APPENDIX 



Art. XXII. — Restoration of Anehisaurus • by 

 O. C. Marsh. (With Plate YI.) 



The Triassic Dinosaurs now known from the Connecticut 

 river sandstone have been investigated by the writer, and some 

 of the results have already been placed on record in this 

 Journal.* Remains of five individuals have been discovered, 

 sufficiently well preserved to indicate the main characters of 

 the animals to which they pertained. These were all carnivo- 

 rous forms of moderate size, and the known remains are from 

 essentially the same geological horizon. Many larger forms, 

 probably herbivorous, are indicated by footprints, but no 

 characteristic portions of the skeleton have yet been found. 



The genus Anehisaurus, one of the oldest known members 

 of the Theropoda, is so well represented by parts of four 

 skeletons, two nearly complete, from these deposits, that a 

 restoration of one species can now be made with considerable 

 certainty. This has been attempted, and the result is given, 

 one-twelfth natural size, in the accompanying plate. The 

 animal when alive was about six feet in length. 



The skeleton chosen for this restoration is the type speci- 

 men of Anehisaurus colurics, already described by the writer. 

 This skeleton when discovered was entire, and apparently in 

 the position in which the animal died. Portions of the neck 

 and the tail vertebrae were unfortunately lost before the 

 importance of the specimen was realized, but the skull and 

 nearly all the rest of the skeleton were saved. From these 

 the matrix in great part has been removed, so that the more 

 important characters can be made out with certainty. The 

 parts missing are fortunately preserved in a smaller specimen 

 of an allied species (Anehisaurus solus) found at the same 

 locality, and these have been used to complete the outline of 

 the restoration. Portions of two other specimens, nearly 

 allied, and from the same horizon, were also available, and 

 furnished some suggestions of value. 



The restoration as shown on Plate YI. indicates that 

 Anehisaurus colurus was one of the most slender and delicate 

 dinosaurs yet discovered, being only surpassed in this respect 

 by some of the smaller bird-like forms of the Jurassic. The 



*This Journal, vol. xsxvii, p. 331, April, 1889: vol. xlii, p. 267, September, 

 1891; and vol. xliii, p. 543, June, 1892. 



