TERTIARY AND QUATERNARY PALEONTOLOGY, NORTHEASTERN FLORIDA 31


between the two formations and the determination of the limits of the southward migration of the species from the 'Waccamaw' fauna.
 "Structure :-The Nashua marl is exposed at only a few localities in
the St. Johns Valley and it is difficult to form ,nv' definite idea1 concerning its structure. It has probably been subjected to the same deformation
as the Caloosahatchee marl, but the isolated exposures afford no opportunity to observe evidences of folding. The dip is doubtless seaward and it is probably very slight.
 "Local Details:-In the St. Johns Valley there are a number of exposures of the Pliocene marl which have been designated the Nashua mnarl. At the type locality, one-fourth mile south of Nashua, Puitinm County, there is an exposure of five feet of white sand, restin" un1conformably upon about fifteen feet of white shell marl...

 LISTS OV SPECIES F5ROM THE NASHUA MARL
4865.-A quarter of a mile south of Nashua, Putnam Co., Fla. (Type
 locality of the Nashua marl). (See Matson, G. C., and Clapp,
 F. 0., Fla. Geol. Survey, 2nd Ann. Rep't p. 130, 1909.)

 Approved or Changed. Original.
Terebra protexta (Conrad), not found. Terebra protexta Conrad. Terebra dislocata (Say). Terebra dislocata Say.
Terebra concava (Say), var. ( ?) Terebra concava Say.
Conus marylandicus Green. Conus marylandicus Green.
Oliva literata Lam'k. Oliva literata Lamk.
Olivella mutica (Say). Olivella mutica Say.
Marginella limatula Conrad. Marginella pardalis Dail.
Marginella cf. M. floridana Dail. Volutella amiantula Dail.
Busycon maximum Conrad (?) (yo.). Fuigur maximum Conrad.
Eupleura miocenica, var. near intermedia Eupleura miocenica var. intermedia
 Dail. Dail.
Urosalpinx, near perrugatus Conrad. Murex pomnum Lion. Ilyanassa porcina (Say), var. ( ?) Ilyanassa porcina Say. Ilyanassa isogramma Dail ( ?) Ilyanassa isogramma Dail.
Ilyanassa granifera, var. sexdentata
 Conrad. Ilyanassa granifera Conrad.
Ilyanassa porcina (Say), var. Nassa scalaspira Dal].
Anachis avara, var. translirata Ravenel. Anachis avara var. caloosxnsis Dail. Turbonilla. *Turbonilla.
Eulima. Eulima.
Cerithiopsis greeni C. B. Ads. Cerithiopsis greeni C. B. Ads.
Crucibulum cf. C. auricula Gmeiin (yo.). Crucibulum auricula Gmelin. Crepidula convexa Say, ( ?) (yo.). Crepidula convexa Say.
Natica pusilla Say (?). Natica (Cryptonatica) pusilla Say.
ittorina irrorata (Say). Littorina irrorata Say.
Dentalium, near D. carolinense Conrad. Dentalium carolinense Conrad.
 Arca (Ncetia) limula, var. platyura Arca (Ncetia) limula, var. platyura
 Dail. Dail.