f*PE€IMEXS FKOM LOWEK LLVS A2»D IX>WEK OOLITE OF E:!CGLA2^r» 455 



floef? liot exhibit any hooklike thickening. The iachium differs from that 

 of M egdl.omuruii hucklandi in having a rather straight shaft. The fenrnr 

 is less curved and the distal end is broader than in Megal.omurm huck- 

 landi. The tibia has a well developed crista lateralis near its proximal 

 extremity. The fibula is very slender. The form of the processus 

 ascendens astragali resembles that of ^legcdomurus poikilopUurfyn. The 

 metatarsals and phalanges are much more slender than those of J/, huck- 

 landi. Although it is possible that a fifth toe once existed, there is now 

 no indication of it. It is doubtful whether it is necessary to distinguish 

 this species from the true Megdlosaunis by a separate name (Strepto- 

 spondylus) . The reasons for doing so would be the deeper pleuroecelous 

 cavities and the slendemess and certain minor characters of the skull. 



Another MegdlomuruH from the Oxford clay of Weymouth (Dorset- 

 shire) in the Parker collection I call 3/. parkeri. This specimen is char- 

 acterized by high dorsal spines, an ilium differing in form from that of 

 3/. hucklandi, a very narrow pubis with large obturator foramen and a 

 thick, hooked distal end, an ischium with lateral longitudinal ridge near 

 the articular face, and a tibia whose cnemial crest projects greatly for- 

 ward. This species differs more from the true Megalosaurus than does 

 3/. cuvieri, only in another direction. 



Specime:n' feom FiLixCE 



Of "Megalosatiru^* insignis (De Longchamps), from the Kimmeridge 

 of France, not much is known except large Megalosaurus-hke teeth and 

 stout phalanges. 



The species described as 3/. dunkeri by Lydekker (Dames), from the 

 English (and German) Lower Wealden, is distinguished from Megalo- 

 saurus by its enormously high neural spines in the dorsal region. I 

 therefore propose to establish a new genus, AUispinaz, for it. M. oweni 

 (Lydekker), from the British Upper Wealden, belongs to the same genus. 

 This genus apparently develops from Megahsaurus parkeri. 



It is shown, therefore, that the true genus 3IegaIosaurus occurs only 

 in the Middle and Upper Dogger and lowest Malm. The earlier and 

 later forms, although diifering somewhat, are allied with it. 



Quite a different form is that described by Sauvage as Megalosaurus 

 superhus, which I call Erectopus (n. gen.) superhus, from the Middle 

 Cretaceous of northern France. The relationships of this genus are not 

 yet evident. It is characterized by the peculiar form of the femur. The 

 proximal end above the trochanter major is greatly curved medially and 

 the fibular condyle at the distal end is considerably more developed than 



