25 



fin and the lower lobe of the tail a row of imbricating scales, enlarged and ornamented similiarly 

 to those between the dorsal fin and upper lobe of the tail, also occur. Enlarged, longitudinally 

 striated scales are seen in a number of specimens, between the anal and ventral fins, and between 

 the latter and the pectorals, but whether these are disposed in a definite single row or not has 

 not been ascertained. In all the fins the rays are articulated, and their joints, though generally 

 smooth, are sometimes sculptured to a slight extent. This sculpture has been best observed 

 in the dorsal and anal fins of the type specimen. In the more anterior part of the fins, it consists 

 of a feeble oblique striation of the front margin of the joints, while more posteriorly their hind 

 margins develop minute serrations. 



In general proportions E. hrowni is moderately deep, the maximum depth of the trunk 

 being contained about three and three-quarters times in the total length, of which the head 

 occupies about one-fifth. The caudal pedicle is slender, its depth being about two-fifths of the 

 greatest depth of the trunk. In side view, the dorsal outline, moderately flat in advance of 

 the dorsal fin, descends rapidly near the head, which is rather short and obtusely pointed. The 

 depth of the trunk is much diminished between the dorsal and anal fins, the line of the base of 

 these fins being obhque to the longitudinal axis of the fish. The tail is deeply forked and the 

 upper lobe considerably exceeds the lower one in length. 



The mandibular suspensorium is apparently oblique. The teeth, as seen imperfectly in 

 one specimen only, seem to be arranged in two rows, after the manner of the genus, viz., with 

 small teeth in an outer row, and larger ones, at intervals, forming an inner row. In all 

 the specimens the head is unsatisfactorily preserved, and no definite statement can be made 

 regarding the shape and disposition of the bones. 



In the fins, the rays are articulated throughout except the most proximal part of the first 

 two or three rays of the pectoral. The dorsal fin, plate IV, fig. 2, is triangular, with a base 

 nearly equal to the length of the anterior border. The posterior margin is straight or slightly 

 concave and equals the base in length. As exhibited in the type specimen, plate I, fig. 2, and 

 plate IV, fig. 1, the rays, anteriorly and proximally are • 6 mm. broad, there being five rays in 

 a space of 3 mm. The joints are about 1 • 5 mm. long, that is, their length is about three times 

 their breadth, plate V, fig'. 5. Proximally, the rays along the whole length of the base decrease 

 but little, if at all," in thickness posteriorly The rays subdivide distally. They bear a longi- 

 tudinal striation or groove, which begins near the base and is at first superficial. This groove 

 deepens and becomes more decided near the mid-length of the fin, and culminates in a subdivi- 

 sion of the ray not far from the posterior margin of the fin. Distally a second, and apparently 

 also a third subdivision, may take place. The joints retain very much the same length distally, 

 as proximally, with the result that their length relative to their thickness is greatly increased 

 with each successive subdivision, in other words, they become more slender. On the front 

 border of many of the joints in the more anterior part of the fin, three or four slight, short stria- 

 tions are observed, directed upward and backward, obliquely to the longitudinal axis of the 

 rays. These particular markings are not observed in the posterior half of the fin, where another 

 style of ornamentation is developed, viz., a minute serration of the hinder border of the joints, 

 the serrations also pointing upward and backward, plate V, fig. 6. The fulcra along the anterior 

 9981—4 



