August 25, 1898] 



NATURE 



393 



tribution, at prices varying betw een ten dollars and thirty 

 dollars each ; they represent : — 



Fig. \^ Agathawnus {Triceraiops) sphenocertis (Cope), 

 a large heavily armed herbivor- 

 ous Dinosaur from the Laramie 

 Upper Cretaceous of Western 

 America ; the length of the 

 animal being about 25 feet. 



Fig. 2, Hadrosattnis mtrabilis 

 (Leidy), a huge Dinosaur 38 

 feet in length, -.vith a head like 

 an Ornithorhynchus, with small 

 fore-limbs and heavy hind-limbs 

 and tail. Like Triceratops it 

 was found in the Laramie Cre- 

 taceous beds. Hadrosaurus 

 was probably of amphibious 

 habits, feeding on soft water- 

 plants or small mud-loving 

 organisms. Its body was 

 covered with a thick rhinoceros- 

 like hide, parts of which were 

 found preserved with the skele- 

 ton in Prof Cope's specimen. 



Fig. 3, Megalosaurits ? {Lcr- 

 laps^ Dryptosaurus), aqiiil- 

 unguis (Cope). A carnivorous 

 type of Dinosaur, about 15 feet 

 in length, 8 feet of which was 

 represented by its tail; light and 

 agile in form, and armed with 

 powerful teeth and claws. The 

 disproportionately long hind- 

 limbs and heavy tail remind 

 one of the kangaroo, which it 

 may also have resembled in its 

 mode of progression, by leaps 

 instead of walking or running. 

 It probably used its powerful 

 hind feet armed with heavy 

 claws in attacking its enemies. 

 The jumping powers, as repre- 

 sented in the model of two 

 fighting Lcslaps, was suggested 

 by Prof Cope. Lalaps was 

 first described by Cope from 

 the Cretaceous beds of New 

 Jersey. The name {Lcelaps) 

 being preoccupied, Prof Marsh 

 substituted that of Drypto- 

 saiirus ; but in order to avoid 

 the use of this name, it is here 

 suggested to place it in Buck- 

 land's genus Megalosaurus ! 



Fig. 4, Nanosaurus claviger 

 (Cope) is from the Permian 

 beds of Texas, and is a highly- 

 specialised form belonging to 

 the primitive reptilian order 

 Pelycosauria of Cope, and to 

 the sub-order Rhynchocep/talta, 

 " beak-headed " reptiles. As to 

 the precise object of the ex- 

 traordinary rigid fin-like crest 

 upon the back, it is not easy 

 to conjecture. Prof Cope 

 humorously suggested that it 

 might have been used as a sail. 

 .\gain, it might have asisted 

 the creature in swimming, or 

 was perhaps only ornamental. 

 It was supported upon enormously elongated ladder-like 

 processes of the dorsal vertebni?, a structure probably 

 unique amongst the Reptiliaor even amongst Vertebrates. 

 NO. 1504. VOL. 58] 



The last model is that of Cervalces americanus, a 

 Pleistocene form of the American elk, which was of 

 the same size and proportions as the living moose, but 



had horns almost as large as those of the extinct gigantic 

 Iri^h deer, expanded in three planes of growth nearly 

 at riglit angles to each other. The model is based upon 



