POATE, XV: 
All the figures on this Plate are from specimens from Lummaton in my Collection, 
except where otherwise stated. 
RHYNCHONELLA? ANISODONTA, Phillips, sp. (Page 132.) 
Fia. 
1. Dorsal view of a large specimen, with its valves slightly displaced. 14a, side 
view. 1b, front view. All enlarged. 
2. Portion of another specimen, much enlarged to show the finer ornament of 
the surface when well preserved, x 5. 
RHYNCHONELLA TRILOBOIDES, n. sp. (Page 128.) 
3. Dorsal view of a specimen, with broad low fold and dilated sides. 
N.B.—The matrix having been cleared from the specimen since drawing, the beak is found 
to be higher and narrower than here represented. 
RuyncHoneLia Neapouitana, n. sp. (Page 129.) 
4, Dorsal view of a specimen with steep angular ribs, which reach to the apex, 
and are largest on the fold, and which show some degree of irregularity, 
enlarged. 4a,side view. 46, front view. Newton. Allenlarged. Museum 
of Practical Geology. 
WILSONIA OMEGA, n. sp. (Page 135.) 
Or 
. Dorsal view of specimen of very rounded form, with ribs not reaching to the 
apex, and marginally bifurcated or grooved. 5a, side view, showing the 
large ventral valve and elevated (though defective) beak, as compared with 
W. cuboides. 5b, front view, showing the bifurcation or splitting of the 
ribs. Hnularged. 
WILSONIA CUBOIDES, Sowerby, sp. (Page 134.) 
6. Rear view of a very deep specimen enlarged. 6a, lateral view. 
CAMAROPHORIA ASCENDENS, Steininger, sp. (Page 136.) 
7. Dorsal view of a transverse specimen with eight ribs on the fold, enlarged, 
showing the rounded ribs which reach nearly to the apex. 7a, side view, 
with defective beak. 7 b, front view, showing eight ribs on the fold. 
8. Dorsal view of another specimen with shorter ribs, enlarged. 8a, lateral view, 
showing beak. 8b, front view, showing five ribs on the fold. 
9. Dorsal view of another specimen, witha defective beak, showing five ribs on the 
fold, enlarged. 9 a, lateral view. 9 b, front view, showing marginal 
thickening of ribs and a very deep fold. All enlarged. 
RHYNCHONELLA PARALLELEPIPEDA, Broun, sp. (Page 129.) 
10. Dorsal view of a fine specimen, with very elevated beak. 10a, lateral view. 
