m 



pine is deft longkudinally in the lmt four cervical vertebra*, M if the coalescence of 

 the neurapophysea, whirh complete at their basal part, had heen arrested at thrir apices. 

 Besides the neural and vertebral canals, and the pneumatic foramina, there are also two other 

 foramina in most of the cervical rertebne on each tide of the neural arrh, formed by the ex- 

 UMioa of a process of a bridge of bone from that arch forward* and outwards to the diapo- 

 physis. The under surfaces of the axis and third vrrtebrte are carinate : the neurapophyses 

 of the. axis meet superiorly, but do not coalesce. The anchylosed plrura|>ophyses commence 

 at the axis, gradually iiicreaie in length to the tenth vertebra, and beyond this abo in breadth. 

 Letters corresponding to the TABLK or VKRTKBRAL ELEMKNTS are placed upon the tenth 

 usjiiual Tertebra and on the fifth dorsal vertebra. The sternum a oblong, keel-less but con- 

 vex brlow, with an entire rounded posterior margin ; it presents a deep but narrow excavation 

 at the middle of its anterior margin, and two wide and shallow coracoid groove* on each side ; 

 the angles of this margin are developed into short obtuse costal processes. There are four 

 articular surfaces for as many sternal ribs at the anterior half of each lateral margin ; these 

 surfaces are divided by deep excavations in that margin. 



The cranium is remarkable for the thick lofty crest developed from the whole of the upper 

 i of the frontal and nasal bones ; the horny covering is left upon the right half of this 

 The parocripital processes are broad and rounded ; the mastoida are more slender and 

 pointed, and extend along the outer part of the tympanics to near their articulation with the 

 squamoamla. The basiouipital descends a little way below the level of the articular tubercle . 

 the basupbenoid sends oat two rough cellular tympanic processes, and two smooth columnar 

 pterapophyses which abut against the true pterygoid bones. The presphcnoid forms Un- 

 usual elongated rostrum, which sends a median plate upwards to join the coalesced inferior 

 borders of the orbitosphrnoids : the prefrontals have coalesced with each other and with the 

 frontals and nasals superiorly ; they consist principally of the median vertical plate answer- 

 ill to the ' lamina perpendicularis etlimuidra* ' of Anthropotomy, but send out two lateral 

 plates answering to the ' partes plans: cthmoidese,' which coalesce with the lacrymaU and 

 form the anterior boundary of the orbit. A portion of these plates, which are very thin, is 

 slightly folded and, as it were, pressed forwards into the upper and back part of the nasal 

 mesitns, from the surface towards which they send off short sinuous lamella:, and represent 

 the parts of the human ethmoid called ' ossa turbinalia superiors.' The postfrontals are well- 

 devetoped, and divided from the rest of the superorbiul border by a deep notch ; some traces 

 remain of the suture between the malar and maxillary. The external bony nostrils form a 

 long common hiatus between the palatine and nasal processes of the premaxillary. The 

 sutures dividing the articular, dentary, and splenial pieces' of the mandible remain. The 

 sclerotic plates, thirteen in number, are preserved on the right aide ; they overlap each other 

 very extensively. The parts of the hyoidean arch preserved are the two thrrohyals. 



There are 9 caudal vcrtcbne, of which the last three are anchylosed ; they have a deep 

 perforation on each side, between the centrum and neural arch. The scapula and coracoid 

 have coalesced ; a short clavicular process extends inwards from the scapula, but without 

 meeting its fellow or touching the sternum. With the exception of the coalescence of the 

 coracoid, the condition of this part is closely similar to that in the Crocodile. The expanded 

 bead of the humerus presents two excavations externally ; it has a well-marked pectoral ridge : 



III 



