ERRATA. 
Page 31, fifth line from bottom, read 12-14 instead of 12-13. 
» 40, last line but one, read 6-9 instead of 6. 
», 95, insert on line with a., Zool. Dep. 81. 1. 21. 7. 
» 103, last line but one, read 10 instead of 50. 
» 105, last line, read 24 instead of 4. 
», 108, last line but three, read 70 instead of 7. 
5, 113, near middle of page, read 271 instead of 276. 
», 123, last line, read 325 instead of 3. 
» 131, middle, insert -219 after 218. 
», 142, last line, read 517 instead of 577. 
», 156, near bottom, read 94. 6. 16. 14 and 16 instead of 94. 6.16 and 14. 
» 188, near middle, insert—c. Zool. Dep. 98. 12. 1. 30. 
next line, read “d” instead of “c.” 
» 196, near top, read 3782 instead of 3712. 
