Dr. R. H. Traquair — New Fish Remains from Borough Lee. 545 



which follow a direction on the whole similar to that in Strepsodus 

 sauroides, Binney, sp., that is, while parallel with the direction of 

 the lower part of the tooth, they do not follow the apical flexure, but 

 pass vertically upwards nearly irrespective of it till cut off at the 

 external smooth marginal area ; these striae are frequently bifurcated 

 and intercalated. 



My collection contains seven of these peculiar teeth, which differ 

 slightly among themselves as to the degree of slenderness of their 

 contour, amount of compression of the shaft, and extent of surface 

 covered by strise. I refer them, provisionally, to the genus Strepsodus 

 on account of the pattern of their striation, and their compressed 

 form, but they differ materially from the teeth of S. sauroides in 

 the apex being scarcely geniculated or recurved, and also in the 

 much greater fineness of the strice. 



Professor Young, in his description of S. sauroides, speaks of the 

 smooth margin of the tooth as "anterior." But in well-preserved 

 jaws of that species it may easily be seen that the great curvature of 

 the tooth is inwards, not backwards, — the smooth margin is therefore 

 external. 



Elonichtliys pectinatus, Traq. 

 Elonichtliys pectinatus, Traq., Proc. E. Soc. Edin. 1876-1877, p. 430 ; and 

 Proc. K. Phys. Soc. Ediu. 1879, pp. 113-128. 



This magnificent Palfeoniscid was originally described by me from 

 rather fragmentary material from other localities : recently I have 

 had the good fortune to obtain a specimen from Borough Lee, which 

 shows the contour of the fish, though the greater part of the head is 

 lost, and only part of the caudal fin remains. The total length of 

 the specimen, as it now exists, is 16 inches. There can be no doubt 

 that when perfect it must have measured at least 2 feet ; but even 

 this is small when compared with the size of specimens from other 

 localities, whose length I have estimated, from their fragments, at 

 from 3 to 4 feet. The depth of the present specimen, in front of the 

 dorsal fin, is 4|- inches. , 



The scales agree in every respect with those which I have 

 previously described as characteristic of the species. They are of 

 moderate size, compared with the dimensions of the fish ; the 

 exposed area of those on the front of the flank being about \ 

 inch in height, by \ in breadth. The great interest of the spe- 

 cimen lies in the view which it affords of the general propor- 

 tions of the fish, and the form and disposition of the fins. The 

 shape is somewhat deeply fusiform, but from the deficiency at both 

 extremities, fuller details as to proportions are impracticable. The 

 pectoral fin is not shown in its entirety, its extremity being some- 

 what crumpled up, though it is clearly seen that its principal rays 

 were unarticulated for about one-third of their length. The ventrals 

 are placed midway between the pectoral and anal, and are composed 

 of numerous rays, divided by articulations, which are at first distant 

 enough to cause the joints to be rather longer than broad, though 

 distally, where the rays dichotomise, they become closer. The 

 dorsal commences opposite the middle of the space between the 



DECADE II. — VOL. IX. — NO. XII. 35 



