. Bulletins of American paleontology. Fossil Lepic\thara in Tropical America: Jung 45 /• / V, 1 x13 ;»:. 3 x70 2 x70 ,„fit»irfti^ Text-figure 47.—Lepicytltaia polygons (Gabbl. ANSP 79314. Paralectotype (with 17 axial ribs on body whorl). Cibao Region. Dominican Republic. Exact locality and age unknown. Height mm. width .^.4 mm. 1. from left side: 2. enlargement of apical area; 3. enlargement of apical view. imens from nine localities along Rio Cana. and 635 from 13 localities along Rio Gurabo. It is not surprising that this large amount of material shows some variability in seve
. Bulletins of American paleontology. Fossil Lepic\thara in Tropical America: Jung 45 /• / V, 1 x13 ;»:. 3 x70 2 x70 ,„fit»irfti^ Text-figure 47.—Lepicytltaia polygons (Gabbl. ANSP 79314. Paralectotype (with 17 axial ribs on body whorl). Cibao Region. Dominican Republic. Exact locality and age unknown. Height mm. width .^.4 mm. 1. from left side: 2. enlargement of apical area; 3. enlargement of apical view. imens from nine localities along Rio Cana. and 635 from 13 localities along Rio Gurabo. It is not surprising that this large amount of material shows some variability in several respects. As indi- cated in the description the number of axial ribs on teleoconch whorls varies greatly but differently from river to river. The number of axial ribs on early teleo- conch whorls varies from ten to thirteen on Rio Mao. from eight to eleven on Rio Cana, and from ten to thirteen again on Rio Gurabo. The corresponding num- ber on the body whorl varies from 14 to 23 on Rio Mao, from 12 to 18 on Rio Cana, and from 13 to 28 on Rio Gurabo. The protoconch is said to vary from to volutions in the above description. As a matter of fact, it varies from to volutions in the material from Rio Mao. but from to in the material from Rio Cana and Rio Gurabo. In addition the initial vo- lution in the material from Rio Mao is very slightly smaller than that in the material from Rio Cana and Rio Gurabo. Whether this has to be interpreted as a geographic variation remains undetermined for the time being. Stratigraphically, the material from Rio Mao occurs between Bluff 2 and 3 of Maury, which corresponds to about 45 m of section within the Cer- cado Formation. In Rio Cana, L. polygona occurs from 170 to 230 m in the section, over a thickness of 60 m in the upper part of the Cercado Formation, and in the Rio Gurabo from 80 to 140 m in the section. also over a thickness of 60 m in the upper pail of the Cercado Formation. Thus, L. pol
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