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Its surface was there formed of gravel, cemented together by calcareous matter; and out of it I extracted the following recent shells, which are in a more perfect condition than those from the upper plain: Calyptraea radians. 2. Turritella cingulata. 3. Oliva Peruviana. 4. Murex labiosus, var. 5. Solen Dombeiana. 7. Pecten purpuratus. 8. Venus Chilensis. 9. Amphidesma rugulosum.
A little further on where there is less heath and cistus, tall yellow and blue Spanish irises stand up out of the grass, or there may be great heads of blue scilla peruviana or sheets of small iris of the brightest blue. Indeed, sheets of brilliant colour are everywhere most wonderful.
Venus costellata, Sowerby "Zoological Proceedings." Pecten purpuratus, Lam. Chama, probably echinulata, Brod. Calyptraea Byronensis, Gray. Fissurella affinis, Gray. Fissurella biradiata, Trembly. Purpura chocolatta, Duclos. Purpura Peruviana, Gray. Purpura labiata, Gray. Concholepas Peruviana. Nassa, related to reticulata. Triton rudis, Brod.
The shells embedded in the calcareous beds forming the surface of this fringe-like plain, at the height of from 200 to 250 feet above the sea, consist of: Venus opaca. 2. Mulinia Byronensis. 3. Pecten purpuratus. 4. Mesodesma donaciforme. 5. Turritella cingulata. 6. Monoceros costatum. 7. Concholepas Peruviana. 8. Calyptraea Byronensis.
Out of several Cirripedes, which are anomalous both in structure and development, Cryptophialus minutus must be mentioned here; Darwin found it in great quantities together in the shell of Concholepas peruviana on the Chonos Islands.
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