Edward Anthony Spitzka 51 
There is an irregular zygal intraprecuneal just dorsad of the precuneal, 
which crosses the dorsi-mesal border. 
The cuneal fissure is distinctly zygal. There is an irregular postcuneal 
fissure which sends a ramus into the paroccipital (possibly a post-paroc- 
cipital element). 
GYRES OF THE PARIETAL AND OCCIPITAL LoBEs (LATERAL SURFACE).—The 
postcentral gyre is narrow in its dorsal two-thirds, quite broad in its 
ventral portion, and quite tortuous. The parietal gyre is shorter than on 
the right side, but richly fissured. The paroccipital gyre is broad in its 
caudal arm, but quite narrow in its cephalic portion. A ramus of the 
posteuneal, possibly a postparoccipital piece, lies caudad of the occipital. 
The marginal gyre is unusually broad, and curiously marked by the 
quadri-radiate fissure described before. The angular gyre is very complex. 
MEsIAL SuRFACE.—The precuneus is rather small, probably owing to the 
existence of an adoccipital separating off a cuneolus. The cuneus is of 
good size and richly fissured. 
FISSURES OF THE TEMPORAL LOBE (LATERO-VENTRAL SURFACE).—The super- 
temporal fissure presents a curious arrangement. Cephalad there are two 
independent zygal segments of which the caudal one anastomoses with the 
sylvian. The larger part of the fissure attains a length of 9 em., almost 
reaching the parietal. In its course it anastomoses with a meditemporal. 
Further caudad, it anastomoses with the (exoccipital ?) complex in the 
parieto-occipital transition. 
The meditemporal is represented by three segments. The subtemporal 
is 6.5 em. in length, and richly ramified. The collateral is a distinct, 
boldly-curved fissure of a length of 11 em. 
There is a short but distinct postrhinal (amygdaline) fissure. 
GYRES OF THE TEMPORAL LOBE (LATERO-VENTRAL SURFACE).—The super- 
temporal gyre, owing to the odd course and formation of the supertem- 
poral fissure, while massive is unusually tortuous. The meditemporal and 
subtemporal gyres on the whole, are broad, and richly fissured. The sub- 
collateral gyre is well-defined, and considerably fissured, especially in 
transverse directions. 
The subcalearine is of the usual form, and is marked by one long fis- 
sural segment lying between the collateral and calearine fissures, dis- 
tinctly dividing the gyre into two longitudinal tiers. 
Tue InsuLA.—The insula is of simple configuration, resembling in its 
general appearances those of the other Eskimo hemicerebra, and exhib- 
iting one postinsular and four preinsular gyres. 
RicHt HEMICEREBRUM. 
THE INTERLOBAR FissurEes.—The Sylvian Fissure and its Rami.—The 
sylvian fissure is 4.3 em. in length and of the following depths: Pre- 
Sylvian depth, 13 mm.; medisylvian depth, 18 mm.; postsylvian depth, 
25 mm. 
Its course is irregular. The presylvian is a very short fissure. The 
subsylvian is simple and 2 em. in length. The episylvian is 2°em. in length 
