Vol. 58.] JURASSIC OF THE SOUTH WALES DIRECT LINE. 741 
typical Fullers’-Earth form) and Rhynchonella sp. (described below) 
occur plentifully, at certain horizons. A Pecten of the vagans-group 
is not uncommon. . 
The following is a complete list of the fossils obtained from the 
Fullers’ Earth and Passage-Beds, arranged in descending order :— 
( Pholadomya deltoidea, Sow. 
| Ph. aff. Heraulti, Ag. 
Trigonia pullus (?) Sow. 
Avicula (Pseudomonotis) echinata, 
1 Sow. 
{ Cypricardia sp. 
Ammonites (Perisphinctes) gracilis, 
J. Buckm. 
Trichites sp. 
| Pecten aff. demissus, Phil. 
| Crustacean. 
( Ostrea acuminata, Sow. 
Avicula (Pseudomonotis ) echinata , 
Clays, shales, and marls, | oe oleh, Soca eae 
with a fairly constant | 1 : agans-group. 
: : socardia sp. 
middle series of ar- { Toe aaDe lobata, Sow 
gillaceous limestones | J @ 7 
if 
(10 feet). Rhynchonella varians, Schloth. 
| Lh. sp. 
| Waldheimia (Ornithella) ornitho- 
|  cephala, Sow.! 
PassaGe-Brps Hard sandy limestones, 
(45 feet). with subsidiary clays. 
Fuuiers Eartit 
(90 feet). 
Paleontological Notes. 
Waldheimia (Ornithella) ornithocephala is non-elongate in form. 
The straight central portion of the frontal margin is very short (4), 
compared with the width of the test. 
Rhynchonella sp.—This form has a very concinna-like aspect, 
the perforation not being closed below by the deltidial plates. 
Mr. Buckman considers it to be a new species, quite distinct from 
both Fh. concinna and Rh. obsoleta. Its mutations take place (1) in 
form, as shown by a tendency towards greater elongation, rarely 
towards greater transversity ; (2) in increased coarseness of ribbing. 
Ammonites (Perisphinctes) gracilis, J. Buckm.—Our specimens 
seem to agree with the figures given in the ‘ Great-Oolite Mollusca.’ 
The strongly marked ruts at intervals, the nature of the ribbing, 
and the open umbilicus, mark the species out as a close relative 
of Amm. (Perisphinctes) Martinsi, d’Orb.; but the flattened sides, 
straight ribs, and narrow rim make it worthy of a distinct name. 
Pecten of the vagans-group.—Form elongate; beak-angle less than 
90°. Right valve: four broad ribs, each bisected by a groove, 
separated one from the other by three broad valleys; valve convex. 
Left valve: ribs (about seven) unequally spaced, low, and cylindrical, 
crossed at unequal intervals by scaly annulations ; valve flat. 
‘ Several specimens found at Shaft No. 2 were kindly given to us by 
Mr. T. F. Sibly. 
