ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 397 



Disk very broad, the outer aaujles of pectorals behind its middle. Anterior profile 

 convex opposite the orbits, strongly concave both in front of and behind this region. 

 Interorbital space deeply concave, the cranial cartilage apparently thin and weak. 

 Teeth, 31-31. Claspers very long and slender, dilated distally, everywhere so readily 

 flexible as to be easily bent at an acute angle. A wide lateral Ibid along either side 

 of tail. Dorsals verj^ high and near together; caudal fold but little higher than the 

 lateral ones, with which it becomes conflueut at tip of tail. 



The following table of measurements in millimeters will give the projiortions of the 

 type: 



Greatest width of disk 730 ' Distance from tip of snout to front of eye 185 



Width at front of eyes 185 ] Distance between eyes 60 



Tip of snout to axilOf pectoral 570 | Width of spiracles 33 



Axil of pectoral to axil of ventral 125 I Diameter of eye 33 



Axil of ventral to tip of tail 655 



Origin of first dorsal to tip of tail 148 



Base of first dorsal 48 



Oblique heij;ht of first dorsal 45 



Distance between dorsals 13 



Base of second dorsal 46 



Length of claspers 255 



Distance from tip of snout to outer pectoral 



angle 555 



Distance from snout to front of upper jaw. . . 190 



Distance from snout to nostril 158 



Distance between outer edges of nasal flaps.. 103 



Width of mouth 105 



Distance from snout to first branchial slit 310 



Distance from first to fifth slits 112 



Distance between inner edges of first slits. .. 212 

 Distance between inner edges of fifth slits. . . 133 

 Distance from snout to vent 610 



6. Raja aleutica sp. nov. (Plate 21.) 



A single young male specimeu, 83.5 mm. long, from station 3257, north of Sannak 

 Pass, Aleutian Inlands; taken at a depth of 81 fathoms. 



Closely related to I!, stellulafa and E.parmifera. but reaching a much larger size than 

 either, and having the disk everywhere uniformly covered above with very tine close- 

 set stellate prickles very much finer and more numerous than in either species. The 

 species agrees with li. parmifvra and diliers from It. sfellnlafa in having the median 

 spines iu an uninterrupted series. They are 34 in number and extend from just 

 behind the occiput to the dorsal fin. Two strong spines on the shoulder; orbital 

 rim without spines or enlarged prickles; a wide band of coarser prickles on each 

 side of tail; the extreme margin of disk and the greater part of ventral fins naked ; 

 under parts without spines or prickles. 



The disk is not so wide as in R. stdlulata, and the snout is longer and narrower. 

 The anterior margin is gently concave toward outer angle and gently convex in front, 

 the rostral angle being about 90^, the extreme tip forming a slightly projecting 

 rounded lobe. The cranium is abruptly constricted in front of nostrils, as in R. 

 abyssicola, leaving a slender flexible cartilaginous rod extending to tip of snout. In 

 the present species the space between tlie rostral cartilage and the base of the 

 rostral i>ortion of pectoral Jin is membranous and lighter in color than the rest of the 

 disk. Interorbital space deeply concave, its width 3i in length of snout, the latter 

 2| in distance from tip of snout to axil of pectorals. Spiracles narrow, i diameter 

 of eye. Distance from tip of snout to Iront of mouth 2| in distance from tip of snout 

 to vent; the latter equals the length of tail. Teeth ff. Claspers not reaching 

 margin of ventrals; pectoral hooks not developed. Color, brown above, with large, 

 obscure, dusky blotches; white below; the edges of disk, the anal area, and the 

 under side of the tail In'own. 



This si^ecies evidently reai'hes a very large size. The following is a description of 

 a specimen 4 feet across, taken at station 3223, and supposed to belong to the same 

 species. The specimen was too large for preservation. 



Snout long but very broad, thus appearing short and blunt, as in R.siellulata, the 

 rostral angle being about 100°, the extreme tip of snout projecting. Anterior 

 lateral x^rofile of disk convex, becoming strongly concave posteriorly near angle. 

 Interorbital width (of cartilage) one-third length of snout measured from its tip to 

 a line joining front of orbits. Interorbital area strongly concave. Eye a trifle less 

 than length of spiracle, one-half interorbital width. No elevated supraocular rim. 

 Length of snout (as above defined) a trifle more than half its greatest width. 



