GEOCHEMISTRY: CLARKE AND WHEELER 
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phate also. Many of them, moreover, are rich in organic matter. To 
these statements there is one known exception. The blue coral, Helio- 
pora cerulea, is an isolated organism, closely resembHng the true corals, 
and like them in its chemical composition. 
In the course of our research upon the inorganic, constitutents of 
marine invertebrates, 22 analyses of alcyonarians have been made, 
representing the following species : 
1. Eeliopora cerulea, Pallas. Blue coral. Southern Philippines. 
2. Tuhipora purpurea, Lamarck. Singapore, Straits Settlements. Latitude 
1° 20' N. 
3. Cor allium elatior, Ridley. A red coral. Murotsu,Tosa, Japan. Latitude 
about 33° N. 
4. Primnoa reseda, Verrill. East of Nova Scotia. Latitude 44° 16' N. 
5. Lepidisis carophyllia, Verrill. Off Nantucket shoals. Latitude 38° 53' N. 
Depth of water 3,168 metres. Temperature 3°. 3'. C. 
6. Pennatula aculeata, Dana. St. Peter's Bank. Latitude 44° 47' N. Tem- 
perature 4°.5 C. 
7. Paramuricea borealis, Verrill. Southwest edge of the Grand Bank. 
8. Paragorgia arborea, Milne-Edwards and Haime. Le Have Ridge, off 
Nova Scotia. 
9. Alcyonium carneum, L. Agassiz. Southwest of Stellwagen Bank, off 
Race Point Light, Cape Cod, Massachusetts. Temperature 3°.9C. 
10. Gorgonia sufruticosa, Dana. Fiji Islands. 
11. Gorgonia acerosa, Pallas. Nassau, Bahamas. Latitude 25°, 5' 6" N. 
12. Gorgonia acerosa, Caesar's Creek, Southern Florida. Latitude about 23° 
30' N. 
13. Muricea humilis, Milne-Edwards. Parahyba do Norte, Brazil. 
14. Muricea echinata, Valenciennes. Cape San Lucas, Lower California. 
Latitude 22° 52' N. 
15. Plexaurella grandiflora, Verrill. Mar Grande, Bahia, Brazil. 
16. Ctenocella pectinata, Valenciennes. Torres Straits, Australia. Latitude 
about 10° S. 
17. Xiphogorgia anceps, Pallas, Caesar's Creek, Florida. 
18. Rhipidogorgia flabellum, Linne, Bermuda. Latitude about 32° N. 
19. Rhipidogorgia flabellum, Andros Island, Bahamas. Latitude about 25° N. 
20. Leptogorgia pulchra, Verrill. La Paz, Gulf of California. Latitude 24° 
16' N. 
21. Leptogorgia rigida, Verrill. Cape San Lucas, Lower California. 
22. Phyllogorgia quercifoliay Dana. Fernando de Noronha, Brazil. Latitude 
3°50'S. 
The complete analyses of these alcyonarians, which will be published 
in our final report, show very variable proportions of organic matter. 
