576 DR. J. MUHIB ON THE ANATOMY OF THE SEA-LION. 



Fig. 26. Pisiform bone, (A) upper and (B) lower surface : o, outer extremity; ul, ulnar 

 and cuneiform facet. 



Fig. 27. Trapezium, (A) upper and (B) lower and inner face : s, scapho-lunar border ; 

 0, outer border ; m\ first metacarpal facet ; td, trapezoidal facet ; m^, second 

 metacarpal facet ; j>i palmar surface. 



Fig. 28. Trapezoides : (A) inner and anterior faces, (S) outer and lower faces, tp, facet 

 for trapezium ; ??i^, second metacarpal facet ; d, upper or dorsal surface ; 

 J), palmar surface ; s, scapho-lunar facet. 



Fig. 29. Os magnum, (A) inner and (B) outer surface: d, dorsal, andj?, palmar apices; 

 nv' and m*, facets for third and fourth metacarpals ; s, scapho-lunar ridges ; 

 cb, cuboidal facet ; td, trapezoidal facet. 



Fig. 30. Unciform, (A) postlateral inner and (B) postlateral outer surfaces : s, sca- 

 phoid facet; mg, face partially articulating with os magnum; m* fourth 

 metacarpal facet ; c, cuneiform facet ; m\ fifth metacarpal facet ; d, dorsal, 

 and J), palmar surface. 



Fig. 31. Astragalus, (A) upper and (B) lower surfaces: t, tibial, andy, fibular articular 

 faces ; n, navicular facet ; c', c°, the two calcaneal facets. 



Fig. 32. Os calcis, (A) superior and (B) inferior surfaces : *, epiphysis adherent to the 

 posterior extremity of the tuberosity; a\ a', the two astragaloid facets; 

 ch, cuboidal articular surface. 



Fig. 33. The cuboid: {A) upper, outer, and partly anterior and posterior faces; {B) 

 inner and inferior faces, c, calcaneal end; m*'^, distal extremity for fourth 

 and fifth metatarsals ; d, dorsum ; g, peroneal groove ; n, naviculare, and ec, 

 ecto-cuneiform facets. 



Fig. 34. Naviculare, {B) posterior and {A) anterior faces : d, dorsum ; a, astragaloid 

 fossa ; i, internal angle ; ec, mc, en, ecto-, meso-, and entocuneiform facets. 



Fig. 35. Entocuneiform, dorsal {A) and plantar {B) superficies : n and mc, facets for 

 naviculare and mesocuneiform ; m^ and m\ articular faces of first and second 

 metatarsals ; d, dorsum ; g, groove for peroneus longus. 



Fig. 36. Mesocuneiform, [A) internal and [B) external faces: d, dorsal, and^;, plantar 

 border ; iii', second metatarsal articular surface ; ec and en, ecto- and ento- 

 cuneiform facets. 



Fig. 37. Ectocuneiform, {A) exterior and {B) interior faces : d and^, dorsal and plantar 

 borders ; 7n,''*, articular border for third and fourth metatarsals ; ch, cuboid 

 facet ; n, hind border or naviculare facet ; en, part entocuneiform facet. 



PLATE LXXVIII. 



Fig. 38. Upper surface of the brain of the male Otariajubata, about nat. size. 



Fig. 39. Base of the same, with cerebral nerves. 



Fig. 40. Right lateral superficial view of the brain, also nat. size. 



