134 DINOSAURIA. 



usually open and articulating by two facets. Distal extremity of 

 scapula much expanded ; humerus relatively wide and stout ; ischium 

 (fig. 21) directed backwards, with middle of acetabular portion placed 

 considerably above axis of shaft, and latter slender and without 

 distal expansion 1 . 



Equivalent to the Morosauridce of Marsh 2 . The apparent close 

 relationship of Morosaurus and Cetiosaurus has been noticed by the 

 writer in the ' Quart. Journ. Geol. Soc' vol. xliv. p. 58. 



Genus TITANOSAURUS, Lydekker 3 . 



This genus is provisionally included in the present family on 

 account of its open chevron-bones which articulate with the vertebrae 

 by two facets. 



Postmedian caudal vertebras (fig. 22) procoelous ; femur appa- 

 rently like that of Cetiosaurus. It has been suggested that this 

 genus might be identical with Ornithojpsis, but the resemblance of 

 the type species of the latter to Brontosaurus (in which the caudals 

 are amphicoelous) forbids this view ; the procoelous character of the 

 caudals has been regarded as indicating a distinct family, but this 

 docs not appear a necessary conclusion. 



Titanosaurus indicus, Lydekker 4 . 



The type species; of gigantic size. Centra of posterior caudal 

 vertebrae much compressed laterally, and facets for chevrons 

 strongly marked. Length of femur about 1,587 (55 inches). 



Hob. India. 



40867. Cast of a postmedian caudal vertebra. The original, which 

 is the type, was obtained from the Lameta beds (probably 

 Middle Cretaceous = Upper Greensand) near Jabalpur, 

 India ; and is preserved in the Indian Museum, Calcutta. 

 It is figured and described in ' Falconer's Palaeontological 

 Memoirs,' vol. i. p. 418, pi. xxxiv. figs. 3-5, without name ; 



1 In the pelvis of Cetiosaurus figured in Phillips's ' Geology of Oxford,' p. 277, 

 the positions of the pubis and ischium are reversed from their natural one, their 

 iliac surfaces being placed in apposition, and the proper adjacent surfaces made 

 the iliac ones. If the pubis in its correct position be compared with that of 

 Morosaurus (fig. 21), it will be seen that the contour of the two is almost iden- 

 tical ; the distal expansion in Phillips's figure is incorrect. 



2 l'leurocalus, Marsh, Amer. Journ. ser. '6, vol. xxxv. p. 00 (1888), apparently 

 belongs to the tame family. 



3 Kec. Geol. Surv. Ind. vol. x. p. 38 (1877). ! Loo. cit. 



