FOSSIL VA RA N ID AE AND MEGALANIDAE. 
407 
drawings in Falconer’s «Memoirs». 1 I cannot omit in this place to mention 
the vçry authentic opinion of the excellent scientist, Mr. Siebenrock, whom 
I consulted on. the subject of V. sivalensis, and who kindly replying to my 
question in a letter written on the 19 th of Febr. of this year, gives the 
following opinion: «Die Figur 1, la, lb auf Taf. 85 in Pal. Indica, Ser. 10, 
Vol. 3, welche das distale Humerusende von Varanus sivalensis darstellt, 
gehört mit Bestimmtheit zur Gattung Varanus. Ich glaube sogar, daß V. 
sivalensis Falc. mit V. salvator Laur. sehr nahe verwandt sein muß, weil 
sich die distalen Humerusenden dieser beiden Arten so stark ähnlich sehen.» 
The vertebra reproduced (Textfig. 18) is also of large size, though pro¬ 
bably having derived from a somewhat smaller individual than the humerus. 
Fig. 13. t Varanus sivalensis Falc. Dorsal vertebra from posterior (a) and ventral (6) 
aspect. (Biit. Mus. No. R. 739.) — Nat. size. — Authors pen drawing provided with 
explanations after Fig. 11, p. 55, in Lydekker’s «Fauna of the Karnul Cave;». — Ex¬ 
planation of abbreviations : jrh = facies rhomboidalis ; lm = linea medialis ; ar = arcus 
vertebrae ; pt = processus transversus ; m — margo inferior ; fpg = fossa paraglenoidealis. 
Its anterior portion is very wide, the cup forming a broad ellipsis ; the 
processûs transversi are strongly developed, presenting large facies costales ; 
the centre is bilaterally strongly concave, thus acquiring in the middle- 
region, beyond the wide anterior part, a slender, subtriangular aspect ; 
it bears a strongly marked, straight margo inferior (mihi). The ball viewed 
from below, is well developed, ellipsoid, somewhat resembling in structure 
that of V. marathonensis Weith. It is of a cap-like aspect, and presents on 
each side of both its lateral confines small, angular projections. Foveæ 
paraglenoideales (mihi) strongly marked. The shape of proc. obi. ant. could 
not be defined from Lydekker’s figurés. On the figure representing the 
above mentioned dorsal vertebra in its posterior aspect, the massive 
development as well as the relatively strong projection 
1 The humerus is here figured two thirds of its natural size, and represented in 
three different views publishe d also bv Lydekker, as well as from a lateral aspect' 
(radial side). 
