OF THE UNITED STATES. 73 
ANIMALIA ARTICULATA. 
ANNELIDES. 
SERPULA. 
1. S. barbata, (S.G. M.) PI. xv, fig. 12. 
Specific character. With three or four distinct, longitudinal, 
tortuous, dentated lamella, projecting from the surface. 
A very remarkable species from Alabama. Mr. T. A. 
Conrad. 
2. Dr. M‘Euen found another species, smooth and 
much smaller, near Deal, in New Jersey. 
3. Mr. Say (Amer. Journ. Science, vol. ii,) mentions 
another species with sixteen equal coste, from New Jer- 
sey. I have not seen it. 
Hamuuus, (S. G. M.) 
Generic character. Tubular, regular, involuted; volutions 
distinct; aperture circular. 
A genus allied to Dentalium and Serpula, but differing 
in its constant involuted form. 
H. onyz, (S.G.M.) PI. ui, fig. 8, and pl. xvi, fig. 5. 
Specific character. With six elevated, angular, longitudinal 
ribs extending from base to apex. 
Length, about an inch. 
The imperfect specimen figured on plate 11, was ob- 
tained by Dr. Blanding at Lynch’s creek, South Carolina, 
in the green sand, and on a former occasion was supposed 
to be a Dentalium. Pl. xvi, fig. 5, however, represents 
the perfect shell from the older cretaceous deposits at 
