94 Mr. A. S. Woodward on the 
tion to the orifice, so that the inner throat of the shell at some 
little distance down appears almost closed. 
Three specimens, of which two are in good condition. 
We take this opportunity of correcting two errors that have 
appeared. In our paper in Ann. & Mag. Nat. Hist. for Sept. 
1891 the dimensions of Cyclostoma transvaalense should have 
been long. 12, lat. 114 mill. In the same paper it will be 
noticed that there is a discrepancy between the number of 
teeth in Vertigo thaumasta as stated in the Latin and the 
English text. The former is correct, for it will be seen on 
reference to the plate that the shell has three teeth. 
EXPLANATION OF THE PLATES. 
Puate IV. 
Fig. 1. Helix viridescens t. Fig. 7. Helix lygea. 
Fig. 2 rhysodes. Fig. 8. hypochlora. 
Fig. 3. epetrima. Fig. 9. —— trichosteiroma. 
Fig. 4. —— Crawfordi *. Fig. 10. —— gypsinat. 
Fig. 5. —— pretoriensis*, siganlsl. porphyrostoma F. 
Fig. 6 hottentota T. Fg. 12. namaquensis t. 
PuateE V. 
Fig. 1. Helix liricostata +. Fig. 8. Vitrina cingulata *. 
Fig. 2. dioryx. Fig. 9. zonamydra *, 
Fig. 3. erateina. Fig. 10. Buliminus quisqualis. 
Fug. 4. bathyceele. Fig. 11. Layard, 
Fug. 5. tuguriolum. Fig. 12. lamoensis. 
Fig. 6. Cyclostoma transvaalense t+. | Fig. 13. Pupa elizabethensis. 
Fig. 7. Pisidiwn Langleyanum +. 
Pate VI. 
Fig. 1. Cionella ovampoensis. Fig. 7. Vertigo thaumasta +. 
Fig. 2. Stenogyra cacuminata. Fig. 8. Ennea scrobiculata, 
Fig. 8. —— Chapmani. Fig. 9. Bowkere. 
1g. 4. Ennea thelodonta. Fig. 10 aperostoma. 
Fig. 5 muta, Fig. 11. Pupa ovampoensis. 
Fig. 6. dolichoskia. Fxg. 12. Ennea Marie. 
* Described in the ‘ Annals’ for Dec. 1890. 
+ Ditto for Sept. 1891. 
XV.—On the Skeleton of a Chimeroid Fish (Ischyodus) 
from the Oaford Clay of Christian Malford, Wiltshire. 
By A. SmiruH Woopwarp, F.G.S. 
OF the later Jurassic Chimeroid fishes several skeletons have 
been discovered in a good state of preservation in the Bava- 
rian Lithographic Stone (Lower Kimmeridgian)*. In 
* Ischyodus avitus: Chimera (Ganodus) avita, H. von Meyer, Paleon- 
togr. vol. x. (1862), p. 87, pl. xii—_Ischyodus Quenstedti, A, Wagner, Abh. 
