294 DK. J. MUBIE ON THE ORGANIZATION OF THE CAAING WHALE. 



DESCEIPTION OF THE PLATES. 



PLATE XXX. 



Fig. 1. Drawing from nature of the young female Pilot Whale, Globiocejihalus melas, 



Traill. To a scale of 1-3- of the natural proportions. 

 Fig. 2. Dorsal aspect of the same Whale. 



Fig. 3. Its blow-hole, of nat. dimen. : a, anterior, and p, posterior lip. 

 Fig. 4. The eye, about nat. size. 



PLATE XXXI. 



Fig. 5. Foreshortened view of the head, looking into the opened mouth of the same 

 female Globiocephalus. Considerably reduced in size. T, tongue ; P, palate ; 

 f, faucial membrane aud folds ; a, angle of the mouth. 

 Fig. 6. Segment of the roof of the mouth, showing palatal rugosities, glands, and pre- 



maxillary teeth, the left series of which are complete : g, gutter ; «, angle. 

 Fig. 7. A left premaxillary tooth, nat. size, with outline of the gum {g) : the ridges 



seen in cross section. 

 Fig. 8. A longitudinal mesial section of the same tooth : ]], pulp. 

 Fig. 9. Left posterior mandibular tooth, seen from behind, and shown with gum-ridges 



as in fig. 7, also nat. size. 

 Fig. 10. A small portion of the faucial part of the palate, showing mucous crypts, 



c, or fissures and glands, gl; fg, fungiform papillae. 

 Fig. II. Underview of the tongue, larynx, and part of the trachea, prepared chiefly 

 to show the muscular structures. The superficial layer remains on the left, 

 but a deeper dissection is made on the right side. 

 /, frsenum linguae ; Gh, Gh*, genio-hyoid, entire and cut tendinous origin ; St.g, stylo- 

 glossus ; G.h.g, genio-hyo-glossus ; Hg^, Eg'', hyo-glossus, fii'st and second heads ; 

 Ihy, interhyoideus ; S.&Mh, insertions of sterno- and mylo-hyoidei : Th, thyroideus ; 

 iS./S/^partof sterno-thyroid; Ci^/i, crico-thyroid ; TA.^Z, thyroid gland ; 0.#/(_y, occipito- 

 thyroid ; th, thyro-hyal ; T, thyroid cartilage ; I, thyro-hyoid ligament ; tr, trachea ; 

 sin, superior laryngeal nerve ; 8\ hypoglossal nerve. 

 Fig. 12. Upper or palatal aspect of the same parts. Arytenoid conjoined with epiglottic 

 cartilages are seen protruding upwards, surrounded by their sphincter. 



T, tongue ; P.g, palato-glossus ; P.ph, palato-pharyngeus, cut across ; Cs, Cm, & Ci, 

 constrictores superior, medius, et inferior ; ej), epiglottis ; A, arytenoid cartilage ; la, 

 lingual (ranine) artery ; li^.n, hypoglossal nerve ; Ihy, interhyoideus ; Sph, stylo- 

 pharyngeus ; oe, oesophagus ; tr, trachea ; Shy, stylohyoideus ; Stg, styloglossus ; f, 

 frsenum linguae. 



