m sesk 
INDEX TO THE HISTORIA CONCHYLIORUM. 
13 
Tab. Fig. 
136. 40. 
137- 41. 
138. 42. 
— 43. 
139. 44. 
— 45. 
140. 46. 
— 47 . 
141. 38. 
— 39 - 
142. 36. 
143. 37. 
Helix Cornu Arietis. 
Helix cornea. 
Helix complanata. 
Helix Vortex. 
Constitutes the Helix No. 269. of Schroeters Einleitung; and, with this exception, 
appears to me to be an undescribed species. Petivcr, in his Gazophylacium, t. 
106. f. 19. lias copied tliis figure. 
Helix alba : and Petivers t. 106. f. 20. is a copy. 
Planorbis trivolvis of Say; and the Planorbis eburneus of Chemnitz, vol. ix. part 2. 
p.97. t. 127. f. 1123. if not the same, is nearly allied to this species. In the De¬ 
scriptive Catalogue I have erred, by following Mulier and Gmclin in quoting 
Listers figure for Helix albella : and Petivers t. I06. f. 17. is a copy. 
Schroeter has arranged them separately; but some specimens in my cabinet leave 
me no doubt that it belongs to the sanie species as fig. 46 . 
Neritafluviatilis; and is taken from the Historia Animalium Anglire, t. 2. f. 20. 
Patella lacustris ; and the figure is taken from the Historia Animalium Anglim, 
t. 2. f. 32. 
A young shell of Helix mammillaris. 
Nerita pulligera. 
146. 1, 
147 . 2 . 
148. — 
149 . 4. 
150. 5. 
151. 6. 
152. 7. 
153. 8. 
154. 9. 
155. 10. 
15 6. 11. 
157. 12. 
158. 13. 
159. 14. 
— 15. 
160. 16. 
FRESHWATER BIVALVES. 
Mya Batava. 
Mya ovata: and both this and the following figure have been copied from the Ap¬ 
pendix to the Historia Animalium Anglioe, t. 1. f. 4. and 6. 
Has been generally quoted for Mya Pictorum ; but Lamarck suspects that it be¬ 
longs to another species, which he has named Unio angusta. 
A distorted shell of Mya ovata. 
Mya margaritifera: and it has been copied from the Appendix to the Historia 
Animalium Anglise, 1.1. f. 1. 
Is Mya complanata ; and the Unio crassidens of Lamarck, and the Unio crassus of 
Say, may be added to the synonyms of this species. 
Is the Unio nasutus of Say: and Petiver, in the Gazophylacium, t. 105. f. 2. has 
copied this figure. 
Mr. Say has quoted this figure for his Unio cariosus ; but some American speci¬ 
mens in my cabinet tend to confirm Lamarck’s opinion, that it belongs to his 
Unio ochraceus, and that the latter is Mya radiata. 
Mytilus anatinus ; and it is an exact copy from the Appendix to the Historia Ani¬ 
malium Angliae, t. 1. f. 2. 
Mytilus fucatus. 
Mulier has quoted this figure for his Mytilus radiatus, which is probably only a 
variety of Mytilus Cygneus ; and it has been quoted, with a mark of doubt, 
though with greater probability, by Lamarck, for his Unio purpurata: but as 
Lister has not either figured or described the inside, it is almost impossible, with 
any certainty, to ascertain the species. 
Mytilus Cygneus: and the figure is taken from the Appendix to the Historia Ani¬ 
malium Angliae, t. 1. f. 3. 
Mytilus fluviatilis : and the name was first given by Gmelin to a description of 
this figure. 
Venus paradoxa, with the epidermis. The Venus subviridis of Gmelin has been 
wholly constituted from this figure; and the Galathea radiata of Lamarck, and 
the Donax variegata of Perry, may also be added to the synonyms of this scarce 
and beautiful species. 
Tellina cornea. 
Tellina pusilla. The Tellina Virginica of Gmelin has been constituted from this 
figure; and it has been copied by Petiver in his Gazophylacium, t. 104. f. 5. 
The Tellina alata of Gmelin has been constituted from this figure; and it is a va¬ 
riety of Mya sermafophora, which is the Hi/ria avicularis of Lamarck. Klein’s 
t. 9. f. 36. is a copy. 
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