﻿I860.] 



HUXLEY — MACEATTCHENIA BOLIVIENSIS. 



73 



EXPLANATION OF PLATES IV. & V. 

 Illustrating Mr. Salter's paper on some Palaeozoic Eossils from the Bolivian Andes. 



Plate IV. 



Eig. 1. Productus semireticulatus, Martin. Isthmus of Copacabana. 



2. P. Longispina, Sow. Isthmus of Copacabana. 



3. Orthis Andii, D' Orb. Santa Cruz. 



4. Athyris subtilita, Hall. Isthmus of Copacabana. 



5. Rhynchonella, sp. Santa Cruz. 



6. Bellerophon ; like Urn, Fleming. Isthmus of Copacabana. 



7. Orthis, sp. Oruro. 



8. Phacops latifrons, Bronn. Oruro. 



9. Ph. Pentlandii, Salter. Aygatchi. 



10. Favosites (?), sp. Oruro. 



11. Tentaculites suprenius, Salter. ~j 



12. T. Saienzii, Salter. _ | T]1 

 13 a. Tentaculites, sp., and Beyrichia Eorbesii, Jones. <" " 

 13 b & 13 c. Beyrichia Forbesii, Jones. 



It m SftET" s " lter - } ™* « Ma1 ^ 



17. Cucullella, sp. Illampu. 



18. Ctenodonta (Nucula), sp. Valley of Millepaya. 



19. Area (?) Brownii, Salter. Fig. 20. Young specimen. Illampu. 



Plate V. 



Eig. 1 & 2. Homalonotus Linares, Salter. 1 j-^ 



3. Homalonotus, sp. J 



4, 5, & 6. Cruziana Cucurbita, Salter, "i , 

 7 & 8. C. Unduavi, Salter. 



9. Boliviana Melocactus, Salter. L Valleys of Aceromarka and 



10. B. proboscidea, Salter. j Unduavi. 



11. B. bipennis, Salter. J 



3. 0)1 a New Species of Mackaechexia (M. Boliviensis). By 

 Thomas H. Huxley, F.R.S., Sec. G.S., Professor of Natural 

 History, Government School of Mines. 



[Plate VI.] 



The vertebrate remains obtained by David Forbes, Esq., F.R.S., 

 F.G.S., from the mines at Corocoro, under the circumstances de- 

 tailed in his paper " On the Geology of Bolivia and Southern Peru," 

 consist of the following parts of the skeleton of apparently one and 

 the same Mammal: — 1. A portion of the right maxilla and palate, 

 with fragments of grinding teeth. 2. Rather more than the right 

 half of the occipital portion of the skull. 3. A middle cervical ver- 

 tebra, nearly entire. 4. A fragment of a posterior lumbar vertebra. 

 5. A small portion of a right scapula. 6. A crushed fragment of the 

 proximal end of an ulna. 7. Part of the proximal end of the left 

 tibia. 8. The entire left astragalus, and part of the right astragalus. 



