INDEX TO THE HISTORIA CONCHYLIORUM. 
31 
Tab. Fig. 
6 17- 3. Trochus Niloticus. 
618. 4. Is probably a variety of Trochus melanostomus : but in Favanne, vol. ii. p. 17 , it is 
said to be “le Saphir vert;” with which shell I am unacquainted, and which is 
said to be very rarely met with. Klein’s t. 2. f. 35. is a copy. 
619 . 5. Is the Trochus tigrinus of Hebenstreit; which differs entirely from the Trochus ti- 
grinus of Chemnitz: and this shell in the Descriptive Catalogue has been ar¬ 
ranged erroneously as a variety of Trochus Niloticus. 
620 . 6 . Is the Trochus marmoratus of Lamarck, and the Trochus Niloticus , variety B, of 
the Descriptive Catalogue. 
b 21 . 7- Unaccompanied by any description, it is difficult to ascertain the species to which 
this figure belongs: but it has been quoted by Favanne, vol. ii. p. f° r a variety 
of “l’Etourneauand at p. 129 . this variety is described with the name of “le 
“ petit Papier marbre.” 
— 8. Trochus minutus. 
622 . 9 . Trochus Solaris, variety B ; and these figures are reversed copies from Buonanni, 
Ricreatione, part 3. f. 366. and 367 . 
6 23. 9 . a. Is probably an imperfect shell of the abovementioned variety of Trochus So¬ 
laris. 
624 . 10 . Trochus Telescopium ; and this figure has been taken from Buonanni’s Ricreatione, 
625. 
626 . 
627 . 
11 
11 
13 
628. 14. 
629 . 15. 
630. 
631. 
632. 
633. 
634. 
16. 
17 - 
18. 
19. 
20 , 
21 . 
22 . 
635. 
636. 
637 . 
638. 
639 . 
23. 
24. 
25. 
26. 
27. 
28, 
640. 29 . 
641. 
642. 
30, 
31, 
32, 
33, 
34, 
part 3. fig. 92 . 
Trochus Mauritianus. 
a. Trochus dentatus. 
Is “la Rotule” of Favanne; and has been generally considered to be a variety 
of Trochus concavus, but is probably a distinct species. Klein’s t. 1 . f. 20 . is a 
copy. 
Trochus imbricatus. In the Portland Catalogue, this species is called Trochus 
Tectum; and the specimen there advertised with a reference to this figure, is said 
to be the only perfect one ever known. 
Favanne, vol. ii. p. 305, under the name of “ le Raboteux,” has quoted this figure 
as a variety of “ le Concombre,” which is Trochus imbricatus. 
Trochusfenestratus. 
Trochus virgatus. 
Trochus Conus. 
Is an uncertain figure; and has been quoted, with a mark of doubt, by Da Costa 
for Trochus papillosus. 
Trochus maculatus. 
Trochus cinereus. 
Answers to Chemnitz’ figures 1695 . and 1696 ; and is the “ Cadran de Coromandel” 
of Favanne, vol. ii. p. 425. and the Solarium granulatum of Lamarck. Lamarck 
says, it may be known from Trochus perspectivus “par ses granulations, meme 
“ en sa face inferieure, son defaut de stries longitudinales, et son ombilic resserre, 
“ ceint de dents epaisses.” 
Trochus stramineus. 
Trochus perspectivus; and the engraving appears to have been made by copying 
fig. 27 . and 28. of Buonanni’s Ricreatione, so as to invert the figures. 
Trochus Pharaonis, variety B. 
Trochus Pharaonis, variety A. 
Trochus variegatus. 
Quoted by Favanne for a Trochus from the Philippine islands, which he calls “la 
“ Perdrix rouge.” 
Is an uncertain figure, and has been quoted by Montagu, with a mark of doubt, for 
his Trochus umbilicatus ; but Favanne (vol. ii. p. 123.) considers it to be “ le 
“ Bouton de la Nouvelle Zelande,” which is a very different shell. 
Turbo Pica; and Klein’s t. 2 . f. 52. is a copy. 
Trochus cinerarius. 
Trochus Magus. 
j- Trochus turbinatus; and Klein’s t. 2 . f. 53. and 54. are copies. 
643. 35. A worn shell of Trochus crassus. 
