646 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
ROSTRICELLULA PLENA ALTILIS (Hall) 
Plate 130, D, figures 20-24 
Atrypa altilis Hatt, Pal. New York, vol. 1, p. 23, pl. 4 bis, figs. 9a-d, 1847. 
This subspecies in its extreme form can be readily distinguished from FR. plena 
by the compressed form and crowding of the costae. The variety seems to grade 
into normal forms of the species. Common in places. 
Type.—Holotype: A.M.N.H. 532/1. 
Horizon and locality—Valcour formation in New York: On the road along 
Little Monty Bay, $ mile north of Bocar Point, southeast of Chazy, and at Chazy, 
Rouses Point (15’) Quadrangle. 
ROSTRICELLULA PLENA PLICIFERA (Hall) 
Plate 130, C, figures 18, 19 
Atrypa plicifera Hatt, Pal. New York, vol. 1, p. 22, pl. 4 bis, figs. 8a-d, 1847. 
This name can be applied to a depressed shell with somewhat more spreading 
costae and rounder form than is usual in the species. Hall’s type specimen is 
somewhat crushed, and this may be the reason for the characters exhibited. As 
all the limestones of the Lake Champlain region have been much deformed, it 
is possible that some of the variation of the contained shells is due to deforma- 
tion during the squeezing of the limestone. A specimen almost identical with 
Hall’s type occurs with specimens that show other deformation. 
Type.—Holotype: A.M.N.H. 533. 
Horizon and locality.—Valcour formation in New York: On the west side of 
New York Highway 22, on Kennon Brook, 4 mile south of East Beekmantown, 
Plattsburg (15’) Quadrangle; Chazy, Rouses Point (15’) Quadrangle. 
ROSTRICELLULA PRISTINA (Raymond) 
Plate 132, B, figures 6-10 
Camarotoechia pristina RAyMonp, Amer. Journ. Sci. ser. 4, vol. 20, p. 368, 1905; Ann. 
Carnegie Mus., vol. 7, No. 2, p. 225, pl. 24, figs. 1-10, 1905. 
Type.—Figured hypotype; A.M.N.H. 25047/2. 
Horizon and locality—Crown Point formation in New York: Sloop Bay, Val- 
cour Island, Lake Champlain, Plattsburg (15’) Quadrangle. 
Discussion.—This species is characterized by its small size and the presence 
of 3 costae in the sulcus and 4 on the fold. Preliminary identifications of small 
Rostricellulas from the Lenoir of the Southern Appalachians were made with 
this species, but closer examination of the specimens and comparison with topo- 
types of R. pristina indicate different species. The Lenoir species is now re- 
ferred to R. basalaris and other species. 
ROSTRICELLULA PULCHRA Cooper, new species 
Plate 135, E, figures 26-35 
Shell of about medium size, wider than long; greatest width at or near the 
middle; apical angle nearly 100°; anterior margin truncated. Sulcus having 3 
