220 RECORDS OF THE AUSTRALIAN MUSEUM. 



Body robust, compressed posteriorly. It is covered with large stix:)iigly 

 ctenoid scales, which completely cover the nape, bases of the pectorals, 

 bi'east and abdomen ; they are largest posteriorly, and the hinder ones of 

 the median row on the caudal peduncle are larger than the others. Caudal 

 peduncle very broad and compressed. Genital papilla small. 



First dorsal fin originating over the anterior half of the pectoral ; the 

 second to fourth rays are subequal in length, and the latter reaches the 

 origin of the second dorsal when adpressed. Dorsal rays increasing 

 slightly in length to the penultimate, which is about as long as the spines. 

 Anal opposite to, and of similar form to the second dorsal, but with a 

 shorter basal length. Pectorals obtusely pointed, the median rays reaching 

 to the vertical of the anterior dorsal ray. Caudal broadly rounded. 

 Ventral fins united at their base by a narrow membrane ; the rays increase 

 in length to the fourth, but the fifth is much shorter. 



Culonr-viarkiuy. — Light brown in alcohol, with broad darker brown 

 cross- bands ; one of these is placed below each dorsal tin and one across 

 the caudal peduncle, and they have numerous irregular dark markings 

 between them. The cross-bands extend onto the dorsal fins where they 

 break up into irregular dark marblings. Pectorals, caudal, and anal with 

 irregular dark cross-bars, the base of the former with two darker stripes. 



Described and figui'ed from a specimen 47 mm. long, from Two Isles, 

 North Queensland. , 



Variation. — A series of over one hundred specimens 23-56 mm. long, 

 exhibits some variation in the details of the colour-mai'king, which is 

 much more pi^onounced and more variegated in some specimens than in 

 others. The mucigerous system of the head is as well developed in the 

 youngest as in the largest specimens, and the ridges are similarly arranged. 



This species has been associated with Gdhiomorphiis, Gill, by Jordan 

 and Seale, but it differs from that genus in the great development of the 

 cephalic mucigerous system. This character distinguishes it from all 

 other genera known to us except Gallogohius, from the typical species of 

 which it only differs in the structure of its ventral fins. In C. hasseltii, 

 these are truly gobioid in form, having a distinct though narrow basal 

 membrane uniting the spines; the fifth rays are slightly shorter than the 

 fourth, but are united by membrane to their tips : in C. scUiteri the 

 ventrals have no anterior basal membrane connecting the spines ; the inner 

 rays are much shorter than the others, and are connected by membrane 

 only at their extreme bases. There being no other major differences 

 between them, it seems probable they are congeneric. 



Lor. — We have examined specimens from Two Isles, near Cape 

 Bedford, North (^ueenshiiid ; coll. Hedley and Briggs, August l!»16. New 

 Hebrides, Solomon Islands, and Fiji ; coll. Cummins and Stevens. 



Genus ExvuiAS, Jordan i)- Scale. 



Exijriaty, Jordan & Seale, Bull. U.S. Fish. Bnrean, xxv., PJOt!, p. 405 

 (Gobiiis piuitan.tjoiiles, Bleeker). 



Body elliptical and compressed, the caudal peduncle shox't and deep ; 

 head deeper than wide, with a short acclivous snout, the cheeks not 



