Nucleobranchiata. 
PPHEOUGE scccesccsvecesas ss 33 1 
FATIANTICRS  scccecesscoccee 22 159 
55 160 
2TEROPODA. 
Hyaleidae  ...ccssesseeees 52 95 
DGAMACTDIA .os.0c0c0s0 19 — 
Clonid@ ..rcvsse0ss reece 14 — 
85 95 
BRACHIOPODA. 
Terebratulidze ......... 67 340 
NUE ETIC“ Sas cecesevens _ 380 
Rhynchonellide ...... 4 422 
OPTION eesacscestercsc ~ 3828 
PLOCUCHIOB:..cccecceseees — 146 
CTENIAN BE ches ccoseocsccs 5 37 
MPISCINIA de ys ehoe ce vse eae 10 90 
MIM GUL sccsesceees 16 99 
102 1,842 
GENERAL 
Recent. Fossil. 
PPIPTAMCHTALD) varesssccckccees 204 189 
Tetrabranchiata .......0..0 6 2,193 
Prosobranchiata ............ 8,465 5,819 
Inoperculated Pulmonifera 5,404 542 
Operculated Pulmonifera.. 931 46, 
Tectibranchiata ............ 856 263 
Nudibranchiata.......e.00.... 318 = 
NUMERICAL ESTIMATE. 
Recent. Fossil. 
135 
Recent. Fo:sil. 
1,362 
638 
331 
1,142 
139 
58 
62 
103 
7,419 
Recent. Fossil. 
CONCHIFERA. 
Ostreida .......0. ectsesses 426 
Aviculide)<.0.0.necscess 94 
Miytilidzeys se scnesteset aah 
ANCATON see soxevaccnvenane 360 
Trigoniad............6 3 
ONI0NIM@ weceerecerereee 549 
@hamuidcetes-sesseeeceeee 50 
JeEbhNEOOES  Coscoosnonec _ 
Tridacnide..........0+s00 8 
Caxvdiadee ec csvesccecosess 200 
WGUCINIC CS teaee en aresereteee 178 
CYCIAMIAE ..scscrecreeees 176 
Cyprindce! ~<.. ..2ss0s0-060 176 
Veneridee 40.0 Wivisese - 600 
WiACirid pep essesece eel ss 147 
Melini dese se ssecse) scenes 560 
SOlENIDE cciccccrcacss suse 63 
Miyacidseliiiemsecnesearras 121 
Anatinida ......cccc000. 246 
Gastrochenide ......... 40 
Bholadidz ch vce secscasss 81 
4,295 
SUMMARY. 
Nucleobranchiata,.. sss. 55 
PLCTOPOUS ...sccceccccvecserses 85 
Brachiopoda ....secesscereesee 102 
Conchifera......+. H) eccuoondcd 4,295 
20,502 
168 
95 
18,568 
