122 FLORIDA GEOLOGICAL SURVEY ELEVENTH ANNUAL REPORT. 
by a continuation of some of the concentric lamellae. The con- 
centric lamellae are closer spaced and give a more even appearance 
to the shell sculpture. 
In size the shell resembles Phacoides tuomeyi Dali, but it has 
more radial ribs and leaf like sculpture on the posterior dorsal area. 
The type (Cat. No. 16821$, U. S. N. M.) measures: right valve, 
length 9.0 mm., height 9.1 mm., diameter (double) 5.8 mm. 
Type locality — Upper marl bed about one mile south of DeLand, 
Volusia County, Florida. Dr. E. H. Sellards, collector. 
1 4 
Fig. 9. New Pliocene Invertebrates. No. 1, Epitonium delandense n. sp. ; 
No. 2-3, Gemma trigona Dali, new subspecies delandensis ; No. 4, Phacoides 
(Bellucina) waccamawensis Dali, new subspecies delandensis. 
