DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 173 



LIPOGENYS, Goode and Bean, n. g. 



Head and body compressed, tbe body elongate, as in Notacanihm. Snout produced, 

 compressed, obtuse at tip. Cleft of the mouth inferior, suctorial, circular in Iront, siu'- 

 roun(Jed by rugose, contractile lip, with cleft posteriorly, flanked by wing-like flaps, con- 

 taining the inodifled niandibulary bones, which articulate with the end of the maxilla, and 

 are free behind. A concealed spine at the end of the maxilla. No teeth. Anterior nostril 

 in short tube, the posterior oblong, under a short flap. Dorsal fin short, but normal and 

 well developed, with a distinct soft portion. Anal fin normal in position, high, with many 

 spines, and with some of the rays spine like, though forked. A distinct, though very small, 

 caudal lin. Ventrals normal, well developed, with several spines. Scales minute, very 

 numerous. Lateral line conspicuous anteriorly. 



LIPOGENYS GILLII, Goode and Bean, n. a. (Figures 190; 196 A, B.) 



Body compressed, its greatest width one-half its height, which is about one-tentli of the 

 length. The length of the Iiead is contained Sg times in that of the body and twice in the 

 distance from the origin of the pectoral to the vent. The width of the interorbital space 

 is about equal to the diameter of the eye, which is one-fifth the length of the head. The 

 length of the snout is nearly one-fourth that of the head. The postorbital portion of the 

 head is twice as long as the snout. The peculiar form of the jaws and mouth has been de- 

 scribed under the head of the genus. The diameter of the circular opening is about one- 

 half the diameter of the eye. The dorsal fin begins at a distance from the snout equal to 

 about three times the length of the head. It consists of 5 graduated spines, of which the 

 first is minute and the longest as long as the snout, and 5 rays, of which the second is 

 longest, nearly one-half as long as the head. The spines and rays are all compactly 

 arranged in a strong, triangular fin. The length of the dorsal base equals one-half that of 

 the head. The anal begins under the fourth spine of the dorsal; it contains 41 spines and 

 88 rays, of which the anterior ten are stiff, though articulated, and divided at the tip. The 

 longest ray is longer than the longest spine, about as long as the snout. The ventral con- 

 sists of 3 spines and 7 rays. The two fins almost meet in the median line, but are discon- 

 nected. The fin reaches to the vent. Its distance from the tip of the snout is about 2J 

 times the length of the head. The pectoral is placed below the median line of the body, at 

 a distance from the head about equal to the diameter of the eye; its length is a little greater 

 than the postorbital part of the head. The lateral hue is well developed anteriorly, becom- 

 ing obsolete at a distance from the end of the dorsal about equal to 2i times the length of 

 the head. 



The color is uniform light browTi. The under side of the gill covers dark, showing dark 

 at the edges of the opercular bone. 



The type measures 17 inches in length. It is No. 39212, and was taken by the steamer 

 Albatross at station 2712, in N. lat. 37° 46' 30", W. long. 73° 56' 30", from a depth of 865 

 fathoms. 



Order TELEOCEPHALI. 



TeUocephali, Gll-L, Johnson's Cj-clopsedia, iv, 763, 1877. 



Skeleton more or less ossified ; skull well developed, and its elements numerous, with 

 cranial bones as follows: Of cartilage bones, basioccipital, exoccipital, supraoccipital, basi- 

 sphenoid, alisphcnoid, opisthotic, prootic, postfiontal, and prefrontal; of membrane bones, 

 parietals, froutals, nasals, vomer, parasphenoid, superorbitals, interniaxillaries, and super- 

 maxillaries; the suspensory arch of the lower jaw has a well developed quadrate bone, with 

 which, on the one hand, is articulated the pterygopalatine arch, consisting, generally, of 

 the ectopterygoid,entopterygoid, mesopterygoid, and palatine bones, and, on the other, the 

 hyomandibularand symplectic; the branchihyal apparatus consists of a median series of 

 bones (glossohyal, basiliyal, ceratohyal, e])iliyai, and styloliyal). with the posterior of which 

 are connected four branchial arches and a modified pharyngeal, and with the anterior of the 



