TiiK SKii.r. OF ('iir.\i.i:uA. 



U3 



Fisclie. II. Teil.' Jeiiaisclie Zeit. f. jSTatuvwiss. 

 Bd. xii. Jena. 

 Wright, R. R. — 1884. "On tlie Nervous System and Sense 

 Organs of Amiiirus." Proc, Canad. Inst. vol. ii. No. '^. 

 Toronto. 



EXPLANATION OF THE TLATES. 



The fi<iui'es are all natural size. 



PXATE I. 



Fii'. 1. Lateral view of tlie liead of Chimcera coUiei, showing the latero-seusory 

 canals and the ampullary pores. 

 2. Mt'cliau view of the bisected skull. 



Plate II. 



Fig. ?}. Lateral view of the sliiill, with the labial and nasal cartilages in place. 



4. Lateral view of the anterior end of the sknll, with tlie ala nasalis and the 



cartilage I in place but the other labial and nasal cartilages removed, 



5. The same, with the ala nasalis and cartilage I removed, 

 tj. Ventro-anterior view of the end of the snout. 



Plate III, 



. 7. Dorsal view of the skull. 



8. Ventral view of the skull. 



9. Posterior view of the skull. 



Index Letters. 



acu, 

 adp, 

 aec, 



ant, 

 ecr, 



ec, 

 epsb, 



/', 



/«, 

 /". 



fvn, 



htnc, 

 limf, 



Irp, 



cartilage a of Hubrecht's descrip- 

 tions. 



foramen for nervus abducens. 



ibramen for arteria centralis 

 retina;. 



foramen for anterior cerebral vein. 



anterior dental phitc. 



anterior opening of ethmoidal 

 canal. 



antorbital process. 



cavum cranii. 



cartilage e of Hubrecht's descrip- 

 tions. 



ethmoidal canal. 



foramen for efferent pseudo- 

 branchial artery. 



foramen for nerve and arteiy. 



foramen for branch of nervus 

 ophthalmicus. 



foramen for nervus facialis. 



fenestra nasalis. 



foramen for branch of vena nasalis. 



foramen for vena nasalis. 



cartilage g of Hubrecht's descrip- 

 tions. 



hj'omandibular latere - sensory 

 canal. 



foramen for nervus hyoideo-man- 

 dibularis facialis. 



hypophysial groove. 



cartilage k of Hubrecht's descrip- 

 tions. 



lateral rostral process. 



cartilage /« of Hubrecht's descrip- 

 tions. 



md, 



mdl, 



mlf, 



n, 



no, 



o, 

 obc, 



ocm, 

 opf, 



opJi, 



pdp, 

 pec, 



Pf, 



pnh, 

 pnd, 



pre, 

 pst, 



put, 



pii, 



suuf, 



soc, 



SOS, 



suhc, 



t, 



ir. 



mandibula. 



mandibular labial. 



mandibular labial fold. 



process of cartilage k. 



nasal capsule. 



naso-Iabial fold. 



foramen for nervus opticus. 



outer buccalis latero - sensorj' 



canal, 

 foramen for nervus oculomotorius. 

 foramen for nervus ophthalmicus 



profundus, 

 foramen for nervus ophthalmicus 



superficialis. 

 posterior dental plate, 

 posterior opening of ethmoidal 



canal, 

 foramen for nervus palatinus 



facialis, 

 perforation for pedicel of carti- 



lagej^9f. 

 prenasal beak, 

 prenasal depression, 

 palatoquadrate. 

 premaxillary lip. 

 postorbital process, 

 pituitary fossa, 

 posterior upper labial, 

 foramen for pituitary vein, 

 supramaxillary fold, 

 supraorbital latero-sensory canal, 

 suborbital shelf, 

 suborbital latero- sensory canal, 

 foramen for nervus trochlearis. 

 foramen for iier\ub trigeminus. 



