Mr. H. S. Wintle on an extensive Landslip at Glcnorchy. 393 



floras. He dissented altogether from Dr. Heer's identification of 

 these plants with those of the Chemung group, or with those of the 

 Middle Devonian of New Brunswick. 



3. " Further Notes on Eocene Crustacea from Portsmouth." By 

 Henry Woodward, Esq., E.G.S. 



In this paper, after referring to his former communication on 

 Crustacea from the Lower Eocene deposits at Portsmouth (Q. J. G. S. 

 vol. xxviii. p. 90), the author gave a full description of Rhach.io- 

 soma bispinosa, one of the new species described in it, the materials 

 being furnished by several fresh specimens, which show the whole 

 structure of the animal. The new points include the description of 

 the limbs, the anterior border of the carapace, the lower surface of 

 the body in both sexes, and the maxillipeds. 



The author also characterized, under the name of Litoricola, a 

 new genus of Shore-crabs allied to Grapsus, from the same de- 

 posits. Of this genus he described two new species. L. glabra and 

 L. dentata. 



4. " On a new Trilobite from the Cape of Good Hope." By 

 Henry Woodward, Esq., F.G.S. 



The Trilobite described in this paper is from the Cock's-comb 

 Mountains at the Cape of Good Hope, and was preserved in a no- 

 dule, the impression retained in which, when broken, furnished the 

 most instructive details as to its structure. Each of the eleven tho- 

 racic segments was furnished with a long median dorsal spine, 

 giving to the profile of the animal a crested appearance ; on each 

 side of this the axis of the segment bears two or three tubercles, and 

 the ridge of the pleura four or five tubercles. The tail is terminated 

 by a spine more than half an inch in length ; and all the spines are 

 annulated. For this Trilobite the author proposed the name of 

 Encrinurus crista -galli, although with some doubt as to the genus, 

 the head being only imperfectly preserved. 



5. "On an extensive Landslip at Glenorchy, Tasmania." By 

 S. H. Wintle, Esq. 



In this paper the author described the effects of an extensive 

 landslip from the northern face of Mount Wellington, in Glenorchy, 

 about 5 miles from Hobart Town. It took place during the night 

 of the 4th June, 1872, after a rainfall of A\ inches in twenty-four 

 hours. The debris descended nearly 2000 feet, into the bed of the 

 rivulet of Glenorchy. By the force of the accompanying torrent 

 great quantities of huge trees, some of them 200 feet long, were piled 

 up in vast heaps, mixed with boulders, agricultural implements, 

 fences, and other objects. The trees were deprived of bark, branches, 

 and roots. The Carboniferous limestone forming the bed of the 

 rivulet was exposed by the washing of the torrent for more than 

 two miles ; natural sections showed the blue shelly limestone alter- 

 nating with beds of mudstone and shales. At one part the author 

 found both banks of the rivulet lined with small, sharply angular 

 fragments of dioritic greenstone from the summit of the mountain ; 



