ol8 ]Mr. C. T. Eegan — A Synopsis 



hy Prof. Max Weber. The species may be distinguished by 

 means of the following synopsis : — 



Species from Slam, Maliy Peninsula and Archipelago. 



I. Head covered with smootli skin. 



A. Dorsal spine less tliau 5 length of head ; maxillary barbel reaching 



pectoral. 



Depth of body in the length 1. fusctis, Popta, 1904. 



Depth of bod}' 6 in the length 2. mahakamensis, Vaill., 



[1902. 



B. Dorsal spine at least |- length of head. 



1. Maxillary barbel reaching pectoral; head nearly as broad as 



long 3. ste}io7nns, Cuv. & Val. 



2. Maxillary barbel not extending beyond head, which is longer 



than broad. 



a. Occipital process reaching basal shield of dorsal spine. 



Head 1| to 1| as long as broad 4. posciloptenis,C\x\.&,ya\. 



Head 1^ as long as broad 5. siainensis, sp. n. 



b. Occipital process not reaching basal shield of dorsal spine. 



«. Vomerine band of teeth -nithout or with a very short and 

 blimt median posterior process. 



* Caudal peduncle about twice as long as deep. 

 Occipital process not longer than eye, less 



than its distance from basal bone of 



dorsal spine 6. micropogon, Cuv. & Val. 



Occipital process a little longer than eye, 



as long as its distance from basal bone [1894. 



of dorsal spine 7. saravacensis, Bouleng., 



Occipital process I5 to 2 as long as eye, 2 



to 2i as long as its distance from basal 



bone of dorsal spine ; head 1| as long [1906. 



as broad 8. haramensis, Regan, 



Occipital process more than twice as long 



as eye, 4 times as long as its distance 



from basal bone of dorsal spine ; head 



1§ as long as broad 9. merahensis, sp. n. 



/3. Caudal peduncle 2h to 2| as long as deep. 



10. hosii, Regan, 1906. 



b. Vomerine band of teeth with a strong median posterior 

 projection 11. doj'ice, sp. n. 



II. Upper surface of postorbital part of head naked, rugose ; occipital 

 process meeting basal shield of dorsal spine ; snout scarcely pro- 

 jecting beyond mouth ; teeth on palate forming a curved band 

 without median posterior projection. 



A. Supraclavicular plate small, not produced backwards, its lower 

 edge in contact with basal part of clavicular process. 



1. Head nearly as broad as long ; pectoral spine as long as head. 



12. breviceps, sp. n. 



