INDEX TO THE HISTORIA CONCHYLIORUM. 
24 
Tab. Fig. 
454. 13. Terebratula intermedia of Sowerby. 
— 14. In shape resembles the Terebratula ornithocephala of Sowerby, but is much more 
depressed longitudinally in the middle. 
455. 15. Terebratula carnea of Sowerby. 
456. l6. Terebratula digona of Sowerby. 
457- 16. b. Is the Terebratula minor, subrubra, sive vulgaris, coloris hepatici of Lhwyd, 
t. 11. f. 829. and the Terebratula hepatica of Mr. Miller’s MS. 
458. 17. An inside cast of a Terebratula. 
— 18. Terebratula lineata of Sowerby. 
459. 1,9- Terebratula semiglobosa of Sowerby. 
— 20. Is the Terebratula coarctata of Parkinson and Sowerby; and by his reference to 
the Encyclopedie Methodique, t. 245. f. 4. the Terebratula decussata of Lamarck 
appears to be the same species. 
460. 21. Inoceramus concentricus of Parkinson and Sowerby. 
461. 22. A variety of the Pecten jibrosus of Sowerby. 
462. 23. Is probably a Spirifer; and the figure has been quoted by Chemnitz, Gmelin, La¬ 
marck, and several other authors, for Anomia truncata, which it imperfectly re¬ 
sembles. 
463. 24. Is most probably an undescribed species of Spirifer. 
464. 25. Mr. Miller informs me, that this is the Productus sinuosus of his MS. and that the 
hinge is figured in Parkinson’s Organic Remains, t. 9. f. 9 ; he says, that “ in its 
“ early stage of growth it is straight at the hinge, and semicircular, with one 
“ valve slightly convex, and the other somewhat concave; and that both valves 
“ are ornamented with concentrical ridges and fine radiating strise: on getting 
“ old, the margin assumes an irregular form, and bends upwards, so as to give a 
“ sort of rim to both the valves.” It occurs in transition limestone. 
465. 25. b. Is the Tridacna pustulosa of Lamarck, and the Productus giganteus of 
Sowerby. 
466. 26. Pecten Lens of Sowerby; and the species in Jamesons edition of Cuviers Theory 
is called Chamites auritus. Lister has copied both this figure and t. 9. f. 51. 
of his Historia Animalium, from Plofis Natural History of Oxfordshire, t. 4. 
f. 11. 
467. 26. b. Is arranged as a variety of Tridacna pustulosa “testa transversim breviore” by 
Lamarck; but Mr. Miller considers it to be a separate species: and it is the Pro¬ 
ductus crassus of his MS. and the Anomites crassus of Martin. 
468. 27. Productus comoides of Sowerby. 
469. 27. b. Is the Pecten multiradiatus of Lamarck, and the Pecten equivalvis of Sowerby. 
470. 28. Is the Pecten asper of Lamarck ; and the Pecten asper of Sowerby is probably a 
variety of the same species. Parkinson, in his Organic Remains, vol. iii. p. 323, 
has quoted this figure for a shell which is found in the green sand of Wiltshire; 
and it is called Pecten echinatus by Conybeare and Phillips. 
471. 29. Is probably an undescribed shell ; and without some knowledge of the hinge, it is 
impossible to ascertain which genus it belongs to. 
472. 30. A similar shell is figured as a Terebratula in the Encyclopedie Methodique, t. 246. 
f. 3. and I atn unacquainted with the species. 
473. 31. Is the upper or flat valve of the Productus latissimus of Sowerby. 
474. 32. Avicula echinata of Smith and Sowerby. 
475. 33. Avicula costata of Smith and Sowerby. 
476. 34. Plagiostoma pectinoides of Sowerby. 
477. 34. b. Is the inside cast of a Perna; which, with the generical name of Crenatula, and 
without any specific distinction, is figured in Parkinson’s Organic Remains, vol. iii. 
t. 15. f. 5. 
478. 35. Ostrea edulina , variety b of Lamarck. 
479. 36. I am unacquainted with this shell, and can only loosely conjecture that it may be a 
variety of the Corbula gigantea of Sowerby. 
480. 37- Mr. Miller considers this to be the Ostrea Marshii of Sowerby; and says, that “as 
“ the shell gets older, the number of its undulations increase.” 
481. 38. Is the Anomia Gryphus of Linneus, the Gryphcea arcuata of Lamarck, and the 
Gryphcea incurva of Sowerby. This figure is exactly similar to Buonannis Ri- 
