8426 The Zoologist — March, 1873. 



the notch. Nasal triangle elongate. Symphysis of the lower jaw 

 short. 



iv. Electra. — The beak of the skull very flat above, with the 

 edges in front of the notches bent up. Teeth-line slopping con- 

 siderably short of the notch. 



1. Electra ac?//a (Eschricht's Dolphin). Delphinits acuta, Gray, 

 Zool. Ereb. & Terror. Delphinus Eschrichtii, Schlegel, Abhand. 

 tab. i. and lab. ii. fig. 5. — Beak of the skull rather longer (about 

 one-lhird) than the length of the brain-case. Teeth moderate, four 

 in an inch, those of the lower jaw ralher larger. Inhabits North 

 Sea. Orkneys; Brook. Faeroe Islands ; Schlegel. Skull in Mus. 

 Leyden. 



V. Leucopleurus. — Beak of the skull rather flat above and 

 elongate, bent up on the edge in front of the notch, narrow behind, 

 as long a?, or slightly longer than, the length of the brain-case. 

 Teeth-line reaching nearly to the notch. Teeth small, five in an 

 inch. First and second cervical vertebrae united bv their bodies ; 

 third and fourth by the spinous processes. Vertebrae 81: c. 7 ; 

 d. 15; 1. and c. 59. 



1. Leucopleurus arcticus (White-sided Bottle-nose). Gray, 

 Synopsis of Seals and Wliales, tab. xii. (skull). X. leucopleurus, 

 Gray, Zool. Ereb. & Terror, tab. xii. — Inhabits North Sea. Orkney; 

 Knox, 1835. 



vi. Lagenorhtnchus. — Beak of the skull rather flat above, bent 

 up on the edges in front of the notch, deep, broad behind, rather 

 shorter than the length of the brain-case. Teeth-line reaching 

 nearly to the notch, large, three in an inch. First and second 

 cervical vertebrae united by their bodies ; the third, fourth, fifth, 

 sixth and seventh free. 



1. Lagenorhyuchus albirostris (White-beaked Bottle-nose). 

 Delphinus tursio, Brightwell, Ann. & Mag. N. H., 1846, t. 2. — 

 Inhabits North Seas. Yarmouth, 1846; Brightwell {slieleton in 

 Brit. Mus). Faeroe Islands ; Schlegel. 



Tribe III. Pseudorcaina. — Head rounded in front, very convex, 

 not beaked. Teeth conical. Beak of the skull depressed, broad, 

 scarcely so long as the brain-cavity. 



vii. Pseudorca. — Head rounded, convex; body moderate; dorsal 



