EXPLANATION OF THE PLATES. 



PLATE IV. 



1. Vitrina pellucida, vol. i. 459 



2. Eolida purpnrascens, - 470 



3. Patella vulgaris, 474 



4. Terebratula cranium, a, Inside of the larger 

 valve, b, Inside of the smaller valve. 49 tf 



5. Terebratula aurita. a, b, The two valves viewed 

 externally, c, d, The corresponding valves view- 

 ed internally, all the four figures a little magni- 

 fied. - - ib. 



6. A, B, C. Three species of the genus Nirmus, 

 found on the Anser erythropus, magnified, 586 



7- A species of Argas, found on Falco tinnunculus, 



magnified, 558 



PLATE V. 



1. Coryna squama ta. a Natural size, b magnified'. ~) /? , . 



2. glandulosa. a b j 6 



3. Sertularia gelatinosa. a b ib. 



4. Ephydatia canalium, nat. size. - 6 14 



5. Furocerca. - - 6 Iff 





CORRIGENDA, 



VOL. I. 



Page 53. line IS. from the top, after superior add to 



125. 8 for facility read faculty 



238 9 consistent inconsistent 



. 250 21. property propriety 



. 263. 18. been become 



402. 9. before evolution insert internal 



VOL. ir. 



Page 121. line 14./roi the top, for the read their 

 . 120. 25, fifth fiftieth 



201. 9. division denizen 



268. after line 13. add, 1. Body furnished with feet. 



579. 1. before Strepsiptera insert ORDER \it. 



