164 Oeological Society. 



Geological Society. 



November 3rd, 1875. — John Evans, Esq., F.R.S., President, 

 in the Chair. 



" On some new Macrurous Crustacea from the Kimmeridge 

 Clay of the Sub-Wealden boring, Sussex, and from Boulogue-sur- 

 Mer." By Henry Woodward, Esq., F.R.S., E.G.S. 



The first species described by the author belonged to the fossorial 

 family Thalassinidae, six species of which, belonging to four genera, 

 are now found on tlie British coasts. The known fossil species are 

 from the Chalk of Maestricht, the Greensand of Bohemia and Silesia, 

 the Chalk of Bohemia, the Greensand of Colin Glen, near Belfast, 

 and the Upper Marine Series of Hempstead, Isle of Wight. All these 

 are referred to the genus CalUcmassa, which also includes the species 

 from the Kimmeridge Clay described in this paper. The fossil is seen 

 in profile on several sections of the core, and has the enlarged hands 

 of the fore limbs more nearly equal in size than in the living species 

 of Callianassa ; the carapace and segments of the abdomen are smooth ; 

 and the latter are somewhat quadrate in profile, contracted at each 

 extremity, and not pointed ; and the caudal plates are oval. For 

 this Crustacean the author proposes the name of Callianassa isocJiela. 



The second species described belongs to the genus Mecochirus, 

 distinguished by the great length of the fore limbs, which is equal 

 to that of the whole body, the oldest known species of which (ilf. 

 olifex, Quenst.) is from the Lower Lias of Wiirttemberg. It was 

 obtained, together with Lingula ovalis, from the Kimmeridge Clay 

 of Boulogne, by Mr. J. E. H. Peyton, after whom the author pro- 

 poses to name it M. Peytoni. In this species the fore legs are very 

 finely punctate, and measure 75 millims. in length. The rostrum is 

 somewhat produced; and the carapace, which is finely gi'anulated, 

 measures 30 miUims. in length. The antenna? are long and slender. 

 The abdomen measures 45 millims. ; and the epimeral borders of the 

 segments are falcate. The species is intermediate in size between 

 M. socialis, Mey., and M. Pearcei, M'^Coy, which the author regards 

 as distinct. He also refers to M. Peytoni a pair of fore limbs ob- 

 tained from the Sub-Wealden boring. 



" On a new Fossil Crab from the Tertiary of New Zealand." 

 By Henry W^oodward, Esq., F.R.S., F.G.S. 



In this paper the author described a crab obtained by Dr. Hector, 

 F.R.S., Director of the Geological Survey of New Zealand, from 

 the " Passage-beds " of the Ototara series in Woodpecker Bay, 

 Brighton, on the west coast of the south island of New Zealand. 

 The new species belongs to the genus Harpactocarcinus, A. Milne- 

 Edw., which includes six species from the Eocene of Southern 

 Europe. Its nearest ally is N. quadrilohatus, Desmar. ; but its 



