352 



aa. Vomerine band of teeth without or 

 with a very short and blunt median 

 posterior process. 



a. Caudal peduncle about twice as long 

 as deep. 



1. Occipital process not longer than 

 eye, less than its distance from 



basal bone of dorsal spine. . . . L. micropogon p. 357. 



2. Occipital process a little longer 

 than eye, as long as its distance 



from basal bone of dorsal spine. L. saravacensis p. 358. 



3. Occipital process I 1 /? to 2 as 

 long as eye, 2 to 2^2 as l n g as 

 its distance from basal bone of 

 dorsal spine; head i 1 /^ as long 



as broad Z. baramensis p. 358. 



4. Occipital process more than twice 

 as long as eye, 4 times as long 

 as its distance from basal bone 

 of dorsal spine; head i 2 / 3 as 



long as broad L. merabensis p. 359. 



|3. Caudal peduncle 2 1 /* to 2 8 / 4 as long 



as deep L. hosii p. 360. 



bb. Vomerine band of teeth with a strong 



median posterior projection. ...;.. Z. doriae p. 360. 

 II. Upper surface of postorbital part of head naked, 

 rugose; occipital process meeting basal shield of 

 dorsal spine; snout scarcely projecting beyond mouth; 

 teeth on palate forming a curved band without median 

 posterior projection. 



A. Supraclavicular plate small, not produced back- 

 wards, its lower edge in contact with basal part 

 of clavicular process. 



1. Head nearly as broad as long; pectoral spine 



as long as head L. breviceps p. 361. 



2. Head longer than broad ; pectoral spine shorter 

 than head. 



a. Depth of body 5>/ 2 to 7 in the length; 

 caudal peduncle 2'/ 2 as long as deep, 

 a. Bony area of upper surface of head with 



straight anterior edge; occipital process 



longer than broad ; ventrals reaching 



anal; fins immaculate L. inornatus p. 362. 



