266 Geological Society. 



articulation of the ribs are Saurischian, the capitular and tubercular 

 facets being vertical in the dorsal region, and not horizontal as in 

 Crocodiles. The humerus shows some characters in common with 

 that of StereorocMs dominans, in the epicondylar groove. In general 

 character the limb-bones are more Crocodilian than the axial skele- 

 tou. The interelavicle is described, and regarded as a family cha- 

 racteristic of the Belodontidse. 



In the 3rd part an account is given of Staffcmolepis, which is 

 regarded as showing a similar relation with the Megalosauria, to 

 that of Belodon with the Cetiosauria. This interpretation is based 

 chiefly upon the identification of the pubic bone in Staganolepis, which 

 has the proximal end notched as in Zanclodon and 8ireptof<j)on- 

 dtfhis ; and the inner ridge at the proximal end is developed into 

 an internal plate. A note follows on the pelvis of Aetosaurus, 

 which is also referred to the Saurischia on evidence of its pelvic 

 characters, approximating to the Cetiosaurian sub-order. 



Part 4 treats of Zanclodon, which is regarded as closely allied 

 to Massospondylus, Enslrlesaurus, and Streptospondijlus. It is 

 founded chiefly on specimens in the Koyal Museum at Stuttgart, 

 and in the University Museum at Tiibingen. The latter are regarded 

 as possibly referable to Teratosaurus, but are mentioned as Zanclodon 

 Qaenstedti. The pelvis is described and restored. Zanclodon has 

 the cervical vertebrae relatively long, as compared with Megalosaurus, 

 and small as compared with the dorsal vertebra}, which have the 

 same Teleosauroid mode of union with the neural arch as is seen 

 in Sh'ejitospondylus and Massospmidylus. The sternum, of Pleinin- 

 ger, is the right and left pubic bones ; but there is much the same 

 difference in the proximal articular ends of those bones in the fossils 

 at Stuttgart and Tiibingen, as distinguishes corresponding parts of 

 the pubes in Megalosaurus and Streptospondylus. The ilium is 

 more like that of Pcda^osawu^ and Dimodosaurus. The limb-bones 

 and digits are most like those of Dimodoaaurns, but the teeth re- 

 semble Pahvosaiirus, Etisl'elesaurns, Megalosaurus, and Streptospon- 

 dylus. 



Part 5 discusses Tliecodontosaurus and Palceosaurus upon evidence 

 from the Dolomitic Conglomerate in the Bristol Museum. An attempt 

 is made to separate the remains into those referable to Tliecodonto- 

 saurus and those belonging to Pcdccosaxirus. The latter is represented 

 by dorsal and caudal vertebrae, a scapular arch, humerus, ulna (?), 

 metacarpals, ilium, femur, tibia, fibula, metatarsals, and phalanges. 

 These portions of the skeleton are described. There is throughout 

 a strong resemblance to Zanclodon and other Triassic types. A new 

 type of ilium, and the humerus originally figured are referred to 

 Thecodontosaiirus. 



Part 6 gives an account of the South African genus Massospon- 

 dylus. It is based partly upon the collection from Beaucherf, in 

 the Museum of the Royal College of Surgeons, referred to 31. cari- 

 naiu^ ; and jjartly upon a collection from the Telle River, obtained 

 by Mr. Alfred Brown of Aliwal North, referred to M. Browni. The 

 former is represented by cervical, dorsal, sacral, and caudal vertebrse ; 



