Clark: The San Lorenzo Series of Middle California 51 



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Genus Murex 17(> 



Murex (Oeinebra) sobrantensis, n. sp 176 



Family Thaisidae 177 



Genus Thais 177 



Thais paeki, n. sp. 177 



Family Fusidae 177 



Genus Fusinus 177 



Fusinus (Priscofusus) hecoxi Arnold 177 



Fusinus (Exilia) lincolnensis (Weaver) 178 



Fusinus (Exilia) pinolianus, n. sp 170 



Genus Perse, new genus 179 



Perse corrugatum, n. sp 180 



Genus Pseudoperissolax, new genus 181 



Pseudoperissolax merriami, n. sp 181 



Pseudoperissolax ? sp. indt 182 



Genus Agasoma 182 



Agasoma acuminatum Anderson and Martin 182 



Agasoma gravidum Gabb 182 



Agasoma gravidum multinodosum, n. var 183 



Genus Clavella 183 



Clavella calif ornica, n. sp 183 



Family Volutidae 184 



Genus Miopleiona 184 



Miopleiona sp 184 



Miopleiona indurate (Conrad) 185 



Family Olividae _ 185 



Genus Olivella 185 



Olivella quadriplicata, n. sp 185 



Genus Ancilla 185 



Ancilla fishii Gabb 185 



Genus Bullia 185 



Bullia buccinoides Merriam 185 



Family Cancellariidae 186 



Genus Cancellaria 186 



Cancellaria ramonensis, n. sp 183 



Cancellaria sobrantensis, n. sp 187 



Cancellaria, sp. A 187 



Cancellaria ? sp. B 187 



Family Acteonidae 188 



Genus Acteon 188 



Acteon kirkerensis, n. sp 188 



Family Scaphandridae 188 



Genus Cylichna 188 



