MORPHOLOGY OF CRANIAL MUSCLRS IN SOME YEKTEBRATES. 315 



anterior, arcualis dors. M. arcualis dorsalis. aitr. temp. n. Auriculo- 

 temporal nerve, br. add. M. adductor arcus branchialis. br. aor. ar. 

 Branchial aortic arch. br. bar. Branchial bar. 6r. ?uy. Branchial myo- 

 tome, branch, liyoid. M. branchio-hyoideus. bucc. car. Buccal cavity. 

 ceph. ccel. Cephalic cceloni. cer. br. Cerato-branchial cartilage, eer. hy. 

 ang. M. cerato-hyoideus angularis. cer. hijal. c. Cerato-hyal cartilage. 

 first cerv. n. First cervical nerve, ccel. Coelom. cons, colli. M. constrictor 

 colli, cons, operc. M. constrictor operculi. cor. branch. M. coraco- 

 branchialis. cor. liyoid. M. coraco-hyoideus. cor. maud. M. coraco-man- 

 dibularis. c.^vd. Dorso-ventral muscular sheet inhyoid segment, dil. lary. 

 M. dilatator laryngis. dilat. operc. M. dilator operculi. dor. aor. Dorsal 

 aorta, dorso-lary. M. dorso-laryngeus. epibr. Epibranchial cartilage, ext. 

 aud. meat. External auditory meatus, extra-temp. M. extra-temporalis. 

 Gass. g. Gasserian ganglion, gen. glossus. M. genio-glossus. gen. glossus 

 and tingualis an. Anlage of M. genio-glossus and lingualis. gen. hyoid. 

 Genio-hyoid. gill. m. An. Anlage of muscles of external gill. g.-c. Gill- 

 cleft, liy. ceph. ccel. Hyoid section of cephalic coelom. hyogloss. M. hyo- 

 glossus. hyogloss. and stylogloss. An. Anlage of M. hyoglossus and M. 

 styloglossus, hyohy. inf. M. hyo-hyoideus inferior. Hyohy. skjj. M. hyo- 

 hyoideus superior, hyoid bar. Hyoid bar. hyoid my. Myotome of hyoid 

 segment, hyoid aor. ar. Hyoid aortic arch, hyomax. M. hyomaxillaris. 

 liyomax. lig. Hyoniaxillaris ligament, hyomand. c. Hyomandibular carti- 

 lage, hypobr. c. Hypobranchial cartilage, hypohycd. Hypohyal cartilage. 

 hypohr. sp. m. An. Anlage of hypobranchial spinal muscles, ivf. lab. 

 cart. Inferior labial cartilage, interarc. vent. M. interarcualis ventralis. 

 interbas. M. interbasalis. interhyal. Interhyal cartilage, interhyoid. 

 M. interhyoideus. intermcmd. M. intermandibularis. lary. Larynx. 

 lev. br. M. levator arcus branchialis. lev. hyoid. M. levator hyoidei. 

 lev. lab. siq). An. Anlage of M. levator labii superioris. lev. max. sup. 

 M. levator maxillae superioris. lev. pcd. and tens. pal. An. Anlage of 

 levator and tensor palatini, lingucdis. M. lingualis. M. marg. M. 

 marginalis. maud. aor. ar. Mandibular aortic arch, viand, ceph. ccel. 

 Mandibular section of cephalic ccelom. maud. lab. M. mandibulo-labialis. 

 mand. my. Myotome of mandibular segment, maud. seg. Mandibiilar 

 segment, wrtss. M. massetericus. mylohyoid n.M.y\ohyoid nerve. Me. 

 Meckel's cartilage, mentcd n. Mental nerve. N. Olfactory epithelium. 

 nictat. m. An. Anlage of nictating miiscles. obliq. dors. M. obliquus 

 dorsalis. obliq. iuf. M. obli(|uus inferior. obliq. sup. M. obliquus 

 superior, oblicj^. vent. M. obliquus ventralis. cesojdi. const. Constrictor 

 of oesophagus. qper._//cZ. Opercular fold. orb. hyoid. M. orbito hyoideus. 

 pcd. pr. of quad. Palatine process of quadrate, pal. quad. Palato- 

 quadrate. prtL quad. Me. palato-quadrato-mandibular arch. phar. 

 Pharynx, phar. br. Pharyngo-branchial cartilage, phar. clav. ext. M. 

 pharyngo-clavicularis externus. phar. clav. int. M. pharyngo-clavicularis 



