50G 
GEOGRAPHICAL ZOOLOGY. 
[part IV. 
Family 6. — BELEMNITIDiE. Fossil. (6 Genera, 100 
Species). 
Distribution. — Lias to C.halk in Europe, India and North. 
America. 
Order II. — TETRABBA NOHIA TA . 
Family 7. — NAUTLLIDHL (1 Genus, 3 Species, Living; 4 
Genera, 300 Species, Fossil). 
Distribution. — Indian and Pacific Oceans ; and the fossil 
species from the Silurian Period to the Tertiary, in all parts 
of the world. 
Family 8. — OKTHOCEKATIDiE. Fossil. (8 Genera, 400 
Species). 
Distribution. — Lower Silurian to Lias. 
Family 9.— AMMONITIDHL Fossil. (14 Genera, 1100 
Species). 
Distribution.' — Upper Silurian to Chalk. Found at 16,000 
feet elevation in the Himalayas. 
