396 Coe and Kunkel— California Limbless Lizard. 
cilia but differing from typical cilia in their more irregular and some- 
what tapering form. In Béraneck’s figures of the developing pineal 
eye, the internal borders of the cells of the lens are provided with a 
“hyaline substance,” forming an irregular layer of about the same 
thickness as the layer of processes just mentioned in Anniella, and 
it is likely that these processes are simply the coagulated “hyaline 
substance” of Béraneck (’87). This author states that both lens 
and retina secrete a substance which fills up the cavity. In nearly 
all cases the cavity contains some material in contact with the cells 
of the lens and polar region of the retina; that in contact with the 
inner side of the lens has an appearance that resembles cilia, while 
that from the retina is more of a loose reticular structure. 
In summing up the characters of the pineal apparatus and related 
parts of the brain, Anniel/a has been found to agree very closely 
with Angués in practically all essential points. The pineal eye is 
more widely separated from the epiphysis than in Anguis. In late 
embryos and adults there is no connection between the pineal eye 
and the epiphysis. The paraphysis of Anniedla is rather more tubu- 
lar and longer than in Angwis. The epiphysis is inclined posteriorly 
and dorsally, while in Anguis the distal portion is inclined anteriorly, 
almost at right angles to the proximal portion. The superior and 
posterior commissures are very closely related topographically to each 
other, and extend between the posterior portions of the ganglia 
habenule. In front of the epiphysis the post velar arch is very 
much elongated to form a tubular sac. Projecting ventrally from 
the dorsal side of the third ventricle immediately in front of the 
post velar arch is the velum transversum, along the distal margin of 
which is situated the commissure, which is a rudiment of the fornix. 
The paraphysis is a long tubular branched sac extending dorsally and 
posteriorly from the roof of the third ventricle, immediately in front 
of the velum. 
It has not been deemed necessary to mention the numerous papers 
which have appeared upon this very interesting portion of the brain, 
because of the most excellent resumé of the literature and discussion 
of the results of investigations by Gaupp (’97). 
SHEFFIELD BroLocicaL LaBporatory, May, 1905. 
