5 4 
472, 475. Coquille singuliere precieuse, recherchee dans les collections, 
490. One valve of a singularly thick Area, resembling A. granosa. 
508, Not in Lamark’s cabinet. 
563. Cleidotheirus ? 
573. Distinguished from the other species of Tridacna by the long hollow 
spines on the ribs, and the peculiar truncation of the anterior side. 
586. This Hippopus greatly resembles a Tridacna squamosa deprived 
of its scales, having but five ribs, and five intermediate striae, its margin is 
semicircular and not triangular as in the other species, nor has it a strong pro- 
minence in the middle as in the H. maculata ; its form, in fact, is precisely 
that of a much worn T. squamosa, but at the same time possessing the true 
characters of the genus Hippopus. 
607 — 609. Three small indistinct species of Modiola. 
649. A species of Perna, resembling P. isognomon, but large, and having 
the lobe very small, as in the P. ephippium ; the hinge resembles the latter 
shell. 
650. Coquille extremement rare, recherchee, tres precieuse. Lam. Anim. 
S. V. vol VI. p. 144. 
656, 657. A species of Avicula of a green colour, with white articulated 
rays. 
710,711. The two shells bearing these numbers, are probably the 
same species, they greatly resemble the P. varius, but the ribs are flattened, 
there is one small rib in the interstices, and the striae on the surface are trans- 
verse instead of longitudinal. 
720. A greatly worn valve, with longitudinal striax, and seven ribs, spe- 
cies doubtful. 
731. Coquille tres-rare, tres-recherchee dans les collections. Lam. Anim. 
S. V. vol. VI. p. 190. 
768, 769. Two small undescribed species of Hyaloea, from the Nile. 
777, 778. Two Chitons, the first a large whitish species, with the lateral 
triangles tuberculated. the margin scaly variegated with green and white. 
The other is a vex-y beautiful species, the valves are minutely tuberculated, of 
a chesnut colour, variegated with white ; a large white keel in the centre of each, 
and the margin of the valves bright blue ; the margin is naked coriaceus 
yellow. 
SOI. Patella measuring nearly eight inches in length. 
839—855. Patellae, the species of which have not been ascertained. 
866, 867. Two species of Fissurella, the first very large, but obscured by 
parasites ; the second small and worn, species doubtful. 
879—8S1. Two species of Calyptraxa, one white inside, with long tu- 
bular spines ; the other, dark chesnut within, and having extremely small 
spines. 
