444 Bulletin American Mtiseum of Natural History. [Vol. XIX, 



BERYCID^. 



Pycnosterinx levispinosus, sp. no v. 

 Plate XXXVI, Figure 4. 



This small species was found at Hajula. The number of 

 the type and only specimen is 4528 (3671). 



This has been a ver}^ short -bodied, elevated, and compressed 

 fish. It is possible that distortion has somewhat diminished 

 its length, but of this there is no evidence. The length from 

 the snout to the base of the caudal fin is 29 mm., while the 

 greatest depth is 30 mm. The length of the head to the bor- 

 der of the operculum is 12.5 mm. The body has been cov- 

 ered with scales of moderate size. Whether or not these were 

 ctenoid is yet uncertain. There is some indication that they 

 were feebly ctenoid. The scales have also covered the bases 

 of the dorsal and anal fins. 



The dorsal fin has been composed of 7 or 8 spines and ap- 

 parently 16 soft rays. Seven spines are present, but it seems 

 probable that the most anterior one has been eroded away. 

 The spines are stout and entirely smooth. The tip of the 

 hindermost has apparentl}^ been segmented, but its size 

 makes it proper to count it with the spines. Through erosion 

 of portions of the bone it is seen that the spines and the sup- 

 porting interneurals have been hollow, their lumen being now 

 filled with calcite. It is also revealed that the notochord 

 passed continuously through the vertebral centra. 



The anal fin has had 3 or 4 spines and 10 to 12 soft rays. 

 It seems probable that the most anterior one has been weath- 

 ered away. These spines are stout and smooth. 



The caudal fin has been forked. The pectoral fin is present 

 in its natural position, but the rays have been damaged. The 

 ventrals arise below the pectoral. The spine has been stout, 

 and' long enough to reach to the first soft rays of the anal fin. 

 It is now represented mostly by its imprint in the matrix. 



From the other species of the genus found at Mount Leb- 

 anon, except P. duhius, this species differs in the greater 

 number of dorsal spines and smaller number of soft rays. 



