16. A normal specimen with smooth buff exterior. 
17. Completion of development entirely prevented by fungus. 
18, 19, 20. Completion of development partly prevented by fungus. 
21. Three galls on one twig greatly deformed. 
22. One gall splitting into three parts. 
CoaLEscent Forms: 
23 to 37. Twin growths, unequal in size. 
38, 39, 40. Each of these contain two larval cells. 
41, 42. Co-equal in size, attached to twig where joined to each other (42 isa 
very fine example). 
43, 44, Co-equal in size, one only attached to twig ; 31, 32, the same also. 
45, 46, 47. Each contain three larval cells. 
48, 49. Each contain four larval cells. 
31, 32, 43, 44, are interesting from the fact that only one gall is attached 
to the twig; such forms are not common. 
In the case of specimens without twigs, the point of attachment of the 
gall is immediately above the figures, except 45, 46, 47, where it is on the 
right-hand side, and 49 on the left-hand. 
