Reports & Proceedings — Zoological Society of London. 335 



of the altered limestone or ' calc-fiinta ' of Down-town, however, the 

 type of alteration is entirely different, and leads to the inference that 

 the heds are quite distinct. The change is of much more than local 

 significance, as from this point all round the north of the moor, at 

 least as far as South Zeal, there is no bed of any thickness containing 

 cordierite, while chiastolite, white mica, and andalusite proper are 

 characteristic. Coarse andalusite rock and altered shale, with remark- 

 able skeleton crystals of chiastolite, are described from the Nodden 

 quarries, together with other types of hornfels. It is clear that the 

 beds occupying the northern part of the contact-zone belong to 

 a definite series. There is strong evidence that the cover of the 

 granite mass has a dome-like character, and that precisely the same 

 stratigraphical horizon is in immediate contact with the granite all 

 the way from Sourton to Drewsteignton. 



The granite of Brator, not far from the best exposures of coarse 

 cordierite-hornfels, is described. It is a biotite-bearing rock con- 

 taining a little microcline, as well as orthoclase and oligoclase. It 

 is rich in cordierite, recrystallized from sedimentary material absorbed 

 into the magma. Several offshoots from the granite have been noted 

 at various points along the Lyd. One near Nodden Gate is of 

 interest, as containing topaz in remarkable abundance. 



II. — Zoological Society of London. 



1. April 13, 1915.— E. T. Newton, Esq., F.B.S., in the Chair. 



Dr. A. Smith Woodward, F.R.S., F.Z.S., exhibited an anterior 

 horn of a woolly rhinoceros {Rhinoceros antiquitatis), obtained for 

 the British Museum, from frozen earth in Northern Siberia, by 

 Mr. Bassett Digby. The horn must have measured originally nearly 

 a metre along the curve of the anterior border. It has been cut and 

 trimmed in places by the finders, but is sufficiently well preserved to 

 show its laterally compressed shape and sharp posterior border. 



Dr. Bobert Broom, D.Sc, C.M.Z.S., read a paper on some new 

 Carnivorous Therapsids in the Collection of the British Museum. 

 Most of the specimens described have been for many years in the 

 collection, but owing to their small size and imperfect condition 

 they have not hitherto been recognized as new. Five species, 

 belonging to four new genera, are Therocephalians. Two species, 

 one of which belongs to a new genus, are Gorgonopsians, and one is 

 a new species of a previously known Cynodont genus. 



2. May 11, 1915.— Dr. A. Smith Woodward, F.B.S., Y.P., in the Chair. 



Dr. B. Broom, M.D., C.M.Z.S., read a paper on the Anomodont 

 genera, Pristerodon and Tropidostoma. 



Pristerodon, described by Huxley in 1868., is a very near ally of 

 Dicynodon, differing mainly in having a series of molars which are 

 smooth in front and have a series of denticulations behind. The 

 males are tusked, the females without tusks. Oudenodon raniceps of 

 Owen is a species of Pristerodon ; while Opisthoctenodon agilis, Broom, 

 and probably also Opisthoctenodon hrachyops, Broom, are other species 

 of Pristerodon. 



In 1889 Seeley described two occiputs under the name Picynodon 



