STRANDED AT LONGNIDDRY. 249 



portions of these parts to the length of the entire body ; in the form of the beak ; 

 and in the curve of the lower jaw, the resemblances are very striking. The 

 osteological characters have also much in common ; but the consideration of 

 these I shall not enter into on this occasion. 



The comparison I have now made between these different specimens of 

 Finners, leads me to the conclusion that the following should be referred to 

 the Balcenoptera Sibbaldii : — 



The North Berwick whale. 



The Hull skeleton. 



The Utrecht skeleton, now in the British Museum. 



The Gothenburg whale. 



The Steypireythr. 



The Longniddry whale. 



And, in all probability, the Ostend whale, and Sibbald's " Balsena tripinnis 

 quae rnaxillam inferiorem rotundam, et superiore multo latiorem habuit." 



EXPLANATION OF THE PLATES. 



With the exception of fig. 1 Plate V., of figs. 19, 20, 21, 22, 23, 24, 25, 27, 28, Plate VIL, and of 

 fig. 29 Plate VIII., the illustrations have been very carefully drawn, under my superintendence, by Mr 

 J. B. Abercrombie, from nature. Eig. 27 was drawn by Mr Coughtrey, fig. 28 by Mr Foulis, and 

 figs. 19 to 25 inclusive, and fig. 29, were sketched by myself from microscopic preparations. As far as 

 possible, the specimens from which the drawings were taken have been preserved in the Anatomical 

 Museum of the University of Edinburgh. When not otherwise stated, the drawings represent portions 

 of the adolescent animal. 



Plate V. 



Figure 1. Side view of the Longniddry Whale. This drawing was constructed from photographs, 

 from pencil sketches, and from a water-colour sketch by Mr Sam. Bough. The 

 lower jaw is represented somewhat out of position so as to give a side view of the baleen 

 and of the dorsum of the tongue. 



Figure 2. The falcate dorsal fin of the foetus. 



Figure 3. The horizontal tail of the foetus. 



Figure 4. The abdominal plicse of the foetus, showing bifurcations of the ridges. 



Figure 5. Supero-anterior surface of the left flipper of the foetus. The outlines of the bones of the 

 antibrachium and of the four digits are represented. The posterior edge of the flipper 

 was much thinner than the anterior. 



Plate VI. 



Figure 6. The clitoris, below which is the opening of the urethra, and the folds of mucous membrane, 



on the floor of the vestibule. The labia majora have been drawn asunder to expose these 



parts. 

 Figure 7. The orifice of the nipple fossa, displaying the nipple with the pedunculated papillae at its 



summit. 

 Figure 8. The anal orifice, with the ruga? of the integument converging to it. 

 Figure 9. The ventral wall of the foetus, displaying the penis with the crescentic folds of skin at its 



root, the median perineal raphe, with a rudimentary nipple fossa on each side, and, more 



posteriorly, the anal orifice. 



VOL. XXVI. PART I. 3 T 



