Geological Society. 6j 



lique truncatis, seu abrupte sectis. Femora sub-incrassata et 

 parum compressa; tibiis subincurvis. 



CoPTOPTERus CRETIFER. Cojjt. Jusco-brunncuSf capite alhida 

 fnacula inter oculos pos'ita. Thorax nigro-cinereus variis ma- 

 cults cretaceis notatus. Elytra brunnea macuUs nigris aspersa, 

 in quibusdam speciminibus maculce conjunctce fascias exJiibent. 

 Corpus infra fusco-rubrum maculisque variis albidis obsitum. 

 Pedes rubro-picei et tomeniosi. 

 Long. lin. lOJ; lat. lin. 3. 



This insect appears to be abundant at Sydney : there are also 

 other aUied species undescribed, and from the vicinity of the Swan 

 River. 



Genus Piesarthrius, Hope. 



Type of the Genus Stenochorus marginellus. 

 Vide Zool. Trans., p. 112. Genus 12. 



C«pw^ exsertum. ^w^eww<:e valde compressae, 1 l-articulatse. Thorax 

 fere tetragonus angulis anticis parum rotundatis. Elytra tho- 

 race paullo latiora parallela, interne spinosa, angulis externis 

 rotundatis. Femora antica quatuor vix incrassata, posteriora 

 minora ; tibiis subincurvis. 



Hab, In Nova Hollandia. 



Piesarthrius marginellus. Piesar. Jlavo-fuscus antennis com- 

 pressis, tomentosis et pallidis. Thorax niger^ lateribus Jlavo- 

 ochraceis. Scutellum disiinctum etjlavum. Elytra testaceo-Jlava 

 marginibus interne et exlerne rubro-piceis. Corpus infra brunneo- 

 piceum lateribus pectoris annulisque abdominis utrinque flavo' 

 maculatiSf pedibus pallidioribus. 

 Long. lin. 10 ; lat. lin. 2 J. 



This insect I received from Captain Roe of the Swan River, and 

 it is, I believe, unique in our London cabinets. I have seen a second 

 species, but have not been able to obtain permission to describe it. 



GEOLOGICAL SOCIETY. 



April 29, 1840. — A paper was read, entitled, "Description of the 

 mains of a Bird, Tortoise, and Lacertian Saurian, from the chalk ;" 

 by Richard Owen, Esq., F.G.S. 



Sird. — The three portions of Ornitholite were obtained by Lord 

 Enniskillen from the chalk near Maidstone, and were recognised by 

 him and Dr. Buckland as belonging to some large bird. One of 

 the bones is nine inches in length, and has one extremity nearly en- 

 tire, though mutilated, but the other is completely broken off. The 

 extremity, partially preserved, is expanded. The rest of the shaft 

 of the bone has a pretty uniform size, but is irregularly three-sided, 

 with the sides flat and the angles rounded : its circumference is two 

 inches and a quarter. The whole bone is slightly bent. The spe- 

 cimen differs from the femur of any known bird, in the proportion 

 of its length to its breadth ; and from the tibia or metatarsal bone, 



F2 



