I have found the following to be my most treasured and useful publications
as one who specializes in non-fossil Gulf / Floridian / Caribbean fauna.
(My top 25 or so in no particular order)
1)    Johnsonia - Harvard Museum of Comparative Zoology.
2)    The Nautilus - 3 generations, Abbott, Harasywich & Leal @
Baily-Mathews Shell Museum at Sanibel, Fl
3)    Memouria -  Occasional Papers of the Delaware Museum of Natural
History
4)    Occasional Parers on Mollusks - Harvard Museum of Comparative Zoology.
5)    Abbott 1972 - American Seashells, 2nd Ed
6)    Warmke & Abbott 1962 - Caribbean Seashells, Livingston Pub.
8)    Dall 1881-1889 - Reports on the Blake Expedition, Harvard Museum of
Comparative Zoology
9)    Petuch 1987 - New Caribbean Molluscan Faunas  &  1988 Neogene History
of Tropical American Mollusks
10)Rios 1994 - Seashells of Brazil  2nd Ed.  &  1970 Coastal Brazilian
Shells
11)Vokes 1983 - Distribution of Shallow-Water Marine Mollusca, Yucatan
Peninsula Mexico, MEI/MARI, Tulane U
12)Andrews 1977 - Shells & Shores of Texas 2nd Ed, UT Autin & 1981 Texas
Shells, UT Press
13)De Jong & Coomans 1988 - Marine Gastropods from Curacao, Aruba & Bonaire,
EJ Brill
14)Sutty 1986 - Seashell Treasures of the Caribbean, Dutton
15)Lyons 1989 - Nearshore Marine Ecology at Huchinson Island, FL: 1971-1974,
XI Mollusks, Fl Marine Research Pub, #47, FL Dep Nat Res.
16)Lipe 1991 - Marginellas
17)Calnan 1980 - Molluscan Distribution in Copano Bay Texas,  Bureau of
Economic Geo, T Austin
18)Springer & Bullis 1956 - Collections by the Oregon in the Gulf of Mexico,
Special Scientific Report # 196, USD o/t I, Fish & Wildlife Serv.
19)Bayer 1971 - New & Unusual Mollusk collected by R/V Pillsbury & Gerda in
the Tropical Western Atlantic,  Bulletin of Marine Science, V 21 # 1
20)Olsson & McGinty 1958 - Recent Marine  Mollusks from the Caribbean Coast
of Panama with the description of some new genera and species, Bulletins of
American Paleontology  V 39 # 177
21)Verrill & Bush 1898 - Revision of the Deep-water Mollusca of the Atlantic
Coast of North America with Descriptions of New Genera & Species, Part I
Bivalvia,  Smithsonian Institute, from the Proceedings of the United States
National Museum, Vol XX, pp 775-901 # 1139
22)Abbott 1958 - Marine Mollusks of Grand Cayman Islands, BWI, Monographs of
the Academy of Natural Sciences of Philadelphia # 11
23)McGinty 1955 - New Marine Mollusks from Florida, Proceedings of the
Academy of Natural Sciences of Philadelphia, V CVII pp75-85
24)Antonio Garcia-Cubas 1981 - Mollusks of a Tropical Lagoon System in the
Southern Gulf of Mexico, Inst Cienc. Del Mar y Limnol., Univ. Nat. Auto.
Mexico
25)Antonio Garcia-Cubas 1968 - Ecologia y Distribucion de los Micromolusos
Recientes de la Laguna Madre, Tampulipas, Mexico,  Bul 86, AP US
NSF-3420,Univ. Nat. Auto. Mexico
26)Antonio Garcia-Cubas 1969 - Ecologia y Distribucion de los Micromolusos
Recientes de la Laguna de Tamiahua, Viracruz, Mexico, Bul 91,  AP US
NSF-3420,Univ. Nat. Auto. Mexico