72 CETACEA. 



marked; there is no median groove, and it does not diminish in 

 width to any great extent bet ween its root and the median gibbosity. 

 The rostrum is somewhat shorter than in M. lonyirostris. 

 Hob. Europe (England and Italy 1 ). 



27439. The cranial rostrum, imperfect anteriorly ; from the Red 

 (Fig.) Crag of Suffolk. This specimen is the type, and is figured 



by Owen in the ' Crag Cetacea ' (Mon. Pal. Soo.), pi. ii. 



fig. 2, and pi. iii. fig. 3. Purchased, 1851. 



39003. The hinder two thirds of the cranial rostrum ; from the 

 Eed Crag of Eelixstowe, Suffolk. 



BowerbanTc Collection. Purchased, 1865. 



It. 3562. Cast of the complete cranial rostrum. The original is 

 from the Red Crag of Shotley, Suffolk, and is preserved 

 in the Norwich Museum ; it agrees precisely with the 

 type specimen. Purchased. 



Mesoplodon angustus (Owen 2 ). 

 Syn. Ziphius angustns, Owen 3 . 



Dioplodon angustus, Gervais 4 . 



This species is allied to M. gibbus, but distinguished by the 

 narrower mesethmoid band, the greater constriction of the latter 

 between its root and the gibbosity, and the smaller size and more 

 anterior position of the gibbosity itself; a median groove is some- 

 times present. 



Hob. Europe (England). 



M. 3561. The cranial rostrum, imperfect anteriorly ; from the Red 

 (Fig.) Crag of Suffolk. This is the type specimen, and is figured 



by Owen in the ' Crag Cetacea ' (Mon. Pal. Soc.), pi. iii. 



figs. 1,2. No history. 



30273. The cranial rostrum ; from the Red Crag of Felixstowe, 

 Suffolk. This specimen, which is imperfect anteriorly, 

 agrees very closely with the type. Purchased, 1855. 



49662. The cranial rostrum, wanting the extremity and much 

 perforated by mollusks ; from the Red Crag of Woodbridge, 

 Suffolk. This specimen also agrees with the type in 

 general characters, but shows a median mesethmoid groove. 



Purchased, 1879. 



1 See Capellini, Mem. Ac. Sci. 1st. Bologna, ser. 4, vol. vi. p. 295 (1885). 



* Crag Cetacea (Mon. Pal. Soc.), p. 19 (1870). Ziphius. 3 Loc. cit. 



* Osteographie des Cetaces, p. 422 (1868-79). 



