124 



Prof. E. Loimboror tuul ^Ir. II. Keiulahl (>/* 



Length of head a little more than 3^ times in total length. 

 Head a little more than 1^ times as long as broad, coveretl 

 by a sot't skin, so that the tine granulations are not very 

 cons|)icuv)us. Occipital process broadly and bluntly angular. 

 Frontal tontanelle broadly sole-shaped, its widtii being con- 

 tained 2,'. times in its length ; its anterior end on a level with 

 the centre ot' the e^'es ; its length 6^ times in the length of 

 head. Occipital tontanelle entirely in advance of the 

 occipital process, its breadth contained 1| in its length, and 

 its length 9^ times in length of head. Eye very small, its 

 diameter il times in length of snout, about G times in inter- 

 orbiial width, which is contained 2^ times in length of head. 



Fig. 2. 



Head of Clarias hrevinuchalis, Nat. size. 



Band of pvemaxillary teeth 4^ times as long as broad. 

 Vomerine teeth granular, forming a crescentic band as broad 

 as ]neinaxillary band. Nasal barbel about ^ length of head. 

 Maxillary barbel reaching tip of pectoral spine or beyond. 

 Outer mandibular barbel a little longer than head, inner 

 mandibular barbel about as long as nasal barbel. Gill-rakers 

 rather long, 22 on the first arch. Clavicles concealed under 

 the skin. Dorsal 78, its distance from occii)ital process \ of 

 the length of head, almost in contact with caudal behind. 

 Anal about 55, almost in contact with caudal. Pectoral 

 spine rather strongly serrated on the inner side, while the 

 outer one may hardly be termed anything but granular. 

 Length of pectoral fin about equal to half the length of the 

 head. Pectoral spine 1/^ times in length of head. Distance 



