DISCUSSION OF SPECIES AND THEIK Dl.STKlBUTION. 



221 



ralslarger than ventrals. Lateral line unarmed. Small tcetL in jaws. Brancliiostegals, 

 5 to 7. 



The young forms of this genus appear to have been found chiefly in East Indian and 

 Australian seas and in the Pacitie, the adult forms in the Atlantic and Mediterranean. 

 Liitken, in his Spolia Atlantica, critically reviews the group in his usual masterly style. 



PSENES PELLUCIDUS, LCtken. (Figure 228.) 



Psenes pelluvidus, Li'tken, Spolia Atlantica, 1880, 516 (108), fig. ; 601 (193). 



A species of Psenes with a high, short, compressed body, nearly colorless and semi- 

 transparent, taken at the Strait of Surabaja, is lecognized by Liitken as distinct. 



Greatest height of the body (23 millimeters) containsd 2J times in the total length 

 (without caudal); the length of the head (13 millimeters) is one-quarter of the total length. 

 Diameter of the eye, 5 millimeters; length of the snout, 3i millimeters. The jiectoral fins are 

 9 millimeters long; ventrals 14 millimeters, extending considerably bcj'ond the end of the 

 pectorals. The vertical fins are quite high (10 millimeters), and show a tendency to become 

 falcate posteriorly. Dorsal fin with 12 spines and 34 rays: anal with 3 spines and 34 rays. 

 Caudal fin furcate. Latei'al line placed high. Scales small. Dentition as in the other 

 species of the genus; teeth in the maxillary are finer and farther apart than in the mandi- 

 ble; the end of the maxillary reaches to the vertical from the anterior margin of the pui)il. 

 {LiitJicn.) 



A single specimen was obtained by the Albatross in 32° 24' N. lat., 76° 55' 30" W. Ion., 

 at a depth of 528 fathoms. 



Liitken also describes another species of Psenes from the Atlantic, which he thinks 

 may possibly be distinct — Psenes macidatus, Spolia Atlantica, p. 110 (518). A specimen, 

 .seemingly of this species, was obtained by the Albatross in the western Atlantic, N. lat. 

 27° 49', W. Ion. 76° 12', over a depth of C33 fathoms. The specimen was taken at the sur- 

 face. (Figure 229.) 



Family LUVARID^E. 



Dianidoe, Gill, Arrangement of the Families of Fishes, 1872, 9. 

 Luvarida;, Gill, 1885, Century Dictionary, 3549. 



Scombroids, with a compressed, oblong body, covered with minute granular scales. 

 Mouth small; teeth in fine rows in the jaws. Tent thoracic. Dorsal and anal single, com- 



LuvABr? iMPERiALis young. (After Day.) 



posed of unarticulated, widely-set spines. Ventrals absent, or subjugular, reduced, varying 

 from I, 4 to 0,2, closing over the vent. A keel at root of caudal in adults. Branchioste- 

 gals, 5. PseudobranchiiB present. 



Eepreseuted by a single genus and species. 



