Fishes of the Western North Atlantic 



297 



Trunk rather slender, its height at origin of ist dorsal (where highest) about V& 

 of length to origin of caudal. No mid-dorsal ridge. Body sector to cloaca about as long as 

 tail sector. Caudal peduncle about % to % as thick as deep. Upper and lower precaudal 

 pits well developed as triangular furrows, the upper the larger. Dermal denticles very 

 small (aver. 0.17 x 0.17 mm. in specimen 610 mm. long), close-spaced, usually overlap- 

 ping, their blades about as broad as long, usually with 5, but sometimes with only 3, low 

 keels, their posterior margins with as many teeth, the median somewhat the longest, on 

 short pedicels. 



Head (to 5th gill opening) a little less than V4 of total length, its dorsal profile only 

 slightly convex. Snout flattened above and rather thin toward tip, varying in shape from 

 broadly to more narrowly ovate, its length, in front of a line connecting inner corners of 

 nostrils, also varying from a little shorter than the distance between the inner ends of the 

 latter to nearly i V2 times that long." Eye nearly circular, its anterior edge a little posterior 

 to front of mouth, or nearly opposite latter, its diameter nearly or quite V2 as long as dis- 

 tance between inner corners of nostrils. Gill openings evenly spaced, the 3rd (slightly 

 longest) a very little longer than diameter of eye, the 5th slightly the shortest, the 4th 

 above origin of pectoral. Nostril strongly oblique, its inner corner varying with length of 

 snout from a little less to a little more than V2 as far from front of mouth as from tip 



Figure 50. ScoUodon terrae-novae, illustrated in Fig. 49. A Dermal denticles, about 22 x. B Apical view 

 of dermal denticle, about 70 x. C Upper and lower teeth, left-hand side, about 3 x. Z) Fourth upper tooth. 

 E Tenth upper tooth. F Fourth lower tooth. G Eighth lower tooth. D-G, about 6 x. 



5. For further comments on this variation,. as regards the relationship of the supposedly long, narrow-mouthed form 

 Ulandii to the shorter, broader-snouted terrae-novae, see remarks, p. 199. 



