STUDY OF HRAINS OF SIX EMINENT SCIENTISTS AND SCHOLARS. 275 



The supertemporal gyre is particularlj^ large at its transition into the marginal 

 and angular gyres. The remaining temporal gyres all show a good degree of devel- 

 opment. 



The infiula is well-formed, so far as could be seen, though not large. There are 

 four preinsular and one postinsular gyres. Compared with that of the right side it is 

 better differentiated and the insular pole is more prominent. 



Right Hemicerebrum. The Interlobar Fissures. The Sylvian Fissure and its 

 Rami. — The sylvian fissure is even shorter than that of the left side, being only 3.5 

 cm. in length. Its depths are as follows: At the pre-sylvian point 15 mm.; medi- 

 sylvian, 24 mm.; post-sylvian, 28 mm. The pre-sylvian is 3 cm. long; the sub- 

 sylvian is absent. The epi-sylvian and hypo-sylvian rami much resemble those of 

 the left half 



Ihe central fissure is somewhat less sinuous than that on tbe left side and its length 

 is 11.5 cm. 



Ihe occipital fissure, on the mesal surface, is 3 cm. in length ; its dorsal termination 

 is almost hidden through the close approximation of adjacent parts, together with 

 almost complete submergence of the paroccipital gyre. 



The calcarine fissure and postcalcarine together attain a length of 7 cm. The 

 occipito-calcarine stem is 3 cm. in length. 



Fi.ssureof the Frontal Lobe (Lateral Surface). The Precentral Fissural Complex. — The 

 supercentral is tri-radiate ; from it springs the suprafrontal. The precentral is short 

 but nmch ramified, from it springs the subfrontal. There is a short transp re-central. 



The superfrontal fissure lies in the postfrontal region, joining the medifrontal 

 cephalad. The medifrontal, springing from the orbitofrontal, pursues a very flexuous 

 course. The subfrontal fissure is short. There is well-defined radiate fissure, which 

 seems to be duplicated by a parallel element (;y7/") just ventrad of the principal fissure. 



Mesal Surface. — The supercallosal is represented by a long cephalic segment, 

 much ramified and anastomosing with the rostral, while a caudal segment joins the 

 paracentral. The paracentral is of the usual type. The rostral fissure is 5 cm. in 

 length ; the subrostral is slight. 



Orbital Surface. — The fissures include a well-marked transorbital fissure together 

 with a zygal and a tri-radiate piece in the preorbital region. 



Gyres of the Frontal Lobe {Lateral Surface). — The precentral gyre is of rather a 

 finer contour and not so wide in its middle part as that of the left side. The super- 

 frontal is of good width and marked by several paramesial segments. The medi- 

 frontal is very wide and exceedingly complex in its fissuration. The subfrontal shows 

 nothing notable and is less extensive than that of the left. 



