[93] THE OSTEOLOGY OP AMIA CALVA. 839 



Enpt. Entopterygoid. 



E. 0. Exoccipital. (See also Ex., Fig. 1.) 

 ep. Epiphysial crest. 



Ep. 0. Epiotic. 



E8C. Extrascapula. (Sagemehl.) Pig. 1. 



Eth. Ethmoid. 



Ex. Exoccipital. (Sagemehl.) 



F. Frontal. 



/. Superior maxilla. (Franque. ) PI. X, Fig. 26. 



fa. Foramen, for exit of facial nerve. 



fh. Hypophysial foramen. 



g. Intermaxillary. (Franque.) 



G. hy. Glossohyal. 



gph. Foramen for glossopharyngeal nerve. 



G.pl. Gular plate. 



/(. Antorhital. (Franque.) PL II, Fig. 7. 



H. hy. Hypohyal. 



H. M. Hyomaudibular. 



lim. Articular facet for hyomandibnlar. 



Hyo. c. Hypocoracoid. 



Hyp. e. Hyperooracoid. 



i. Infraorbital bones. (Franque.) (PI. X, Fig. 26.) 



ih. Interhyal. 



I. Op. Interoperculum. 



Jc. Infcercalare (opisthotic). Dr. Sagemehl evidently meant lo. to appear on hia 



figures, and this must be a mistake of his engraver. 

 jf. Continuation of interspinal bones. (Not previously described.) 

 jn. Membranous tract extending between frontals and nasals. 

 k. Postorbital. (Franque.) PI. II, Fig. 7. 

 fc, fc', k". Designate, with a small unnumbered piece above them, a disconnected 



chain of bones, that are sometimes found fn Amia, between the postorbitals and 



preoperculum. (Plate IV, Fig. 16.) 

 La. Lacrymal. 



m. c. Meckel's cartilage in Plate III, Fig. 15. 

 mk. Meckel's cartilage. (Bridge. ) Plate V, Fig. 17. 

 M. Ft, Metapterygoid. 

 mt. mk. Mento-Meckelian bone. 

 Mx. Maxillary. 



«. Suprascapula. (Franque.) Plate II, Fig. 7. 

 Na. Nasal. 



Na^. A semicartilaginous piece of bone found in Albula vulpea. Figs. 29, 30. 

 Ob. Basioccipital. (Sagemehl.) 



Oe.I, Oc. II, First and second occipital arches of Amia. (Sagemehl.) 

 00. 1, oc. II, and oo. III. Foramina of exit of the first to the third occipital nerves vt 



Amia. ( Sagemehl, ) 



00. r. Occipital ribs in Micropterus. (Shufeldt.) 



01. Occipitale laterale. (Sagemehl.) 

 ol. Opening for nasal nerves. 



Op. Operculum. 



op. Optic foramen. 



08. Orbitosphenoid. 



P. Inframaxilla. (Franque.) 



Pi. Dentary. 



P3. Coronoid. 



P5. Os coudyloideum. 



