ADDITIONS AND CORKECIIONS. 



395 



Steno Tucuxi, (at page 237) add :— 

 Freshwater Dolphin, St6noTucuxi,TheTuouxi,^ofeg,^wazom«,i.l46. 



It rises horizontally, draws in an inspiration, and then dives 

 down head foremost, which distinguishes it from the Bouto. 



" I saw here, for the first time, the flesh-coloured Dolphin {D.pal- 

 lidus, Gervais) in the Lower Amazons, rolling away in pairs, both 

 being of the same colour." — Bates, op. cit. i. 303. 



" The pale flesh-coloured species (D. palUdus, Gervais) is also 

 abundant in the Upper Amazons." — Bates, op. cit. i. 146. 



Belphinus pseudodelpTiis (Wiegmann, Schreb. Saugeth. t. 358; 

 Wagner, Schreb. Supp. vii. 332) appears to be a Steno with smaU 

 teeth. The beak is figured near once and a half the length of the 

 brain-case, and the teeth 42 . 45. 



DELPHINUS (page 239). 

 Add to generic characters : — 



The fin moderate-sized, falciform, pointed at the end ; the hand of 

 the same length as the arm-bones ; the forearm-bones close together ; 

 the carpal bones forming a mosaic, separated by thin cartilage ; the 

 index fi.nger of six phalanges. — Van Bramheke, Mem. Ac. Belg. xviii. 

 1. 1. f. 3. 



The first and second cervical vertebrae united by the bodies and 

 spinous processes of the neural arch, which is very much elongated 

 and keeled above. The lateral processes of the first medial, broad, 

 short, obliquely compressed. Hiader vertebrae thin. 



Fig. 98. 



Skull of DelpMnws. 



1. DelpMnus microps (p. 240). Correct specific characters to : — 



Beak of skull nearly twice as long as (that is to say, once and 

 three-fourths the length of) the brain-cavity, and three times and 

 three-fourths as long as wide at the notch. Teeth six in an inch. 



This is the description of the skull, which is the type, figured in the 

 ' Voyage of the Erebus and Terror,' t. 25 ; a. of this Catalogue. 



SkuU very like B. Alope, but head smaller and more globular, and 

 beak much more slender. 



