158 EDWARD L. RICE 
of the footplate, is attached near its lower extremity, and extends 
almost directly outward, so that the columellae of the two sides 
lie almost precisely in the same line. A little beyond its middle, 
the stalk carries a well-marked process (fig. 7, pr.int.). extending 
downward and very slightly forward. This is undoubtedly to be 
homologized with the processus internus of Versluys, although 
it differs in some points from the corresponding structure in 
Lacerta. In EKumeces the process is directed more ventrally and 
less anteriorly than in Lacerta; thus it does not reach or even 
closely approximate the quadrate. It is also much less strongly 
developed; in stage 6 it is hardly, if at all, reeognizable—a con- 
dition according well with the observation of Versluys (’98) 
that the processus internus is lacking in adult Scincidae. Among 
the lizards Versluys (98, ’03) also records the absence of this 
process in adult Uroplates and Anguidae, and in embryos and 
adults of the Geckonidae, although he cites Peters (’69) as author- 
ity for its presence in an embryonic geckonid, Hemidactylus. 
In Sphenodon Versluys (’03) reports the process lacking; 
Schauinsland (’00), on the other hand, homologizes the ‘Inser- 
tionstheil (mit dem Quadratum)’ of his account with the proces- 
sus internus of Versluys. I find no record of the presence of the 
processus internus in either turtles or snakes; in Testudo its 
absence is definitely affirmed by Bender (712). It is also lacking 
in the crocodiles, according to Versluys (03, revising the state- 
ment of his paper of ’98) and Shiino (14). In the vicinity of the 
processus internus in Lacerta Gaupp describes a well-marked 
ridge extending over the dorsal surface of the stalk of the colu- 
mella. This ridge is connected with the processus paroticus by 
the band of connective tissue mentioned in a preceding paragraph. 
That this ridge is a remnant of the processus dorsalis can hardly 
be questioned; in Eumeces it is absent in all observed stages. 
Between the processus internus and the insertion plate, the stalk 
is sharply constricted and vertically flattened, as noted by 
Versluys (98) in adult lizards, where the flattening is accom- 
panied by a marked flexibility. 
The main part of the insertion plate (fig. 7) may be compared 
with a stout club, with the larger end pointed obliquely upward 
