Crenella eiecussata (Montagu) 1808 81 



Genus Solainen Iredale 1924 81 



Sola?nen columbianu?n (Dall) 1897 82 



Genus 5o/M/flMorch 1853 83 



Botula fusca {GmtWn) 1791 86 



Genus Dacrydiian Torell 1859 86 



Subgenus Quendreda Iredale 1936 86 



Dacrydium (Quendreda) elegantulum n. sp 87 



Genus .:/^«/fl Adams 1857 88 



Adula falcata {GoxxlA) 1851 89 



Adula soleniformis (Orhigny) 1846 90 



Adula californiensis (Philippi) 1847 90 



Jdula die ffensis (Dall) 1911 91 



Genus Lz//!o/)//<7^(3 Roding 1798 91 



Subgenus Stumpiella nov 93 



Lithophaga (Stumpiella) calyculata (Carpenter) 1856 . . . 93 



Subgenus D/'Z/^rMj Dall 1898 94 



Lithophaga (Diberus) canalifera (Hanley) 1843 . ... 95 



Lithophaga (Diberus) plumula (Hanley) 1843 96 



Lithophaga (Diberus) subula (Reeve) 1857 97 



Subgenus ikfjo/orf^/ij Fischer 1886 97 



Lithophaga (Myoforceps) aristata (Dillwyn) 1817 . . . . 98 



Subgenus Lfl^w Dall 1916 99 



Lithophaga (Labis) attenuata (Deshayes) 1836 99 



Lithophaga (Labis) peruviana (Orbigny) 1846 100 



Subgenus Leiosolenus Carpenter 1856 101 



Lithophaga (Leiosolenus) spatiosa (Carpenter) 1856 . . . 102 



Lithophaga (Leiosolenus) hancocki n. sp 102 



List of material of the family Mytilidae preserved in the Allan 



Hancock Foundation collections 104 



References cited 145 



Plates 155 



