346 DESCRIPTION OF A SQUALUS. 



destitute of wrinkles, the appendices which accom- 

 pany the ventral fins are rugose and transversely 

 wrinkled on their superior part, and longitudinally 

 wrinkled on the middle; these wrinkles are more pro- 

 found than those of the skin of the hody. Head very 

 small ; rostrum very short, obtuse, glabrous, covered 

 with mucous pores of different sizes, the largest ci- 

 liated at their interior circumference and placed be- 

 fore the eyes, the middle sized ones irregularly dis- 

 posed, covering the upper part and sides of the ros- 

 trum, the small ones are arranged on a line which 

 passes above the eyes and is prolonged in front of the 

 rostrum; eyes, these being replaced by a hollow 

 hemisphere of glass filled with plaister, with a round 

 black spot in the middle, I was unable to ascertain 

 their true form and dimensions ; they are at the dis- 

 tance of about 6| inches from the tip of the rostrum, 

 and very near to the margin of the superior lip ; nos- 

 trils placed before the eyes and beneath the rostrum, 

 but having been distended with cylinders of wood, 

 their form cannot be determined ; spiracles very 

 small, placed above and a little behind the angle 

 of the jaw, each corresponding with a long interior 

 opening in the mouth betweeu the superior jaw and 

 the first branchial opening; branchial apertures, five 

 on each side, the anterior ones the largest, extending 

 from the superior part of the neck to the under part 

 of the breast, where they appear confluent with those 

 of the opposite side, the posterior opening smallest; 

 the space between the first pair on the upper part of 



