JDB. J. MUBIE ON THE WniTE-BEAKED HOTTLENOSE. 149 



double or a single muscle, the direction of the fibres being di- 

 verse but continuity indivisible. The posterior portion resem- 

 bles the layers removed in being somewhat fan-shaped and lying 

 upon the frontal outside, as far back as the naso- frontal sac. In 

 front, with fibres of the second portion, it crosssos the face apo- 

 neurotically and joins the muscle of the opposite side. The 

 anterior second portion, naso-labialis, or premaxillary muscle, 

 lies longitudinally the length of the beak, and sparsely coalesces 

 at the mid line with its fellow of the opposite side. Above these 

 is the deposit of blubber and superincumbent tissues; below a 

 slight amount of fatty tissue and the premaxillary sacs. 



Besides being a decided compressor of the premaxillary sac, 

 the longitudinal layer last spoken of drags forwards and everts 

 the anterior lip of the blow-hole ; but the posterior fan-shaped 

 moiety of the same layer, through its upper apical tendinous 

 bridge and backwardly spread origin, influences retraction of 

 the same points ; and closure of the blow-hole is the sequence. 



I have not figured in the drawings what constitutes a partially 

 separate segment of the premaxillary muscle. So much are the 

 fleshy fibres intermixed with fat that it resembles above all things 

 a section of a well-larded tongue. It lies in front, and to some 

 extent forms the fore wall, of the deep anterior sac. It arises 

 from the prajmaxilla opposite the last tooth, and is inserted 

 just in front of the blow-hole. Use similar to the naso- 

 labialis. 



0. Kidneys, Penis, and Pelvo-caudal parts. — The two kidneys are 

 not placed exactly opposite to each other, the right being slightly 

 more forwards than its fellow. The former is 10| inches long by 

 5| broad ; the latter is | an inch shorter. Although composed of 

 an aggregate series of lobules, these are not simple and each 

 distinctly separate as in Glohiceps ; for some of them, in groups 

 of two and three, are partially fused together or coalesce. Such 

 compound lobules have together but a single hilus and aflferent 

 duct. The vessels, as in Grampus and OlohiocepTialus, enter an 

 inch below the upper end, and on the- ventral or lower surface. 

 The vein is most superficial. 



The suprarenal bodies resemble those of the Porpoise, being 

 homogeneous and firm in texture, and lying close to the renal 

 veins, not adherent to the kidneys. Each is 2 inches long and 

 1 inch broad. 



The penis has the usual elongate fusiform shape common to the 



