768 
PA Ss I ESS: 
(VoL. XII. 
opfr. ophthalmic foramen. 
opf.so.-7 branches of ramus ophthalmicus superficialis facialis to sense 
organs of supraorbital canal. 
opp. ramus ophthalmicus profundus trigemini. 
oprf. ramus opercularis facialis. 
opt. ramus ophthalmicus superficialis trigemini. 
opt.sc. subcutaneous branches of ramus ophthalmicus trigemini. 
optstv.sc. fused subcutaneous branches of ramus ophthalmicus trigemini 
and supratemporal branch of vagus root. 
OS. orbitosphenoid. 
os. obliquus superior. 
Ov. /-/77. obliqui ventrales of first three branchial arches. 
Ov. /V.*-3 three divisions of obliquus ventralis of fourth arch. 
ov and vo. vein coming from eyeball. 
ov’and vo’. vein coming from eyeball. 
p. pectoral fin. 
PA. parietal. 
paf. ramus palatinus anterior facialis. 
pafir. foramen for ramus palatinus anterior facialis. 
pe. palatine canal. 
pee. pharyngo-clavicularis externus. 
pet. pharyngo-clavicularis internus. 
PE. petrosal. 
pf ramus palatinus facialis. 
pfr. palatine foramen. 
pel. ramus pharyngeus glossopharyngei. 
ph. pit for hypophysis cerebri and saccus vasculosus. 
piv4 ramus pharyngeus inferior n. vagi quarti. 
PMX. premaxillary. 
pn. prenasal process (Bridge). 
pra. posterior nasal aperture. 
POP. preoperculum. 
popp. portio ophthalmici profundi. 
POR. first postorbital. 
POR. second postorbital. 
ppc. canal for ramus palatinus posterior facialis between the auto- 
and dermo-palatine bones. 
ppf ramus palatinus posterior facialis. 
ppfr. foramen for ramus palatinus posterior facialis. 
fq. cartilaginous portion of palato-quadrate. 
pr. preorbital process. 
PRE. prefrontal, or antorbital ossification. 
prel. ramus pretrematicus glossopharyngei. 
prv.-4  pretrematic branches of first to fourth vagus nerves. 
PS. parasphenoid. 
psb. pseudobranch. 
PSF. postfrontal (Sag., Allis), dermo-postfrontal (Bridge). 
psgl. ramus posttrematicus glossopharyngei. 
PSP. processus spinosus. 
