1895. ] NEW YORK ACADEMY OF SCIENCES. 129 
MOLLUSCA. 
HYOLITHELLUS, Billings. 
HYOLITHELLUS MICANS, Bill. ? 
Hyolithus micans Bill. Can. Nat.,2d Ser., vol. vi., p. 215, figs. 
3a, b, p. 213. 
Hyolithellus micans Walcott, U. S. Surv. Bull. 30, p. 142, pl. 
xiv., fig. 2a to e. 
Trans. Roy. Soc. Can., vol. xi., sec. iv., p. 94. 
A slender hy olithoid shell not easily distinguishable from 
Billings’ species occurs sparingly in the hard shales of Assise 2, 
at Hanford Brook. 
COLEOIDES, Walcott. 
CoOLEOIDES TYPICALIS, Wale? 
Ws. Nat. Mus. Proc., vol: 12, p: 37. 
Fauna of Olenellus Zone, p. 624, pl. Ixxix., Figs. 6, 6a. 
A fragment of a long, longitudinally striated fossil, which re- 
sembles Walcott’s species above named, is found in one exam- 
ple in the beds of Assise 2 at Hanford Brook. 
ORTHOTHECA, Novak. 
Zz : 
OrtTHOTHECA cf. EmMmonst. PI. vi., fig. 1. 
Hyolithes Emmonsi Ford. Am. Jour. Sci., 3d Ser., vol. ii., p- 
244, figs. 3a to ec. 
Hyolithes conmunis var. Emmonsi Wale. U. 8S. Geol. Surv. 
Bull. 30, p. 137, pl. 14, fig. 4a to b. 
Trans. Roy. Soc. Can., vol. xi., sec. iv., p. 95, pl. 16, fig. 10. 
HYOLITHES, Eichwald. 
HYo.ituHeEs cf. PRINCEPS, Bill.? 
Can. Nat. New Ser., vol. vi., p. 216, figs. 4a and 6 of p. 213. 
U.S. Geol. Surv. Bull. 30, D. 135, pl. xlii., figs 5a and b. 
Among the fossils collected are specimens of a large Hyo- 
lithes, which by form and size resembles the above species, but 
the specimens are too imperfect to make the identification sure. 
Locality and horizon. Siliceous shales at the bottom of As- 
sise 3, Hanford Brook. 
TRaNsacTions N. Y. ACAD. S€r., Vol. XIV., Sig. 9, May 18, 1895. 
