NATURAL SCIENCES OP PHILADELPHIA. 
427 
pressus , Sandb. (Verstein, Taf. xxii. 6.) == B. striatus , Sow. My specimens 
have the transverse section and external markings of the latter, but they are 
less capuliform (See Murch. Sil. Syst., 604, iii. 12e). 
Bellerophon nautiloides, n. sp.—Shell involute, scarcely umbilicate, longi¬ 
tudinally striate and deeply notched. Dorsum regularly rounded, sometimes 
slightly raised along the peripheral band; sides less convex than the dorsum, 
bending into a small shallow umbilicus, not disclosing previous whorls. 
Aperture crescentic, width about equal to its height, strongly auriculate. 
Notch deep, but obtuse, broad, infundibuliform, with its margins reaching to 
the tips of the auriculations. Exterior surface longitudinally striate, with 
fine sharp raised lines marking the sides as well as the dorsum. Cast 
smooth, perforately umbilicate, exposing two whorls. 
Diameter of large specimen *50 (100) ; height of whorl at aperture *31 (62); 
depth of impression of inner whorl into outer *09 (18) : height of aperture *22 
(44); width of aperture ‘27 (54); separating distance between tip of auricu- 
lation and inner whorl -10 (20) ; depth of notch ’17 (34). 
Locality .—Moscow, Battle Creek, Marshall, and near Grandville, Kent county. 
Bellerophon Michiganensis, n. sp.—Shell globose, carinate, involute, 
scarcely umbilicate, longitudinally and transversely striate. Dorsum obtusely 
angulated by the peripheral band, which is slightly raised, and more distinctly 
relieved by a furrow which runs along each margin. Dorso-lateral surfaces 
regularly convex, bending (in the cast) abruptly into a small perforate umbil¬ 
icus. Aperture suddenly and widely expanded, broadly auriculate, and with 
a broad, rather shallow notch. Exterior of shell not seen; casts generally 
nearly smooth or faintly marked by longitudinal striae, sometimes distinctly 
marked by two sets of striae, the longitudinal consisting of 8 to 12 prominent 
raised lines on each side of the band, with one or two small intervening striae, 
which gradually attain the size of the larger, these being crossed by finer, 
less regular transverse striae, broadly curved anteriorly on the sides and sud¬ 
denly bent backwards on the dorsum. 
Diameter of last whorl (of cast) -23 (100) ; height of aperture *14 (61); 
diameter of aperture *35 (152); diameter of whorl *08 (35) back from the 
aperture *25 (109) ; diameter of next inner whorl where it touches the lip *17 
(74) ; width of band close to aperture *07 (30) ; depth of notch *04 (17). 
Localities. —Battle Creek, and the vicinity of Grandville, Kent county. 
The characteristic of this species when compared with B. galericulatus is its 
great width in relation to its height, its much greater expansion of aperture, 
and its transverse strise. The existence of a carina distinguishes it from B. 
lineolatus, Hall, from Rockford (13th Ann. Rep. Reg., N. Y., 107). 
Bellerophon Barquensis, n. sp.—Shell small, globose, involute, rapidly en¬ 
larging, dorsally depressed ; umbilicus small, but deep; dorsum broadly con¬ 
vex, with a distinct raised band ; sides sharply rounded into the umbilicus ; 
aperture crescentic, expanded, with a deep broad constriction behind it; notch 
deep and narrow. Surface marked by fine, regular, longitudinal lines, which 
cover the band as well as the other parts. 
Diameter *48 (100) ; transverse diameter of aperture *54 (112) ; height of 
aperture to middle of umbilicus *27 (56). 
Locality. —Pt. aux Barques, above the gritstones. 
Most nearly resembles B. Michiganensis , but the apertural construction and 
single set of strise render it easily distinguishable. 
Bellerophon lineolatus, Hall (13th Rep. N. Y. Reg., p. 107).—An imperfect 
specimen agreeing fully with Hall’s description. 
Locality .—Holland, Ottawa county. 
Goniatites, de Haan. 
Goniatites RoMrNGERi, n. sp.—Shell of moderate size, globoid, exumbilicate. 
1862 .] 
