DISCUSSION OF SPECIF.S AND THEIR DISTKIliUTIOX. 



453 



Tlie dorsal fin begins npon tlio snout, in tlie pciix'ndiciilar from ihv. anterior margin of 

 the lower eye. It is eoiM]Mise(l nf from Hit to 1(14 simjile i-ays (in 5 specinicns), tlie longest 

 of wliieli in the posterior fonrth of the fin; their length (9) nearly half that of the head. 

 The anal fin begins between the tips of the ventral, close, to tins vent, and nnder tin; inser- 

 tion of the pectoral. It is coiujjosed of 70 to 84 siinide lays, the longest in the; ])osteii(>r 

 fourth; their length (7) slightly more than one-third fh^^ length of the head. 



The caudal is sessile, rounded, the middle lays in l(>ngth (17) nearly donble the longest 

 dorsal rays. 



The pectoral, i)resent only on the colored side, is inserled elose (o the liiiuiched open- 

 ing, its length (15) three-fonrths that of the head. 



The ventrals are npon the median ventral line, even in h'ngtli ((>), slightly shorter or 

 nearly equal to the longest lays of the anal. 



Color on the left side ashy brown, with numerous more or less distinct darker brown 

 spots. On the blind side white. Pectoral blackish, with tra<'es of lighter transverse bands. 

 Radial formula: D. 00-103; A. 70-84. Lateral line. Oli. 



*20 in curve. 



The young form of Monoleiie described by Goode under the name Tlii/ri.'i pelluciclug 

 (Fig. 359) is so remarkably distinct, that the description is given here: 



The length of the specimen described (No. 20005) is 72 millimeters. 



The height of the body (32) is about one-third of its length (without caudal), the least 

 height of the tail (7) one-fourteenth. The body is thin, pellucid, larvallike. divided into 

 three longitudinal tracts by dei)r«>ssioiis at the bases of the rows of iiiterspiiions processes, 

 as in Glyptuccphalii>i. 



The scales are small, thin, easily detached (none renmin upon the si)ecimen except a 

 few in the lateral line). The number of transverse rows is estimated at 120, the number 

 of rows above and l)eh)w the lateral line at the wid.'st iiortioii "f the body 17 or 18. The 

 scales in the lateral line are provided with a large central <-anal. I'he lateral line is 

 straight on both sides. 



The head is very small; its length (fs) contained about live and one-half times in the 



