246 
GEOLOGY OF THE FOURTH DISTRICT. 
3. Orthis tenuistriata, n. s. — Broad elliptical; beak small, rather prominent; surface 
covered with very fine radiating striae, which are crossed by a few concentric wrinkles. 
This is more finely striated than any shell of this genus in the district. 
Locality —Shores of Crooked lake. 
4. Lucinal retusa, n. s. — Obliquely suborbicular; beak small, oblique; surface marked 
by concentric lines, which are much stronger on the anterior margin. 
Locality —Shore of Lake Erie, in Chautauque county. 
5. Nucula lineolata , n. s. — Obliquely ovate ; posterior slope straight; surface marked by 
regular, equal concentric lines, which terminate upon the posterior slope before reaching th« 
margin of the shell. 
Locality —Lake Erie shore in Chautauque county. 
6. Astarte subtextilis, n. s. — Suborbicular ; beak prominent; surface marked by strong 
concentric folds and finer lines, which are crossed by a few faint elevated radiating striae. 
The shell is incorrectly figured. 
Locality —Lake Erie shore in Chautauque county. 
7. Bellerophon striatus? ( Bronn. Phillips, Palceozoic Fossils, pi. 40, f. 198.) — Sub- 
globose, carinated ; “ keel narrow, elevated ; surface marked by fine arched striae which meet 
the keel in a slight retral angle.” Phillips. 
Our fossil agrees precisely with this part of the description, but the aperture is less broad 
than the figure of Mr. Phillips. 
Locality —Shore of Lake Erie, Chautauque county. 
8. Goniatites bicostatus , n. s. — Sub-globose or discoidally involute ; umbilicus moderate, 
very distinct; last whorl with a distinct subdorsal elevated line on each side; surface marked 
by arched striae extending from the umbilicus and meeting the elevated line at an acute for¬ 
ward angle, and receding from it on the back at a more acute retral angle. 
Locality — Shore of Lake Erie, Chautauque county. 
9. Goniatites sinuosus (Illustration No. 106, page 243). — Discoidal; involute; surface 
marked by undulating striae. 
This fossil seems referable to the species above, though the marks of septa are very in¬ 
distinct. It is thus known to range from the Genesee river to Lake Erie. 
Locality — Lake Erie shore, Chautauque county. 
The following among the most beautiful of the crinoideans in the system, occurs in this 
group; the sculptured column and tentaculated arms and fingers place it among the most 
ornamental forms of this family of fossils. 
