Microvoluta 
Minolia .... ... aa bss east 
114 EU STe) 5 2 ae eae Cos ane SEES 
Modiolus ... 
AVA foraticdeete wee. cc) 
Mionodonta. 2.) fie 5s) eens. 
IMIR Scns o's, 2s cis cen 
Musculus ... 
Natica ... 
Nepotilla... 
Nerita 
Nuculana ... 
Neotrivoniia.../ veo ls. 
til vdieo: ee pele 650 Gob ede 
WING OVeI ENING WE aeees coo -conmBae 
Nivodonaiss .6 seus eke 
(NIGIR ESF Re IRN ces, CG EAAER 
ny RvtHIG TS ee ab aiie rc! Scio. com Ibee 
INGRIGAMANGE so: . copteeteroed ees 
INESSAT TUS S25, cee eee ae 
INiatisiboriayy ..2cccemeeseeea ore 
Neolepton <=: (22-7 225 -e- 
INObOCIRIRIIS 2" Rerateiscts tee. 
INiotomnyotlus::seecen ae) cn 
INGbOSEbIae) <a oes Scud ae. 
INiieullay aoa hee sekcuee nice 
Odostomiay sures vessutee lees 
Olive Wwe sete eae eee 
Onehidella; ee ee eae 
Onythoteuthis ... ... ... ... 
Onbitestellawee. sess... sca ees 
@sSeillagee ye eee atk es 
Ostrear .-. 
Panope ... ... a 
Parviterebra aes 
Ramypliamibalesacect aces sos a 
aGellan dee sct-ccea soo. sah aos 
Patelloida ... 
IRecten=s ss... 
Pallitoriwa.., 2. 4. oo ke 
Personella ... 
iRetricolarraiecs eases: eae 
iRetterdianawen sos ce. scence 
Diiailnrianeesae ents hes es ans 
Ainnsnenvellly 54. coaeeea abe ope 
Phenacolepas ... 
holiness 
Philobrya ... 
Ee aOR a. odie 
Pholas.. 
STG 5h. aie ea fete eee 
Planorbis ... 
see nee 
Pilarxap hora i: ccs. sss a 
Piesiotrochus 
see tee 
Polinices ...°... 
BY W. L. MAY. 
Roly pus cates 
Poroleda.. 
Poromya .. eee 
Potamopy. reus iby ees a 
Pronucula ... 
Pseudamycla 
Pseudarcopagja ... 
Pseudodaphnella 
Pseudoraphitoma 
Pseudorissoina ... 
Bteria wren lee ifs a HH) 
PA SNUG eis one 
Puneturella sss ls eee 
Py aZs: S745) rn fe, Ce eee 
Rvnenen ane 
Retizafra 
RSbisa Faia eee ealwe eee 
RibizZOEUSesss eee eee 
Rhyssoplax ... 
Prayer eee ha eee 
Risellopsigeiiin dao ase ee 
Fvissotnay, 005, Vaca sees 
RiSsolimaesee sone 
Rissopsis ... . 
Roccllaria 5s te he eens 
Rochtton tia eee tee ee 
IRoxa mice) oa 
Bigya. 3) edge ae lok vo 
Salinator... ... 
Saxicava... .. 
Seabrellave).. oneeae 
Seaphellaey a0. ce ieee 
Sebismope. 4260 ian 
Scissurella ... ... . 
SGuibtisepene eames 
Segmentina.:../s.s: seas 
Seila . 
tee wee 
Senteleya/. 5. 14\ . eee 
Sepia ... . 
Sieepatelie: eae 
Siliquaria ... 
Sinum 
Siphonaria ... ... 
SUUEIISe. ces eine 
Solengs 
Soletellina ... . a if 1 : 
Spherium ... 
Spiratella . 
Spherochiton ... 
Spinulas-s) ee 
Spisulageee ees 
Spondylus 
Stomatella . 
Strombiformis ... 
Subonoba .. 
eee eee 
Stephopoma... ... ee es 
Stiliteri oe eee 
