EHAMPHOEHTNCHID^]. 6 i 



Soc), pt. i. pi. i. fig. 19, under the name of Pterodactylus 

 aclandi, of which it is the type. Length (exclusive of 

 proximal projection) 0,145. Purchased, 1866. 



40126 k. A second or third phalangeal of the homologous digit. 

 Length 0,210. Same history. 



40128 1. An imperfect corresponding bone. Same history. 



40126 m. A terminal phalangeal of the ulnar digit of the manus. 

 Length 0,186. Same history. 



40126 n. A similar bone. Same history. 



40126 0. The proximal portion of a similar bone. Same history. 



Genus DIMORPHODON, Owen \ 



Jaws toothed to their extremities ; anterior teeth in both jaws 

 large, but posterior mandibular ones very small ; nares large, and 

 separated .by a narrow bar from preorbital vacuity ; coracoid aud 

 scapula united ; proximal tarsals united to tibia ; five digits in pes. 

 According to Owen's restoration 2 , the pubis and ischium form an 

 expanded sheet of bone at right angles to the narrow ilium, which is 

 extended to an equal length on either side of the acetabulum. 



Dimorphodon macronyx (Buckland 3 ). 



Syn. Pterodactylus macronyx, Buckland 4 . 

 (?) Pterodactylus marderi, Owen 5 . 



The type species. Length of the cranium usually about 0,220. 

 Orniihocephalus banthensis, Theodori 6 (Dimorjoliodon banthensis, 

 Owen 7 ), was identified with it by Meyer ; but the anterior extre- 

 mity of the jaws is edentulous, as in Rhamphocephalus, and the 

 species is the type of Dorygnathus, Wagner 8 . The specimen on 

 which P. marderi is founded does not appear to be specifically 

 distinct from the present form. 



Hob. Europe (England). 



1 Eep. Brit. Assoc, for 1858, Transaction of Sections, p. 97 (1859). 



2 Liassic Reptilia (Mon, Pal. Soc), pi. xx. Zittel ('Palseontographica,' 

 vol. xxix. p. 64) doubts the correctness of this restoration. 



3 Proc. Geol. Soc. vol. i. p. 127 (l§2§).— Pterodactylus. 



4 Log. cit. 



5 Mesozoic Reptilia (Mon. Pal. Soc), pt. i. p. 12 (1874). 



6 Notiz. Nat. Heilk. vol. xxix. p. 103 (1830).— This name has the priority. 



7 Palaeontology, 2nd edit. p. 275 (1861). 



8 Sitz. k.-bay. Ak. Wiss. 1861, p. 520. 



