Geological Society. 495 



about one half to marginal; third discoidal indistinct ; legs 

 entirely yellow except a brown stripe on the posterior tibia 

 and tarsus ; abdomen yellow, with five broad entire dark 

 brown bands, or the fifth subobsolete, and the base of the first 

 segment dark ; venter entirely yellow. Claws cleft. Tips of 

 mandibles bright rufous. 



Hab. S. Jose" de Guaymas, Mexico, April 10, 1898 (L. 0. 

 Howard). 



Named after Dr. Howard's little daughter. This in my 

 tables comes near to P. Martini, but is easily distinguished by 

 the yellow sides of the thorax and the brown nervures. Seven 

 specimens. There are sometimes two yellow spots on the 

 anterior half of the mesothorax. 



Dr. Howard also collected at S. Jose' de Guaymas, on the 

 same day, examples of P. tarda, Ckll., var. P. salicis, Ckil. 

 (1 J ) , P. punctosignata, Ckll., and P. exclamans, Ckll. ( $ <j> ) . 

 He informs me that most, if not all, of the specimens of 

 Perdita from that locality were taken at the flowers of 

 mesquite (Prosopis giandulosa) . 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 

 April 26th, 1899.— W. Whitaker, B.A., F.R.S., 

 President, in the Chair. 

 The following communication was read: — 



' On three Species of Lamellibranchs from the Carboniferous 

 Rocks of Great Britain.' By Wheelton Hind, M.D., B.S., F.R C S 

 F.G.S. 



The first part of this paper describes a new species of Anthra- 

 comya which occurs in the North Staffordshire and Manchester Coal- 

 fields at horizons higher than that characterized by A. Phillipsi. 

 The fossil is found at Etruria, Bradwell, Stoke-on-Trent, and 

 Fallowfield. It appears to indicate a special zone of shales and 

 JSjpirorhis-Mmesto-ne about 300 feet below the Penkhull Sandstone, 

 and to be the only molluscan form knowu from the zone. 



A new species of Carbonicola is next described, partly from 

 specimens previously supposed to be a gasteropod, a brachiopod, or 

 even a crustacean, and partly from better-preserved specimens 

 obtained from calcareous bands about 10 yards above the Bassey 

 Mine Ironstone in North Staffordshire. It appears to be the latest 

 species of this genus known, and to occur in higher beds than any 

 other species. 



Lastly, a new species of Ctenodonta from Penton Linns (Dumfries- 

 shire) is described. It occurs in a marine shale below the highest 

 limestone of the locality, in beds referred to the horizon of the 

 Hurlet Limestone by the officers of the Geological Survey. The bed 

 contains gasteropoda, crinoids, cephalopods, etc., with Productus 

 giganleus. The species has some resemblance to C. Balli, Barrois, 

 found in Spain. 



