300 Ayres"* Descriptions of 



eths in height, trapezoidal in form. The anal arises nine 

 twentieths of an inch posterior to the origin of the dorsal, is 

 similar to that fin in shape, one fourth of an inch in length, 

 eleven twentieths in height. The ventrals arising six tenths 

 of an inch anterior to the origin of the anal, are three twen- 

 tieths of an inch in length, half an inch in height, rounded. 

 The pectorals are situated very low down, almost beneath the 

 body ; their origin is opposite to the termination of the oper- 

 culum, they are eleven twentieths of an inch in height, three 

 twentieths in length, rounded. The caudal fin is beautifully 

 lunated, being six tenths of an inch in height at the extremi- 

 ties, three tenths in the height of the central rays. 



Branchial rays three, flat and broad. 

 ^ Fin rays, D. 10 ; A. 8 ; V. 9 ; P. 16 ; C. 19. 



The abdominal anatomy bears a striking resemblance to 

 that of L. pulchelhis, Storer. The stomach differs from the 

 other parts of the alimentary canal only in being a little 

 larger ; it diminishes very gradually as it passes backward 

 rather more than half the length of the abdomen, and termi- 

 nates at a tolerably well defined pylorus. From the pylorus 

 the canal is reflexed and extending forward almost to the an- 

 terior extremity of the abdominal cavity it turns backward 

 and proceeds straight to the anus. Its size from the pylorus 

 is nearly uniform. Cceca none. 



The liver is unequally divided into three lobes. The first, 

 which is largest, is situated on the right side ; the second lies 

 beneath the folds of the intestinal canal, and is longer than 

 the first but more slender ; the third, which is short, is on the 

 left side. 



The air-bladder is double, being divided by a transverse 

 stricture so that it appears formed of two sacs united by a 

 slender neck ; the posterior division is much the larger. From 

 the anterior part of this latter division proceeds a slender tube 

 which enters the aesophagus, thus forming a communication 

 with the external air. 



The ovaries in the female are double, oval in form, occupy- 

 ing, when fully developed, nearly the whole length of the ab- 



