94- PALAEONTOLOGY 



contain all the viscera. The ink-bag has been very rarely 

 found, and is even smaller than in the last genus, as if in 

 relation to the more greatly developed shell. 



The Conoteuthis (fig. 22, 3) of the Gault has an oblique 

 phragmocone, with a very thin shell, and seems to have been 

 attached to a slender style, like the funnel-shaped appendix 

 of the gladius in the recent sagittated Calamary. 



Mr. Dana has described, under the name Helicerus Fugi- 

 ensis,& belemnitoid fossil from the " slate" rock of Cape Horn. 

 It is half an inch in diameter, has a thick fibrous guard, and 

 the slender phragmacone terminates in a fusiform spiral 

 nucleus.* 



Subjoined is a table of the extinct genera of the mollus- 

 cous province : — 



Brachiopoda. — Trigonosemus, Lyra, Magas, Ehynchora, ^1- 

 lania, Stringocephalus, Meganteris ; Spirifera, Cyrtia, 

 Suessia, Athyris, Merista, Eetzia, Uncites ; Camaro- 

 phoria, Porambonites, Pentamerus, Atrypa, Anoplotheca ; 

 Orthis, Orthisina, Strophomena, Koninckia, Davidsonia, 

 Calceola ; Producta, Chonetes, Aulosteges, Strophalosia ; 

 Trematis, Siphonotreta ; Obolus. 



Conchifera. — GrypliEea, Exogyra, Limanomia, Carolia, Placu- 

 nopsis, Neithea, Eligmus ; Pteroperna, Aucella, Am- 

 bonychia, Cardiola, Eurydesma, Pterinea, Monotis, 

 Posidonomya, Aviculopecten, Gervillia, Streblopteria, 

 Pulvinites, Inoceramus, Trichites ; M egalina, Orthonotus, 

 Modiolopsis, Hoplomytilus ; Macrodon, Tsoarca, Bake- 

 wellia, Nuculina, Nucinella, Cucullella, Ctenodonta ; 

 Myophoria, Axinus, Lyrodesma ; Diceras, Monopleura, 

 Eecjuienia ; Hippurites, Eadiolites, Caprinella, Caprina, 



* For the drawings and most of the facts, or their verification, relating to 

 invertehrate fossils, the writer is indebted to his experienced colleague in charge 

 of that department of the British Museum, Mr. S. P. Woodward, F.G.S. 



