igoi. Thompson. — fiisso's Dolphin. 89 



Dundee. Some teeth are missing, but there seem to have 

 been four on each side, or perhaps three on the left and four 

 on the right. The dentition of the species is very variable. 

 M. Richard describes, in the two specimens taken by the 

 Prince of Monaco, five teeth 011 the right side and four on the 

 left of a female from the Azores, and four teeth on the right 

 side and two on the left of the large male from the Mediter- 

 ranean. Every intermediate number from two teeth to six 

 appears to have been recorded, the individuals with the larger 

 number of teeth having been generally ascribed to G. rissoanus. 

 I may mention also, in parenthesis to this note, the fact 

 that we have in this Museum a skeleton of Laocnorhynchns 

 albirostris, Gray, the White-beaked Dolphin, which I obtained 

 some twelve years ago near the same spot where I found the 

 Grampus griscus. Dr. Scharff in his "I^ist of Irish Cetacea " 

 published last year, is able, I see, to record only one certain 

 and one somewhat doubtful instance of the occurrence of this 

 species in Ireland. 



University College, Dundee. 



ABNORMAL DENTITION IN THE DOG. 



BY PROF. RICHARD J. ANDERSON,. M.D. 



A small three-year-old terrier was shown to me some time 

 ago, because of the peculiarity of the dentition. It was of a 

 wire-haired, short-legged breed, and presented for examination 

 the following variety. Whilst the incisors of the upper jaw 

 were in range, and three on each side, those in the lower 

 jaw show only two on each side in range in front. Two 

 additional teeth appear behind the four, one on each side, so 

 as to suggest to a casual observer the existence of a double 

 row of teeth. The two posterior teeth appear to be inter- 

 mediate incisors, although the presence of additional teeth in 

 some animals in this region results from persistence of the 

 milk teeth. Several bears and their allies show receding 

 intermediate lower incisors, and this peculiarity is not con 

 fined to modern types. Several carnivores (e.g., seals) show a 

 fewer number than the normal. It is quite evident the 



A3 



