500 DR W. S. BRUCE 



" Glcibiocephalus melas, Traill. (PI. xl. figs. 1 and 2.) 



" Si/.e large ; form stout. Head globose ; forehead protuberant, overhanging the 

 lip in adult individuals ; body especially deep opposite the dorsal fin. Pectoral fins 

 very long, slender, and pointed ; length about one-fifth the total length of the body. 

 Dorsal fin on a long base and strongly recumbent, situated anterior to the middle of 

 the length of the body. Caudal ridges prominent, extending respectively to the 

 dorsal fin and to the vent. Flukes large and broad. Mouth oblique. 



" General colour uniform black ; a large hastate white area on the breast, extending 

 from the line of the corners of the mouth to the base of the pectoral fins; from 

 behind this area a white baud, which is much the broadest in the posterior half, 

 extends backwards along the median line to the vent ; the whole white area has the 

 general form of an arrow with its head, shaft, and feathers. 



"Teeth-. Vertebrae : C. 7 ; D. 11; L. 13(-14) ; Ca. 27(-29) = 58-60. Skull 



large and massive. Rostrum longer than broad at the base ; its breadth at the base 

 slightly less than three-fourths its length. Intermaxillfe large and fiat; not greatly 

 broader anteriorly than posteriorly ; rugose in front ; their outer margins not 

 coinciding with the margins of the maxilla 1 , except at the extremity of the rostrum ; 

 separated in the median line throughout. Superior uares broad transversely, and 

 bordered by narrow plates of the intermaxillae. Vomer extending nearly to the 

 extremity of the rostrum. Pterygoid bones large, obtusely keeled, and closely 

 approximated in the median line. Temporal fossse moderate, oval. 



" Measurements of the Exterior (from Bell). Total length, 182 inches (462'3 cm.) ; 

 extremity of snout to corner of mouth, 14'5 inches (36'8 cm.) ; to dorsal fin, 55 inches 

 (1397 cm.) ; length of pectoral fin along anterior edge, 50 inches (L27 cm.) ; greatest 

 breadth of pectoral fin, 11 inches (27'9 cm.). 



' M<'< inurements of the Skidl (U.S. National Museum, No. 12,100, Cape Cod, 

 Massachusetts). Total length, 655 cm. ; length of rostrum, 33'4 cm. ; breadth of 

 rostrum at base, 24'1 cm. ; at its middle, 19'4 cm. ; breadth of intermaxillse at same 

 point, 15 '4 cm. ; breadth between orbits, 42'3 cm. ; length of temporal fossa, 17 '3 cm. 



" Habitat. Atlantic coast of North America to New Jersey ; coast of Europe ; 

 Cape of Good Hope ; New Zealand." 



THE PIEBALD PORPOISE (Lagenorhynchus cruciger ?). 



Considerable interest attaches to the porpoise * seen several times by myself on 

 Imard the JBal&na in 1892 and 1893 in the vicinity of the Falkland Islands, and 

 seen again in 1903 and 1904 by the other naturalists of the Scotia and myself in 

 this locality, the same probably as a school of porpoises that the Scotia fell in with 



* This porpoise was called a "ground porpoise" by the crew of the Balscna. 



