322 BELLEROPHONTID. 
and it lacks the sharp tooth on the pillar with strongly marked 
sinus above and below it, of that genus. 
Specimens were obtained by the Challenger expedition at 
depths varying from 390 to 1900 fathoms. 
Famity BELLEROPHONTID 2A, 
Shell globular, nautiliform, symmetrically convoluted ;_per- 
iphery carinated or sulcated, ending ina slit of the middle portion 
of the outer lip. 
A large group of palzozoic fossils, the natural relations of 
which are very doubtful. They have been placed with the Cepha- 
lopoda, Bullidee, Pteropoda, etc., but the slit shell appears to 
indicate closer affinities with the Pleurotomariide, and the best 
modern systematists place them in the vicinity of that family. 
BELLEROPHON, Montfort, 1808. 
Syn.—Microceras, Hall. 
Distr.—150 sp. Cambrian to Carb.; North America, Europe, 
Australia, India. B. striatus, d’Arch. (1xxxii, 95). 
Shell symmetrically convoluted, globular, or discoidal, strong, 
few-whorled; whorls often sculptured ; dorsally keeled ; aperture 
sinuated and deeply notched on the dorsal side. 
Microceras, Hall, appears to be founded on the embryonic 
volutions of a Bellerophon. 
WARTHTA, Waagen, 1880. Smooth, globular, not umbilicated, 
without slit-band, and having a tolerably deep rounded sinuosity 
on the outer lip; inner lip only very slightly callous. Fossil. 
Salt Range, India. B.-brevisinuata, Waagen (1xxxii, 96, 97). 
MoGuLIA, Waagen, 1880. Globular, without well-developed: 
slit-band ; mouth oval, outer lip with a shallow angular emargi- 
nation, inner lip callous; no spiral sculpture. B. regularis, 
Waagen (Ixxxii, 98, 99). Carboniferous; India. Possibly — 
Warthia. 
PATELLOSTIUM, Waagen, 1880. Mouth very much expanded 
and the lips spread out patella-like, the inner lip not being cut 
out where it touches the preceding volution. Bell. macrostoma, 
Proem. Bell. megalostoma, Kichw. 
WAAGENTA, L. G. de Koninck, 1882. Shell subglobular, usually 
a little higher than wide, and slightly compressed on the sides ; 
whorls completely embracing, leaving no trace of umbilical 
opening, that region being covered with a callus which appears 
to have been deposited by a special organ, of which the related 
genera are deprived; slit-band narrow,a little inflated; surface 
covered with small imbricated plications or tine lines of growth, 
and showing a pattern of coloring. Distinguished from Bellero- 
phon by the umbilical eallus. Distr.—3 sp. Carboniferous ; 
Europe. W. Ferussaci, d’Orb. 
