256 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



the second dorsal, and perhaps the rays are a trifle longer than those of the sub- 

 caudal, which fin extends much farther forward and backward than the supra- 

 caudal. A deep notch not quite reaching the inner edge of the fin separates the 

 second dorsal from the supracaudal, and immediately behind this notch there is a 

 portion of the supracaudal, in the individual under description, which rises in 

 a sharp point followed again by a sharp notch not half the depth of the fin. It may 

 be this point is a mere variation in this specimen. The caudal filament is of 

 medium length ; it is apparently complete. There is no separate anal fin. As in 

 C. affinis, the pectoral does not reach the ventral ; it is broader and less narrowed 

 toward the end than in C. monstrosa. 



Lateral Line System. — One respect in which this species differs from other 

 Chimaerae is seen in the aural section of the lateral line system. Ou others the 

 aural makes an angle backward in the middle and from this angle sends back 

 a short line toward the dorsal spine ; on the present specimen the line makes a 

 curve across the aural region and has neither the angle nor the line extending 

 backward. It is like that of the Callorhynchus figured in the article on the lateral 

 system, Garman, 18S8, Bull. M. C. Z., 17, Plates 3 and 4, and is unlike the aural 

 of Chimaera monstrosa, as figured on Plate 2 of the same article, or of the other 

 species of the genus. The lateral line on the flank starts from the junction of the 

 occipital and the orbital in a short descending curve, behind which it rises to curve 

 in the opposite direction, making a sigmoid from which it takes a nearly straight 

 course backward to descend to the lower edge of the muscular bands of the tail 

 below the anterior portion of the supracaudal fin. The jugular and the oral por- 

 tions of the line are separated by a short space at their junction with the orbital. 

 The oral makes a decided curve backward below the orbital above the angular, and 

 another below it ; in other Chimaeras the oral is more nearly straight. The out- 

 ward curve in each cranial is farther forward than on C. phantasma, that is, farther 

 from the aural junction, and the oral curves are more pronounced. The great 

 curve, in front of the eye, in the suborbital, is more open than that of C. phantasma, 

 more nearly resembling that of C. mitsukurii; it does not make so great a turn 

 backward before passing forward to meet the rostral. 



The back is dark brown or blackish, shading to light on the lower portions of 

 the flanks, and is marked by white spots : a small spot of white in front of each 

 eye, another behind each orbit, one on each shoulder below the base of the dorsal 

 spine above the lateral line, a larger one below the hinder extremity of the first 

 dorsal, one below the anterior portion of the second dorsal, and another below the 

 lateral line above the base of each ventral fin. Anteriorly the white spots are 

 about the size of the pupil ; posteriorly they are larger. Slight cloudings in the 

 brown on the lower parts of the sides may or may not be due to accidents in 

 preservation. 



Type Cat. 1281 M. C. Z., from Aomori, near Tsugaru Strait, Japan. 



Named in honor of Mr. Thomas Barbour, through whose enthusiastic interest 

 the opportunity of description was provided. 



