A MICMOIK UPON THE GENUS 
7u.. n-Kion .,f .lie .k..ll, c„.n|.a.-rf with that of J’. m^ar/Aus, i. ahoHo.. a„,l 
'■■'’“/Ww-V/arv r«-«.-The for... of the i,re.aaxinariea ie ..early ide.,tical with 
,...r^.^wi«rfthey«..« 
are well developed and they fonn a sc^ptum 
iM'twfen the two incinive Ihramina. , a n 
A'Wr—TI..- ....«.!. aa- .....cl. elo.tgated, ..arrow aiid <lc.ce..d.ng ; h.terally 
.l..-.- aa- ..r....gly aa-h.al, .....1 their ....terior extre.nities reach ae far lorw..rd 
„ ’.he |.a-...,.xill..ry .y.n|.hy»ia. They .liffer from the aaaale of ali.ed a|X.e.es 
1.. l.-i..e ..r the a.....e exlct trattavc-aely ti.rougl.out the.r cottrse. ll.e o..d. 
..rth.-..- I»....a. an. ..armw, ah.a.|.tly n>....<lcd a.id show no s.g..a of the trat.sverK 
.•X|a...ai,>.. which ia ao rl.an.rU-riatie <if those of P. mcgarhms. TI.ey are d.st...- 
fa.iii the iiuMaU of P. pahidosus by less width posteriorly. The nasal 
iiutelies ill /-. Itttieeps are narrower and longer than in P. pahidosus. 
Frontals. 'Phe dorsal extent of the frontals is probably the same as in the 
other allied siKH-ies. The iiiterorlntal portion is much narrower than in P. palu- 
dosuSy mill is slightly depressed. From the interorbital region the surface of the 
rniiitals rim-s gradimlly upward, and is limited externallj" by the strongly devel- 
<i|ssl diverging t«*iii|s»rul ridges which are well marked and are bordeix-d Ixdow by 
the d»H*p teiii|>onil fossa. The dorsal jiortion of the frontals be'tween the converg- 
ing teiii|s)rid ridges funiis an elongat<*d narrow channel which ishordereil upon each 
side hy the eonve.x margins of the temporal ridges. This grcMwe Ix'tween the 
teni|Mind ridgt's Ixi’nines shallow at the highest portion of the tenijxiral region, hut 
is c-oiiliiiiHsl iM»Ht<*riorly to the junction of the .sagittal with the lambdoidal crest. 
The fusion of tin- teni|M)ral ridges to fonn the sagittal crest is placed farther anter- 
iorly than ill P , pahidosus, hut the crest has not such a wide antero-postcM'ior extent 
as ill the skull of P. tucgarhhnis. 
Parieta/s. — 'Phe Inrgi'st part of the parietal is taken up in the formation of the 
exiHHsliiigly deep sagittal crest. The depth of the roof of the brain case*, and 
the l•oums,uent n*.hictio„ of the cerebral cavity, ar6 very great as compai-ed with 
/’. ptludosus. 
OrnfA/s.— nu. ...|,r,.-wci|.it,.I mgio.. of L. lalueps i, u..i,,,.c i.. it, l...gi. 
1.. ..1.1....1.1 cr.-,l, W1....I. wi,l..|y „vcrl..,..g tl.o i>ln..o of the „ccip..t, a..d who., view.,! 
fn.... tl... ..xt...., imlcriofly on „ li,,, witi, the ,,o,te,ior li,..it of the occii, 
im' '7 ' f .1 ' , of .lie occipit.,! ere,t arc .athor ,Iiircm.^t 
fn..., I „»c ,.l the .,tl„.r alhcd ,,«e. 08 , beh.g nearly vertical i.i p,„i.i„,. 
«r.'ir. rt'" "" 1 ..arrow for..,, whicir is in i,„.„g 
^'-'-0 of the 8.,:d,tT:;e,t':i7:“.diKli' z 
