Cope.] ^14 [March 18, 



is not quite as long as the maxillary branch, and is on a superior plane, 

 being in close contact with its mate on tlie middle line, and forming with 

 the maxillary plate a half tube opening inwards. Pterygoids not very 

 wide, gradually narrowing to the posterior rod which is openly grooved 

 on the inner side. The basipterygoid processes overlap the entire width 

 of the internal face. Ectopterygoid reaching maxillary and jugal, but 

 not palatine ; little deflected posteriorly. Presphenoid not ossified ; 

 sphenoid distinguished from basioccipital by suture. Latter with subconic 

 descending lateral processes, which enclose a deep fossa on the external side. 

 Postoptic small, simple, crescentic. Petrosal extended well in advance 

 of semicircular canal above ; subforaniinal portion still more produced 

 bounding a down-looking open groove. Parietal sending downwards a 

 rather elongate process in front of petrosal. Epipterygoid originating 

 opposite basipterygoid below, and resting above on the descending pro- 

 cess of the parietal and the anterior margin of the petrosal. Occipital 

 condyle tripartite. 



Meckel's cartilage exposed trorn the anteriorly placed splenial foramen. 

 Corouoid a little produced auteriorly on external face of ramus, not at all 

 posteriorly. Suraugular and articular distinct ; angle flat, rounded, not 

 produced or angular inwards. Dentary produced as far posteriorly as 

 -coronoid ; splenial rather elongate (forming the inferior border of Meckel's 

 groove in E. ohwletus). 



In the hyoid system, E. fmciatus presents a short second cerato- 

 branchial. The first ceratobranchial has a cartilaginous terminal seg- 

 ment, as has also the ceratohyal. The latter is of moderate length, is 

 without expansions, and is articulated with the extremity of the rather 

 short hypobranchial. Tiiere is a large free epibranchial, which com- 

 mences near the free extremity of the second ceratobranchial, and curv- 

 ing backwards, outwards and then forwards, terminates nearly opposite 

 the middle of the ceratohyal. 



The cervical intercentra in the E. obsoleias number four, and those of 

 the E. fasciatus three, posterior to that of the atlas. There is no zygos- 

 phen. The caudal diapophyses are well developed at the base of the 

 series, and are split lengthwise at the middle and distal part of the series 

 by the segmentation of the vertebrae. Neural spine single at posterior 

 extremity of neural arch. 



The suprascapula is expanded auteroposteriorly, and the scapula is 

 rather elongate. The latter has no proscapula, while tlie coronoid has 

 one emargination. The sternum has a smill fontanelle posteriorly 

 placed. There are three costal articulations and a xiphoid rod witu two 

 ribs. The latter is in close apposition to its mate, and is exp.mded out- 

 wards at the junction of the first hajmapophysis. 



The ilium has no angiclus cristm, and the acetabulum is entire. The 

 pubes converge at a subacute angle, and thg small pectineal process is 

 nearer the proximal extremity, and is turned downwards. The ischia are 

 subtransverse, and present a wide em.wgination posteriorly, since the 

 processus tuberosus is near the acetabulum. 



