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Bashford Dean Memorial Volume 



due to projecting firi'rays, but it is really what Garman (1885.2, p. 3) calls an "armature" 

 comparable to that found anterior to, and on the upper (free) edge of, the dorsal fin. This 

 "armature" on dorsal and caudal is explained by Garman (1885.2, p. 7) as follows: 

 The upper edge of the tail and its posterior border, to the lateral line, are armed by a sharp 

 edge of scales. The edge is formed of two rows — one from each side — of broad, thin, sub- 

 quadrangular scales, which have met on the median line and become so closely applied as 

 to appear a single ridge. Each scale entering into the construction of the edging is opposed to 

 two others, in this manner imbricating or breaking joints [our Text-figure 23). . . . Similar 

 scales guard the front or upper edge of the dorsal. 



This description fits our adult fish save as to the matter of the abbreviated posterior 

 border of the tail at the end of the lateral line. Here the healing of the wound in Garman's 

 specimen had brought the scales across the stump. In our three specimens the tails are fairly 

 complete and the imbricating scales ("armature") of the caudal fin grow smaller toward 

 the posterior end and finally disappear entirely. For the last three or four inches of the 

 tail, the dorsal edge of the caudal fin is made up of the fine dermal fin-rays held together by 

 the membrane of the fin. There are still scales on the sides of the fin. 



Garman (1884.1, 1885.2) shows (our Text- 

 figure 1, and Figure 16, plate V) a mutilated 

 tail-fin with the ventral lobe deeper anteriorly, 

 diminishing only very gradually and ending in a 

 fine point below the tip of the solid part of the 

 fin. Giinther (1887) shows a large ventral lobe, 

 deepest anteriorly, where it begins above the tip 

 of the anal, and becomes gradually lower to the 

 tip of the tail where it is confluent with the dor- 

 sal lobe (our Plate I, figure 1). In this ventral 

 lobe the fin-rays are plainly visible, as they are 

 in one of Garman's drawings. 

 Of the three figures reproduced from photographs of Chlamydoselachus, Collett's 

 (Figure 3, plate I) is the largest and clearest. Here the tail-fin, although somewhat dried 

 and wrinkled, has a gentle upward bend like that portrayed by Garman. On the dorsal 

 surface is found the remnant of the narrow dorsal fin-lobe. The ventral lobe is deep in 

 front and tapers backward toward the end of the tail. The fin-rays are quite apparent in 

 this lobe. 



Of Iberian fish, Bolivar's photograph (1907), shown herein as Figure 4, plate I, was 

 made from a badly shrivelled specimen. In general the tail is similar to that in Gcinther's 

 figure. Bertrand (1926) reproduces a photograph of his apparently fresh specimen (see 

 Figure 5, plate II herein). The tail of this fish is very much like that of Gijnther's speci' 

 men — apparently straight. The tail is either especially posed that way or appears straight 

 because this heavy-bodied fish has the trunk rotated away from the camera in such fashion 

 as to straighten the tail. This we judge from the high position and the curvature of both 

 the lateral line and the crease marking the upper limit of the abdomen. 



Text-figure 23 

 The scales (x5) from the upper part of the 

 caudal fin. Note the imbrication of the large 

 scales on the edge to form the "armature." 



After Garman, 1885.2. 



