Cardita subquadratar cee sactans lute cate me cel ceissene te ee seae teeter eee ere Eee Cpr. 
—Lazaria subquadrata. 
Cardiumucorbis:c....2 20 sSisssssciesianucescuscls se atten civaumrisseine she ees ae eeeeeee Mart. 
‘Rare, although found in considerable numbers farther south. 
PFOGETUMS y jon, csisees Sely.Gsaassioc sdctdeqmeesiatd ave so sh soda seieeseaont eter eeeees Sowb. 
This cardum, although formerly found alive here, is now only 
found in a sub-fossil condition on the shore of Spanish Bight. 
Quad rigen arin. 6.15. ccseven oe sconces Osee selene te sesiioscena eee ee eeneeee Conr. 
Cavolinvauinilexa js. Sees eh ascisca aces eee ne eect Geen Ce eee Lesueur 
Dr. 600 fathoms. 
tridentata w7..vescescusnt Soothe ee neces CE EEC eee PEPER at ih Gmel. 
Dr. 120 fathoms. 
trISPINOSA oo. Sars san dees b st tesiating sotctecarlg tithe teat eae eee eRe Lesueur 
Dr. 400 fathoms. 
Cenithideakcalittonnicateesc- ence tease cee eee oe eee eee eee eee eee Hald. 
Formerly listed as Cerithidea sacrata, Gld. Found in great num- 
bers on mud at middle tide, and on salt marshes. 
californica, var. hyporhyssa 
Described in Nautilus, Vol. XIX, No. 
Cenithiopsisrassiml atalerecacases-eeseereeeeteer erate 
oloy bb 00h a RaP ORM Enea ae Ame mecacnon Racer acuiedierr intends sanbonctioonae od dacooosce 
FUMES Cosson op osongs dodsodvonosdone dasao8 opsh68 assunnoce ave08s 
Dr. 5 fathoms. 
TMUMITAN, «5 cca oreaeciew Ranta ugeiesesise (aes + sltells cep elesietiee tas Meat eee eee Cpe 
Dr. 8 fathoms, 
PUT PUTOA cece ceawaeersiet oisiiiecases selene eyaaseetincstite  <etee Se eee sere ee eee eee Cpr. 
EUDeKCWlatatesa cane ees we Attias atieiee eee iad REE Mont. 
Dr. 10 fathoms. These small forms, often found in drift, are very 
difficult to determine without the aid of a good glass. 
Chaetopletinaghar twie Sileereeneeeeesee see eeeee eee eee ere re taree Jee Seen Cpr. 
luridas Wart prasinatal...sa-cesccmes ecco steer doericeacteee eee Cpr. 
Dr. 75 fathoms. My specimen, found on a rock, drawn upon lines 
of fishermen. 
pon OU sa | bt Rap aar ees cs Ocean Teer Scn Sacer teal ce ener RAMS dnlaratinc’nsoo0070° Cpr. 
ChamavexO Osa joa sess teceenes sean ae anete mina raate ei pree: seme eee een Eee Conr. 
j0)5) DUS o) (ak: eee eenseoe ane aremeerens aoe ncrUprcaceiene Siemdcerry aocuntasinaus Abisoghcc Sowb. 
Quite common on rocks, often growing side by side, and only dis- 
tinguishable to a casual observer by the difference in direction 
of the spiral turn of the upper valve. 
Chione EXCAVatal ss ..c0sesacmsen Seine cee deselsecataatbencaet voercbinstecies ss ope ee eeee tee Cpr. 
flinectilfragiay <Ssc0.sdevmacematcsesn ane ceeacde seer cee eae woe wnat Sby. 
Stil ima ssc ae, kaS.c eacbioacekc Reet neeersoenee ese aCe eee CeCe EEC EEE Sby. 
SUCHET icano. qadenodos sedcoseos sidsid std s0(; Be 8 heres baie aatectheeare se eee epee Val. 
Chlamy doconchaorcuttiss 5c. -cdeesee ee seeee ee eeen eee eee eee eee eee eater Dall. 
A rare bivalve, discovered by Mr. Orcutt at False Bay. he shells 
are entirely concealed within the whitish, spongy portions of the 
animal. 
