630 GEOGRAPHICAL ZOOLOGY. [part iv. 



Family 31.— TOENATELLID^. (7 Genera, 62 Species living, 

 166 fossil.) 



Family 32.— BULLION. (12 Genera, 168 Species living, 

 88 fossil.) 



Family 33.— APHYSIAD^. (8 Genera, 84 Species living, 

 4 fossil.) 



Family 34.— PLEUROBEANCHIDiE. (7 Genera, 28 Species 

 living, 5 fossil.) 



Family 35.— PHYLLIDIAD^. (4 Genera, 14 Species living, 

 fossil.) 



Family 36.— DOEID^. (23 Genera, 160 Species living, U 

 fossil.) 



Family 37.— TEITONIAD^. (9 Genera, 38 Species living, 

 fossil.) 



Family 38.— ^OLID^.. (14 Genera, 101 Species living, 

 fossil.) 



Family 39.— PHYLLYEHOID^. (1 Genus, 6 Species living, 

 fossil.) 



Family 40.— ELY SI A D^.. (5 Genera, 13 Species living, 

 fossil.) 



