neio Cyprtnodont Fish from Johore. 



549 



a new Cvprinodont in the following words: — " Die beschrei- 

 bung zweier weiterer, einer neuen Gattung rait gekieltem 

 Abdomen, hinter (lev A. befindlicher D., gegabelter C. and 

 fehlenden V. angehorigen Arten dieser Kami lie behalte Icli 

 fur spater vor. Beide gehoren dem Brackwasser an (Kuala 

 Langat, Muar-FIusz bei Bandar Maharani)." 



A few months ago Dr. Duncker visited the British Museum 

 to stud j our Syngnathidse, and I then asked him whether 

 he had published anything further concerning these fishes, 

 whereon he kindly offered to send me some of them for 

 description, as he was engaged in other work. 



The specimens prove to belong to a new genus and species, 

 which is so different from other known Cyprinodonts that it 

 should perhaps rank as the type of a separate subfamily. 



Phallostethus, gen. nov. 



Form elongate, compressed ; scales moderate ; vent 

 thoracic. Mouth protractile, oblique, with the horseshoe- 

 shaped lower jaw included within the shovel-shaped upper 

 one ; teeth conical, biserial ; outer series of upper jaw curved, 

 rather strong, especially the anterior lateral ones ; outer 

 series of lower jaw nearly horizontal. Dorsal fin short, 



Fiji. 1. 



PhaUofttthus dunckeri, male and female, a little more than twice 

 natural size. 



originating above end of the long anal ; in front of the latter 

 a median dermal fold placed in a groove. Female with 

 pelvic fins minute, below the pectorals, between vent and 

 opening of oviduct. Male with a huge muscular appendage 

 attached between the expanded hypocoracoids and free 

 distally, bearing the vent on one side at about the middle of its 



