4. CniLOBRANC'HUS. 17 



Symbranchus iiumaculatus, MiiUer, AUuindl. Ak. Wus. Berlin, 1839 

 p. 245 ; Cantor, Mai. Fl,sh. p. P,:>,7 ; L'lcek. Verh. Bat. Gen. xxv' 

 Mur. p. 57 ; or Nat. Ttjds. Ned. Lid. iii. Borneo, vi. p. 438. 



gutturalis, Richards. Voij. Ereb. IS,- Terr. Fish. p. 49, pi 30 



figs. 14-17. r J 1 



Tetiabianriius microphthalmus, Bleek. Nat. Ti/ds. Ned. Ind. ii. p 69 



Synlji-auclms bengalensis, L'leek. Atl. Ichth. Mur. p. 119, pi. 48. %. 1.' 



Snout very short, subtruncatc ; eyes small, close to the end of the 



■Snout. Gill-opening of moderate width, extending to the side, or 



nearly so, of the ventral surfaoe. Yert. 80/53. 



Bengal. East-Indian archipelago. Dampier's archipelago. 



n, b, c, d. Many adult, half-grown, and young specimens. River 

 Hooghly. 



e. Young. Philippine Islands. Purchased of Mr. Cuming. 



/. Young. Dampier's arcliipelago. Presented by Sir J. Richard- 

 son. — Type of ,S'. r/ntturalis. 



;/. Adult : skeleton. River Hooghly. From the Collection of the 

 East-India Company. 



3. Symbranchus caligans. 



Cantor, Mai. Fish. p. 334, pi. 7. 



Snout of moderate length, obtusely pointed ; the minute eye is 

 nearly opposite to the middle of the lip. Gill-opening very wide, 

 extending up the side to the lateral line. 



Pinang. 



a. Type of the species. From Dr. Cantor's Collection. 



Third Group. CHILOBRANCHINA. 



4. CHILOBRANCHUS. 



Cheilobranchus, Richards. Voy. Ereb. ^ Terr. Fish. p. 50. 



Body naked*, compressed, subcylindrical in front, moderately 

 elongate. Head small ; snout very obtuse and short ; mouth nar- 

 row', with the upper jaw slightly protractile ; eye of moderate size. 

 Teeth in the jaws in a single series ; none oii the palate. Gill- 

 opening transverse, the gill-membrane not attached to the isthmus ; 

 hinder edge of the gill-opening vrith a raised lip. Four branchial 

 arches, no slit behind the fourth ; giUs well developed ; no accessory 

 breathing-sac. Vent in the anterior half of the total length, M'ith a 

 minute jjapilla. Vertical fins reduced to a simple cutaneous fold, 

 without rays. Intestinal tract straight— the stomachal dilatation 

 being longer than the intestine proper, and provided with a short 

 coecal appendage near its upi)er end. 



Australia and Van Diemen's Land, 



* I mil uiuiblu t.i liii'l the iiiiiuilc scales iiientiuiied by Sir. J. Eichai-dsou. 

 VOL. vm. ,, 



