Geological Society. GiT 



lique tnincatis, seu abrujite sectis. Femora sub-incrassat;i ct 

 parum comjiressa ; tibiis subincurvis. 



CoPTOPTERUs CRETiFER. Copt. fusco-hrunncus, capite alhida 

 niacula inter oculus posita. Thorax n'tgru-cinereus variis mu- 

 cul'is cretaceis notatus. Elytra brunnea macuUs 7iigris aspersa, 

 in quibusdam spcciminibus macules conjiincla; fascias exhibent. 

 Corpus infra fusco-rubrum maculisque variis albidis obsitum. 

 Pedes rubro-picei et tomentosi. 

 Long. lin. IQi; lat. lin. 3. 



This insect appears to be abundant at Sj'dney : there are also 

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

 River. 



Genus Piesarthrius, Hope. 



Type of the Genus Stenochorus ^nargineUus, 

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



Caput exsertum. ^«fe««« valde compressse, 1 l-articulatae. 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 HoUandia, 



Piesarthrius marginellus. Piesar. Jlavo-fuscus antennis com- 

 prcssis, tomentosis et pallidis. Thorax niger, lateribus Jlavo- 

 ochraceis. Scutellum distinctum etfiavum. Elytra testaceo-flava 

 marginibits interne et externe rubro-piceis. Corpus infra bruvnco- 

 jnceum lateribus pectoris annulisque abdominis ulrinque flaxo- 

 maculatis, pedibus palUdioribus. 



Long. lin. 10; lat. lin, 2|^. 



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, ISiO. — 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. 



Bird. — The three portions of Ornitholite w^ere obtained by Lord 

 Enniskillen from the chalk near Maidstone, and were recognised hj 

 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, 



r2 



