1867.] PROF. W. LILLJEBORG ON HALCROSIA AFZELII. "l.*) 



inches. 



Total length 43| 



Height under first dorsal 7 



Head, width at spout-holes. .5|- 



Eye-slit, length 2| 



, distance from snout 2| 



fi 



Spout-holes, length 4-^ 



Mouth, width = distance from snout .... 3f 



Pectorals, width of base 2 



, distance from snout 9^ 



First dorsal, length of base .5f 



—- , vertical height 2g 



Second dorsal, length of base Sg 



, vertical height 2| 



Ventrals, width of base If 



, distance from snout 27 



Caudal, length ' 9| 



7. Description of Halcrosia afzelii^, a new Crocodile fi'oni 

 Sierra Leone^ West Africa. By Wilhelm LilljeborGj 

 Professor of Zoology in the University of Upsala, 

 F.M.Z.S. 



Length from the point of the nose to the tip of the tail about 4' 

 (Swedish workmen's measuref, i. e. with 12 inches to the foot). 

 Length of the head from the os quadratum Zj" ; breadth of the 

 head at the back part 4:j" ; its length from the posterior extremity 

 of the under jaw S", from the orbits to the point of the nose 3|" ; 

 breadth of the nose over the ninth tooth, the widest part of the up|)er 

 jaw, 2^". Length of the tail 2'. The head's length in proportion 

 to its breadth marks it as a short broad form ; the nose is, however, 

 much narrower than in the Halcrosia frontata (Murray) J, as is evi- 

 dent by the proportion of the breadth above tbe ninth tooth to the 

 distance between the orbit and the tip of the nose, the former being 

 but about two-thirds of the latter. According to Murray's figure 

 this breadth amounts to three-fourths of the above-mentioned dis- 

 tance. With respect to the form of the nose, it appears to be in- 

 termediate between Halcrosia frontata and Crocodilus vulgaris. 

 The fossae supratemporales are small, and their lower openings 

 very small, situated in front, and directed outwards and forwards. 

 The supratemporal or sincipital plane is somewhat concave in the 

 middle, and the forehead between the orbits destitute of keel. 



* With this name we call to remembrance the late Professor Adam Afzeliiis 

 of Upsala, who brought home to Sweden from Sierra Leone this specimen, toge- 

 ther with many other interesting specimens of animals and vegetables. 



t" Swedish feet and (workmen's) inches are reduced to English by mulliplving 

 bv 0-9741, or dividing bv 10266. 

 ' I Gray, 1'. Z. S. 1862", p. 213. 



