OF THE RED CRAG. 



33 



The sex of this individual is not noted ; it differs from Sowerby's species (a 

 13) in the much smaller size of the mandibular pair 

 of teeth, which are similarly situated ; but the speci- 

 men was rather larger. The smallness of the dorsal 

 fin in both is indicated by the term ' micropterus' 

 applied to the Havre Ziphial. This character 

 may be more widely or generally manifested in the 

 genus Ziphius} 



In the Anatomical Museum of Christchurch, 

 Oxford, is preserved the portion of skull (fig. 14) of 

 the species of Ziphius on which Sowerby founded 

 his Fhyseter bidens, with a clear apprehension of 

 its close and intimate affinities to the Cachalots. 

 The specimen had been stranded on the west of 

 Scotland (Elginshire ?). In the skull of this species, 

 as in Ziphius cavirostris, Cuv., the premaxillaries 

 (22) are separated from each other above for nearly 

 the whole length of the rostrum, exposing (at 13) 

 the upper canaliculate surface of the vomer, but 

 including the proportion of the prefrontals which 

 have been ossified into a dense convex tract at 14. 

 The departure from symmetry in the naso-maxil- 

 lary part of the skull is rather greater than in 

 Ziphius Arnouxii, rather less than in Z. Layardi. 



' See, e.g., Dumortier, loc. cit., plate i, and the figure of 

 Ziphius {Ziphiorhynchus) patachonicus in Burnieister's ex- 

 cellent 'Anales del Museo Publico de Buenos Ayres,' 4to, 

 entrega quinta, 1868, pi. xv. On the 26th of May I was 

 favoured by William Anukews, Esq., M.R.I. A., with a copy 

 of his Memoir, from vol. xxiv (1869) of the 'Trans, of the 

 Royal Irish Academy,' on Ziphius Sowerbii, " cast ashore in 

 Brandon Bay, County of Kerry," Ireland. The specirjien, 

 like that found on the Elginshire coast, was a male ; it " was 

 about fifteen feet in length " (p. 7) ; the blow-hole was 

 crescentic, with the horns turned forward ; the mandibular 

 tooth entered a notch of a thick padding of fibro-cartilaginous 

 substance covering the alveolar border of that part of the 

 upper jaw ; it showed the usual sexual development and 

 specific position ; the summit of the crown was visible exter- 

 nally when the mouth was shut. Unfortunately the skin of 

 the throat, as to the presence or otherwise of folds, and the 

 fins, as to proportion, form, and position, were not subjects 

 of observation. 



male, fig. 



Ziphius Soiuerbii. 

 Physeter bidens, Sow. 

 {Mesodiodon Sowerbii, Duv.) 

 (Dioplodon Sowerbiensis, Gervais.) 

 {Diodon Sowerbii, Jardine and Bell.) 

 {Mesoplodon Sowerbiensis, Gervais.) 



5 



