540 Memoir Sears Foundation for Marine Research 



Second dorsal fin: length of base 59.5, 59.0. 



Upper caudal fin :''^ length of base to last horny ray 17.1, 13.4. 



Pectoral fin: length 33.9, 28.3; breadth 13.8, 14.4. 



Distance from snout to: origin of dorsal spine 20.5, 22.6; 2nd dorsal 38.9, 41.3; 



pectoral 21.8, 22.4; pelvics 49.2, 52.8. 

 Distance from origin to origin of: pectorals and pelvics 30.1, 31.1. 



Trunk about as high opposite dorsal spine (where highest) as distance from tip 

 of snout to origins of pectorals, about 2/3 as high close behind pelvics, tapering evenly 

 thence rearward; strongly compressed laterally posterior to head, its sides almost flat, 

 its thickness a little less than half as great as its height opposite bases of pectoral fins 

 and only about Vs as great as its height opposite bases of pelvic fins. 



Skin perfectly naked on adults, except for claspers and tenacula of males (see 

 Description, p. 543), but closely pock-marked with a great number of rounded depres- 

 sions of different sizes on top and on upper sides of head abreast of mouth and nostrils. 



Lateral mucous canal in a series of low irregular waves along flanks, descending 

 at origin of caudal fin to follow out along lower edge of caudal axis as in Chimaera; 

 junction of cranial canal with aural canal a little more acute than a right angle; anterior 

 course of cranial canal nearly straight, not looping downward in front of eye; jugular 

 and oral canals running downward from suborbital as a joint canal for some distance 

 before separating. About 10 medium-size pores close in front of occipital canal; about 

 5-6 pores in area bounded by suborbital and joint oral-jugular canals ; about 8 large 

 openings along angular canal to front of snout; a double row of about 6-7 irregular 

 pairs of small pores parallel to descending oral branch and close in front of it; about 

 8-9 large openings along anterior part of suborbital canal from its descending wave to 

 front of snout; jugular canal continued downward onto throat as a series of short slits 

 as in Chimaera. 



Head about 2i-22''/o of length of trunk to upper origin of caudal fin. Snout low- 

 conical with blunt tip." Eye oval, sloping a little rearward, its horizontal diameter 

 about 1. 2-1. 3 times its vertical diameter; distance from tip of snout to front of eye 

 about half of length of head to origin of pectorals; pupil a little less than half vertical 

 diameter of eye; height of eye about 1/5 (21 "/o) of height of head, its length about Vs 

 (2 1-22"/ 0) of length of head to origin of pectorals. Gill openings about half as long as 

 distance from tip of snout to front of eye, the distance across throat between their lower 

 ends about as long as eye. Fold across throat strongly marked, as in Chimaera cubana 

 (p. 529). Groove around nostrils on lower side of head only faintly distinguishable on 

 specimens seen. Exposed subdivision of nostrils oval or quadrate with rounded corners, 

 about twice as long as broad, its length about 30 "/o as great as length of eye; distance 

 from its own rear edge to free edge of upper lip about as long as its own length. Width 



78. The point of origin of the lower caudal fin is not evident. 



79. The illustration by Goode and Bean (Smithson. Contr. Knowl., 31, 1895: pi. 10, fig. 32), which has been copied 

 repeatedly, shows the snout as more contracted than it is on our specimens. 



