TOMISTOMA OAVIALOI DES. 
209 
ill (lotail by 'roiila and Kail * under tlie name Gamalomclius eggenhurgmsls, and placed 
by Lydekker f in the genus Tomistoma. This species also is intermediate in many 
r('sj)ects between Gharialis and Tomistoma. Some of the more important points in 
wliicli its skull differs from that here described arc ; (1) the roof of the skull is 
relatively narrower; (2) the borders of the orbits are raised ; (3) the temporal fossie are 
smaller. On the other hand, the resemblances are so considerable that if the genus 
GnvialosHchus were maintained the present species might be referred to it. 
Koken J has described, under the name TJioracosaurus macrorlijinchiis, the skull of a 
long-snouted Crocodile from the uppermost Cretaceous beds of Mount Aime, near 
Mpernay, a form originally figured by de Blainville § as Crocodilns macrorhyncltiis. He 
shows that it is intermediate in form between the skulls of Gharialis and Tomistoma, 
and it seems to resemble closely the species now under discussion. It is doubtful, 
however, whether Blainville’s Crocodllus macrorhynchus can properly be referred to 
Thoracosaurus, a genus originally founded by Leidy || for the reception of the species 
T. neoc€sariensis,de: Kay, sp.^, from the Upper Cretaceous of New Jersey, the skull of 
which differs in possessing antorbital vacuities (which, however, according to Koken, 
may be merely accidental breaks in the bone), a more massive skull, and relatively larger 
teeth. In any case it appears that the present species, Gavialosucims eggenhiirgensis, 
and Thoracosaarus macrorhynchus are all intermediate between Gharialis and Tomi- 
stoma., as now existing, and for the present the contact of the nasals with the premaxilhTe 
seems to incline the balance in favour of placing them in Tomistoma. 
C. 8948. Skull, wanting the posterior part of the palate and the tip of the snout. The type 
specimen described above and figured on PI. XXIIl. figs. 3, 3 a. All the teeth arc 
wanting. The dimensions (in centimetres) of this specimen are : — 
Length from cpiadrate articulation to snout 68 app. 
,, occipital condyle to snout 64 
„ anterior border of orbit to end of snout . . 46’5 app. 
Width between outer angles of quadrates 27 
,, of foramen magnum 2'5 
Greatest width of skull-roof 18 
,, „ superior temporal fossa 5'9 
Antero-posterior diameter of orbit 4-8 
AVTdth of interorbital bar 3‘4 
„ middle of rostrum 6 '4 
Extreme length of premaxillae 19'5 
R. 3329. Plaster cast of the above specimen. 
Made in the Biitish Museum. 
* Toula and Kail, “ TJeber einen Krokodil-Schadel aus den Tertiarablageruugen von Eggenburg,” 
Uenkschr. d. k. Akad. Wiss. math.-naturw. Cl. vol. 1. (1885) p. 299, pis. i.-iii. 
t Lydekker, “ On the Occurrence of the Crocodilian Genus Tomistoma in the Miocene of the Maltese 
Islands,” Quart. Journ. Geol. Soc. vol. xlii. (1886) p. 20. 
7 Op. cit. supra. 
II Pi’oc. Acad. Nat. Sci. Philad. vol. vi. (1852) p. 35. 
§ Osteographie, Atlas, vol. viii. pi. vi. 
^ Zool. New York, pt. iii. (1842) p. 28. 
