Handbook of Paleontology 181 



extend into this region it shows a gradually increasing 

 number of west coast species and also species character- 

 istic of the eastern boreal region which have passed 

 through the cold waters north of America into the Pacific 

 waters by way of the Bering sea. The Calif ornian Prov- 

 ince reaches from Vancouver to Cape St Lucas. In this 

 province one notes a large development of patelliform 

 (limpetlike) mollusks, Haliotis (the Abalone) and the 

 chitons. The Panamic Province which includes the Gulf 

 of California extends to South America and in its warm 

 waters has developed one of the richest and most inter- 

 esting of the faunas of the world. 



LITERATURE 



The references given here will be only such as are 

 within the scope of the beginner. Some of them have 

 full lists of references, so that any student can pursue 

 his studies further if he wishes. The two books particu- 

 larly recommended for the discussions of the rocks are 

 Lahee ('23) and Pirsson ('10; '26 rev. by A. Knoff). 

 To these references may be added any good textbook of 

 geology such as Chamberlain and Salisbury ('09, ch. II) ; 

 Cleland (T6, ch. VI-X; rev. '30); Grabau ('20, ch. V, 

 VI, XI, XII, XVI-XX); Pirsson ('20, ch. XI-XIV) ; 

 Pirsson and Schuchert ('15, ch. XI-XIV) ; Scott ('24, pt 

 II). Grabau ('13) is a more advanced and more techni- 

 cal piece of work but here will be found numerous full 

 bibliographies. 



Many sources have been drawn upon for the chapters 

 on conditions of life in the sea today, but the following 

 references, some of which carry additional bibliographies, 

 will suffice for the beginner. First should be mentioned 

 Flatterly and Walton ('22) and Verrill (73). Other 



