ADDITIONS AND CORRECTIONS. 401 



Tursio Abusalam (page 261), add to synonyms : — 



Delphinus hamatus, ''Hemp. SfEhrenh." Wiegmann, inSchreh. Sdugeth. 



18. t. 369 (skull) J Sclilegel, Abhandl.l 29. 

 D. Abusalam, Wagner, Schreb. Suppl. vii. 324. 



After TURSIO, (at page 267) add:— 



4*. SOTALIA. 



Beak depressed, rather longer than the brain-cavity. Palate flat. 

 Lower jaw rather broad behind ; symphyses short. Teeth slender, 

 conical. Pectoral fin obliquely truncated. Forearm-bones free ; 

 hand shorter than the arm. Caqial bones five, small, surrounded 

 by cartilage. Phalanges of the index finger six, of the middle 

 fijQger five, and the fourth finger one. 



1. Sotalia Guianeusis. 



Delphinus Guianensis, Van JSeneden. 

 Tursio Guianensis, Catal. 257. 



Inhab. British Guiana. Mus. Stuttgart. 



The skull differs greatly from that of D. microps, with which it 

 has been compared, in the length of the beak and the shortness of 

 the symphysis. 



" Ce dauphin presente dans la conformation de son squeletto 

 diverses particularites qui lui donnent nn certain interct. La co- 

 lonne vertebrale est tres-massive principalement a la region caudale ; 

 la nageoire pectorale est fort-etendue en largeur. La tote a un 

 aspect a part, surtout par la conformation du maxillaire inferieiir." 



" Vertebra3 55 : thoracic 12, lumbar 14, caudal 22, cervical 7. The 

 first two cervical are united, the five others are free and have long 

 bodies, making a long neck, as in the Platanistce, which have a 

 simUar-shaped pectoral. The caudal vertebrae form two distinct 

 series, the first thirteen have large bodies, and are much higher 

 than broad ; the first nine have the upper spinous apophyses weU 

 developed ; and the first seven have transverse processes ; the twelve 

 chevron bones are very strong ; the last nine caudal vertebrae are 

 much depressed, and twice as broad as high. Bibs 12 . 12 : the first 

 rather the broadest, the first four only have a double articular sur- 

 face, the first five are articulated directly to the sternum. The 

 sternum is formed of three distinct bones, the front being the largest. 

 The pectoral fin is only rather longer than broad, and is not so long 

 as the arm -bones united ; the bladebone is much extended in form, 

 and has the acromion and coracoid weU developed. The two bones 

 of the forearm are rather longer than the humerus. The radius is 

 very broad. Carpal bones five, in two rows, the three upper being 

 the largest ; metacarpals five. There is no phalange for the thumb, 

 only one for the little finger, six for the index, and four for the ring 

 finger. 



'* The skull is rounded on all sides, the falx is ossified, the face is 

 slender, the nasal canal open, the vomer is shown above between the 



2d 



