146 Professor J. W. Gregory — Deep Bore at Seascale. 



(R. 4124). The pelvis and some ribs have been modelled from other 

 specimens. All the material employed was collected with his usual 

 skill and care by Mr. A. N. Leeds, F.G.S., from brick-pits in the 

 Oxford Clay in the neighbourhood of Peterborough, whence he also- 

 obtained the fine skeletons of Cryptocleidus and Peloneustes exhibited 

 in the same gallery. 



As usual when a skeleton is mounted in this way, it gives a very 

 different impression from that derived from the examination of the 

 separate bones, or even from the crushed specimens by which the 

 Ichthyosauria are usually represented. One of the most remarkable 

 features is the manner in which the long anterior "ribs, borne on the 

 vertebrae behind the axis, are crowded back, so as to pass within the 

 scapulae. That this arrangement actually occurred is shown in some 

 of the crushed Liassic specimens, especially in the remarkably well- 

 preserved examples from Holzmaden. There were about fifty pairs of 

 ribs in all. The caudal fin must have been very large, the deflected 

 "portion of the vertebral column running down in the ventral lobe 

 consisting of about fifty vertebrae ; it is possible that as mounted this 

 terminal portion of the vertebral column is bent down a little toe 

 sharply, the angle between it and the rest of the backbone being 

 rather more obtuse. 



The length of the skeleton as mounted is 13 ft. 6 in. (412 cm.), 

 of which the head occupies 3 ft. 2 in. (96-5 cm.). 



II. — A Deep Bore at Seascale in Cumberland. 

 By Professor J. W. Gregory, F.B.S., M.I.M.M., D.Se. 



DURING the years 1906 to 1909 a bore was sunk at Seascale on 

 the coast of Cumberland, 9 miles south-eastward from St. Bees, 

 in the hope of reaching a continuation of the Coal-measures which, 

 south of Whitehaven, end against the Trias. This bore reached the 

 depth of 3,200 feet, and it was then still in the Bed Sandstone 

 Series, which it entered beneath 20 feet of drift. Owing to the 

 kindness of Mr. Forster Brown, I received a copy of the bore section, 

 and from Mr. Fleming Smith, of Cleator Moor, manager of Vivian's 

 Boring and Exploration Company, Ltd., who carried out the boring, 

 further information regarding the bore, two samples of the core, and 

 a copy of the journal for the lowest 180 feet. As the bore record is 

 of especial geological interest, I am indebted to Mr. Forster Brown 

 for permission to publish it. 



Section of Borehole at Seascale. 



Surface . 



Sandstone 



Bed Shale 



Sandstone 



Bed Shale joints 



Sandstone . . 



Bed Shale joints 



Sandstone 



Bed Shale partings 



Sandstone 



Bed Shale joints 



