876 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [130] 



Prenaaal bone 



process 



Preoperculum 7, 46, 47, 48, 49, 53, 



Preorbital 7, 



Prezygapophyses 



Primoidal cranium 11, 22, 31, 



cartilage of 13, 



cartilaginous portion of 



the 



composition of 



of Amia, posterior lat- 

 eral angle of 



ossifications of 8, 



relations of the squamo- 

 sal to 



Primoidal skull, lateral angle of the 



Pro-atlas 



Proceedings of American Association of 



Science 



Process, anterior clinoid 



Prolongation of notochord 



Prootic 51, 56, 59, 60, 61, 64, 



Pro-otic bridge 53, 



Proscapula 78, 



Protractile snouts, fishes with 



Pterotic 60, 61, 



Pterygoid 



teeth of 



Quardrate 48, 49, 53, 55, 72, 73, 



bone 



Eadius 



Ramus lateralis neiTi trigemini 



palatinus nervi facialis 



Eana 



iJecessus cochlearis 



Recti extern! 32, 



Rectus externus 



Reference letters used in the plates, expia- 

 tion of 



Reptiles, surangular of 



Respiratory apparatus 



Rhinal chamber 



Ribs 



84,85,88 



Rolleston, work cited 81 



Sacculus 24, 25, 27, 28 



recess for 24 



Sagemehl, Dr. M 1,11,43,45,46,50,51,57 



Sagemehl. nomenclature of cranial elements 



used by 52 



Sagemehl, occipital arches of 51 



Sagemehl, occipitale laterale of 50 



St. HiUaire, Geoffroy, work cited 28 



Salamanders, larval 56 



Salbion 84 



Salmon's skull 60 



SakuonidsB, free occipital arches in 13 



Sapraclaviculare 78 



Scales 80 



Scapula 77, 78 



Scapulaire 78 



Scombridse 59 



Scopeius 25 



ScyUia, skull in the 40 



Scyllians 37 



ScyUium . 40 



Page. 

 Selachians 2, 18, 30, 34, 35, 37, 40, 57 



auditory apparatuses 



canalis transversus of 



exit of the cranial nerves in 



facial nerve in 



first spinal nerves in the 



hyomandibular articulation in . . 

 hyomandibular cleft of 



30 

 33 

 26 

 31 

 18 

 41 

 29 



nasal alar cartilage of 37, 41 



nasal apertures in 41 



nasal valves of 38 



occipital region of the 14 



parietal grooves in 41 



posterior arches of 40 



ramus palatinus in 20, 42 



region of the labyrinth of 40 



skulls of 18, 21, 89 



sound-conducting apparatus in. 39 



subcranial canal of 33 



teeth in 19 



the cavity of the labyrinth in. . . 25 



Selaohii 23, 25, 28, 39 



cranium of 17 



eye supports in the 23 



nasal valves in 38 



optic foramen of 41 



primoidal cranium in , 17 



tail of 84 



transverse canal of 34 



Sella turcica 32 



Semicircular canal, anterior 25 



outer 25 



posterior 25 



superior vertical 61 



Semi-occipital arch, a third anterior 16 



Septomaxillare 23 



Septomaxillaries 23 



Septomaxillary 50, 53, 54 



Shads 24 



Shoulder-girdle 5, 50, 81 



nomenclature of 77 



Shufeldt, nomenclature of cranial elements 



used by 52 



Shufeldt, R. W., work cited 59, 91 



Siluroidei 56, 57 



skuU of 47 



Siluroids 11, 35 



tail of 87 



Siren 56 



Skeleton of osseous rays 84 



78 

 17 

 30 

 17 

 17 

 9 

 17 

 1,77 

 30 

 62 

 78 



Skull, cover-bones of 



how many metameres contained in 



labyrinth region of 



Selachian 



three vertebrse coossified with 



true ossifications of 



vertebral theory of 



Smithsonion Institution 



Snakes 



Southern California 



Spangenstiick 



Spatularia 44, 56 



Speitzloch cana! 29 



SphenotiG 52, 56, 61, 66 



Spinal canal ^8 



