102 MEMOIRS OF THE CARNEGIE MUSEUM 



2. Fourth thoracic shghtly below level of pectoral, instead of above its level. 



3. Second ventral above and somewhat anterior to the first, instead of 

 above and behind it. 



4. First supra-anal on level of second, over or before the fourth ventral. 

 In L. micropterus, the first supra-anal is considerably below the level of the 

 second, and behind the fourth ventral. 



Brauer compares L. micropterus with L. oculeus Garman, with which species 

 he at first identified it. But the two are not closely related. L. oculeus has 

 not only the infrapectorals obliquely arranged, but has both second and third 

 ventrals elevated. 



Measurements in hundredths of length without caudal: Length of head 33; 

 diameter of eye 5.5; length of maxillary 23; greatest depth 21; least depth of 

 caudal peduncle 6; distance from tip of snout to front of dorsal 53; to base of 

 ventrals 46; to front of anal 56; to last dorsal ray 65; to last anal ray 75. 



Dorsal rays 14; anal rays 17; pectoral rays 9; ventral rays 8. Scales of lateral 

 line 34. 



Ventrals inserted in advance of dorsal; origin of anal under middle of 

 dorsal; pectorals very short and slender, not reaching ventrals; ventrals to vent. 



Phoiophores. — A small pre-orbital on orbital margin immediately below level 

 of posterior nostril; a small round spot on shoulder cannot be positively identi- 

 fied as a photophore; suprapectoral on the lateral line; upper infrapectoral in 

 front of middle of pectoral base, the lower vertically below it. Thoracics five, the 

 fourth elevated, vertically above the third and on level of lower pectoral ray; 

 first thoracic interspace much wider than the others. Supraventral on the 

 lateral line, somewhat in advance of the base on the ventral fins. Ventrals five, 

 the second elevated, above and in advance of the first, the first, third, fourth 

 and fifth equally spaced and equidistant from the midventral line. Supra-anals 

 forming a right angle, the third on the lateral line under the middle of the 

 dorsal fin, the second and first equally elevated, the second over or slightly in 

 advance of the fourth ventral. Postero-anal on the lateral line. Antero-anals 

 six, the fifth elevated, the others on the same level, the first interspace longer 

 than those which follow. Posteroanals six, none of them opposite the anal fin. 

 Precaudals three, the first above the first caudal ray, lower than the last postero-anal 

 and separated from it by a wider space than occurs between the postero-anals; 

 second precaudal elevated, a little behind the oblique line joining first and 

 third, its distance from first little more than half its distance from the third, 

 which is above and a httle behind it, in contact with the lateral line. 



