14 ART. 4.— BASHFORD DEAN. 



indistinct ridges, which are arranged in a somewhat wavy pattern 

 near the base of the spine. 



The cartilaginous basal supports of the dorsal are about seventy in 

 number : they are similar in shape but are graded somewhat in size, 

 the foremost and hindmost being the smallest. The first element in 

 this series is inclined forward and is the only one in this position. 

 A similar series of cartilaginous elements support the dorsal lobe of the 

 caudal fin : of these first two are small and separate, but the next set, 

 thirty odd in number, follow in a graded series, compact, with tips 

 and bases apposed. Further caudad still the supporting elements 

 string along loosely, like neural spines. 



There is no anal fin. The ventral lobe of the caudal, however, is 

 of considerable size, and is closely set with dermal rays. Its basal 

 supports are first evident in a position much further caudal than one 

 would expect from the disposition of the dermal rays, and they are 

 altogether smaller and more delicate than one would naturally expect 

 from the size of the web of the fin. The first two elements of the row 

 are inconspicuous and — as an individual variation perhaps — are situated 

 at a considerable distance from the column ; the remainder, although 

 close to the column, are not firmly connected with it. One need 

 hardly add that in the urostyle no traces of haemal or neural elements 

 can be determined. 



Paired Fins and Girdles. PI. I, Fiff. 4. 



The cartilaginous supports of the pectoral fin occupy a great 

 extent of its entire surface, greater in proportion than in the case of 

 other chimaeroids. And the fin is in general a narrower one. About 

 the usual number of radialia are present, twenty-six rows in this 

 specimen, having the usual relations to basalia. A thick distal row 

 of cartilages, representing the terminal segments of corresponding 



