Edward Anthony Spitzka 39 
The cuneus is marked by several fissures, the more distinct being a 
cuneal fissure joining the occipital over a slight vadum, and a much-rami- 
fied segment near the dorsal border—an irregular postcuneal. 
GYRES OF THE PARIETAL AND OccIPITAL LOBES (LATERAL SURFACE).—The 
posteentral gyre is narrower than the precentral, especially in its dorsal 
portion, and is distinctly demarcated from the adjacent gyres. 
The parietal gyre is of fair size and well-fissured, but shorter than com- 
mon. 
The paroccipital gyre is of good size, U-shaped, curving around the 
simple-ending occipital fissure. 
The marginal gyre is of good size, and is traversed by the episylvian, by 
rami of the intermedial, and by an independent fissure. 
The angular and post-parietal gyres are exceedingly complex. Numer- 
ous fissures and ramifications often anastomosing in an intricate manner 
as well as deep vessel-grooves render a description of this region difficult. 
The precuneus and ecallosal gyre present nothing unusual. 
The cuneus is of moderate size. Its ventral border, as before stated is 
rectilinear. Its surface is richly fissured. 
FISSURES OF THE TEMPORAL LOBE (LATERO-VENTRAL SURFACE).—The super- 
temporal describes a very tortuous course. Its length is 13 em., extending 
from near the temporal tip well into the angular gyre. Just opposite the 
ventral end of the central fissure, the supertemporal communicates with 
the sylvian by means of a fairly deep vadum, and there are other numer- 
ous anastomoses. 
There are at least-four meditemporal segments of irregular ramified 
shapes. The subtemporal is represented by two pieces separated from 
each other by a very narrow isthmus. 
The collateral fissure attains a length of 12.5 em., and describes a 
marked zig-zag course. In the post-temporal region, the fissure divides 
into two equally long rami, which, diverging at first, again approach each 
other very closely. The lateral ramus, by comparison with the opposite 
hemicerebrum seems to represent the usual course of the main stem. 
A deep groove, representing the post-rhinal (amygdaline) fissure, arises 
from the basisylvian cleft, and joins the collateral over a slight vadum. 
The transtemporal fissures and gyres are well marked and present noth- 
ing unusual. 
GYRES OF THE TEMPORAL. LOBE.—The supertemporal gyre is very tor- 
tuous, due to the tortuous course of the supertemporal fissure, as well as 
to the numerous indentures of other fissures. In some places the gyre 
is quite narrow, in others, fairly broad. The meditemporal gyre is of 
quite as tortuous a contour. The subtemporal is the most massive of all. 
The subcollateral and subcalearine gyres are of the usual form. 
InsuLaA.—The insula is rather long and narrow. A portion of the pre- 
insula, as stated before, is not fully covered by the opercula, so that an 
area of about 1 sq. em. remains visible on the lateral aspect. The pole of 
the insula is prominent. The transinsular fissure is long and distinct. 
The insular gyres are simple; the post-insular gyre is quite narrow; the 
preinsular gyres are four in number. 
