NATURAL SCIENCES OP PHILADELPHIA. 141 



nearly under the posterior nostril. The four canine front teeth of the upper 

 jaw are conoid, and of nearly equal size, the two median curved slightly for- 

 wards, and the external downwards and sideways ; the four of the lower jaw have 

 nearly the same inclination forwards ; the two median are aubot half as long as the 

 external, contiguous to them, and themselves inclining towards each other. Behind 

 the canine teeth are small granular ones. 



The acuminated dorsal and anal fins increase in length with the age of the 

 fish, and in the adult the former extends nearly to, and the latter beyond the 

 median caudal rays, while the external rays of the caudal are twice as long as 

 tbe median. The ventrals of the adult are also elongated, and extend to the 

 third anal spine. The pectorals are as long as the head in front of the oper- 

 culum. 



The scales are moderately large, there being thirty-three along the lateral 

 line, five rows above, at the origin of the dorsal fin, and twelve rows beneath. 

 On the caudal peduncles there are four rows above, and five beneath. 



D. XII. 11. A. III. 13. 



The color is brownish yellow, reticulated on the trunk with a dark brownish 

 hue, which margins each scale. A dark band commences behind the snout, 

 obliquely tends towards the eye, and behind is divided into two, the upper of 

 which runs along the oculo-scapular groove, is continued high on the side, and 

 nearly joins the corresponding one on the back of the caudal peduncle; the 

 lower one croises the operculum at its angle, and on the caudal peduncle runs 

 along the lateral line, but ceases before the end of the latter, and alternates 

 with two spots behind the base of the caudal fin. A band less distinct runs 

 on the head from the angle of the mouth, and passes close above the angle of 

 the preoperculum. The pectoral fins are immaculate and yellowish ; the spi- 

 nous dorsal has its postspinal tips orange ; the posterior parts of the dorsal and 

 anal as well as of the caudal are yellowish, while the rest is darker. The first 

 ray of the ventrals is orange. 



Two specimens of this species were sent to the Smithsonian Institution by 

 Mr. Xantus ; one is in spirits and is nearly nine inches long. The dorsal ex- 

 tend back to the end of the caudal scales ; the anal to the base of the lower 

 caudal rays; the external caudal rays are scarcely produced; the ventrals do 

 not extend to the anus. The other is about sixteen inches long; the dorsal 

 ends raiher behind the caudal scales, while the anal is much produced, and ex- 

 tends as far back as the posterior caudal margin ; the external caudal rays of 

 the naked part of the caudal are nearly twice as long as the others. 



Haupe pectorallis Gill. 



The greatest height is little more than a third of the length. The head is con- 

 tained about three times and a third in the same length, and in the young is 

 symmetrical and conical, the profile being nearly straight, but in the adult the 

 loreuead is very giboous above the eyes Tne preoperculum is either entire or 

 very slightly crenulated, vertical behind, and with its angle obliquely rounded 

 and curved forwards. The eye is subcircular, and its diameter a little less than 

 a six'h of the head's length; it is disant two and-a-half times its diameter 

 from the snout; the height of the preo bital bone equals half the length of the 

 snout. The mouth is moderate, the supramaxil'ary b me ending nearly under 

 the posterior nostril. The four large teeth of the upper jaw are nearly equal 

 in size; the median are approximated and curved outwards, and are separated 

 by a diastema from the external, each of which is curved downwards ar.d out- 

 wards. Of the front teeth of the lower jaw, the two median are very small, 

 nearly vertical, and separated by a diastema from the external, which are as large 

 as those of the upper and directed forwards. Behind the large teeth is a band 

 of granular ones. 



The summits or angles of all the fins, except the pectoral, become elongated 

 with advancing age, so that, finally, the dorsal extends backwards nearly to, 



1862.] 



