64 



IXDEX. 



Lunatia Lewisii. . . . 

 Lucapina crenulata. . 

 Luponia spadicea. . . . 

 Lyonsia Californica. . 

 Macoma inconspicua. 



nasuta 



Machara patula 



..26 

 ..36 



..24: 



. .59 

 . 55 

 ..56 

 ..57 



Marginella Jewettii 26 



Modiola capax 48 



modiolus. 



recta 48 



Monoceros engonatum. . . .20 



lapilloides. ... 19 



Moon shell 26 



Mopalia muscosa 41 



Mussel 4" 



Mya arenaria 58 



My til as Cal i fornian as .... 47 



edalis . . A J 



Nacella incessa 38 



Nassa Coo peri 23 



fossa t a .22 



mendica 23 



perpinguis 22 



Natica clausa 2.7 



Olive 23 



Olivella biplicata 23 



baetica 24 



Opalia borealis 28 



Omphalitis fuscescens ... .31 

 Pachydesma crassatelloides52 

 Pachypoma gibberosnm. . .30 

 Parapholas Californica. . . .60 



Periwinkle 28 



Pecten aequisulcatus 46 



liastatus 46 



latiauritus 46 



Petricola carditoides 53 



Phasianella compta 29 



Pheasant-shell 29 



Pholadidca penita 59 



Piddock 59 



Placuanomia macroschisma45 



Pomaulax undosus 30 



Psammobia rubro-radiata.56 



Pteronotus festivus 17 



Purples 18, 19 



Purpura canaliculata 18 



crispata 19 



saxicola 18 



Ranella Californica 17 



Razor-shell 57 



Rock-clam 52 



Rupellaria lamellifera. . . .54 



Sand shell 56 



Sanoftiinolaria Nuttallii. . 56 

 Scalaria crebricostata. . . .28 



Scallop 45 



Sehizothoerus Nuttallii : . 54 



Scurria mitra 38 



Septifer bit'tircatus 49 



Slipper-shell 37 



Solecurtus Californianus. .57 



Solen rosaceus 57 



sicarius 57 



Spindle shell 17 



Tapes staminea 53 



tenerrima . . .54 



Tellina Bode^ensis 55 



Tellen 55 



Tonicia lineata 42 



Top-shells 29, 33 



Tornatella punctocselata. .43 



Triangle-shell 52 



Trivia Californica , . 25 



Trochiscus Norrisii 33 



Turban 31 



Trigona 52 



Univalve, description of.. .9 



Washington clam 54 



Wedge-shell 57 



Zirphsea crispata 60 



ERRATA. 



Pa^e 6, line 19 ; for '* in," read is. Pajre 8, line 

 read op.rculum. Page 24, line 32 ; for "£>jfn\ 



for " o^erclum, 



Ow .er 



'w^l^- 



