304 



TRACHYPTEEID^. 



Regalecua maculatus, Nardo, Giorn. di Fis. dec. ii. torn. vii. p. 116. 



pi 1. fig. 1. 

 Trachypterus iris, Cuv. 8f Vol. x. p. 341. pi. 297. 



B. 6. D. 6 I 170. A. 0. C. 8/6. P. 11. V. 1/7. 



The greatest height of the body is at or near the occiput, and one- 

 ninth or one-tenth of the total length. Dorsal rays rough. In every 

 other respect similar to T. tcenia. 



Coasts of Messina and Corsica. 



Typical specimens two to three feet long. 



7. Trachypterus liopterus. 



.'' Bogmarus aristotelis, Risso, Eur. Merid. iii. p. 297. 

 Trachypterus leiopterus, Cuv. 8f Val. x. p. 342. 



D. 6 I 170-174. A. 0. C. 8/6. V. 1/7. Vert. 90-91. 



The height of the body is one-ninth or one-tenth of the total 

 length. Dorsal rays without any asperities. Two spots only on 

 the back, the anterior of which is situated in the first sixth of the 

 total length, the posterior in the second. In every other respect 

 similar to T. tuinia. 



Coasts of Naples, Nice, and Toulon. 



Typical specimens forty to forty-five inches long. One of the 

 specimens examined was a female. 



Pyloric appendages innumerable ; air-bladder none. 



a. Fifty-eight inches long : stuffed. Mediterranean. 



8. Trachypterus riippellii. 

 D. 6 I 135. A. 0. C. 8. V. ? P. 10. 



The height of the body is contained eight times and a half in the 

 total length. Dorsal rays smooth ; lateral Hne spiny ; a black spot 

 on the anterior half of the body. 



The form of the head is nearly the same as in T. tamia. The 

 greatest depth of the body is somewhat before the middle of the total 

 length, and is contained eight times and a half in it. Four pointed 

 teeth, iQclined backwards, on each side of the upper and lower jaws : 

 the vomer forms a projecting protuberance within the cavity of the 

 mouth, and is armed anteriorly with two teeth pointing backwards, 

 one of which is considerably larger than the other. Similar teeth on 

 the upper and lower pharyngeal bones, the latter being narrow and 

 having only a single series of teeth. Palatine bones entirely smooth. 

 The dorsal spines are perfectly smooth, those in the middle being not 

 quite one-half the depth of the body. The caudal fin is composed 

 of eight rays, the outer ones being the strongest : the fin is so joined 

 to the last vertebra that motion in any direction is possible* : there 



* It is a true caudal fin, the longitudinal axis of which is identical with that 

 of the laat vertebra ; I cannot therefore agree with Kner, who is inclined to con- 

 sider this fin ae a terminal dorsal fin (Wien. Sitzungsber. 1859, xxxiv. p. 439). 



