264 THE ZOOLOGIST. 



pharyngeal bones are covered with minute cardiform teeth. The 

 lower pharyngeal bones have similar minute teeth. There is a 

 rough surface on the basibranchials and tongue. 



Albulid^;. 



Albula conorhynckus, a fish that swims in tropical seas; the 

 specimen obtained came from Java. It has eight tubercle gill- 

 rakers on the first cerato-hypobranchial and four on the first 

 epibranchial. Similar tubercles are on the inner and outer 

 sides of the other arches that bear gills, all these tubercles bear 

 teeth. There are minute teeth in two patches on the heads of 

 the third and fourth epibranchials that run down on the limb of 

 the third and are confluent at the upper part of the arches. The 

 patch on the fourth is fairly large. There are a few minute 

 teeth for the lower pharyngeals. Minute cardiform teeth are 

 found running from the base of the tongue along the surface of 

 the basibranchials, they seem fixed to the skin, some of them 

 have been rubbed off. The hinder larger part of the tongue has 

 granular teeth on it that show very clearly. Fig. I., 1. 



NoTOPTERIDiE. 



Notojiterus afer from the Gambia River has seven long horny 

 gill-rakers on the first cerato-hypobranchial arch with one 

 rudimentary one ; these are toothed ; there are three on the 

 epibranchial. The longest is about one and a quarter times the 

 length of the gill-lamina below it. There are short horny gill- 

 rakers on the other arches. The upper pharyngeal teeth consist 

 of a small group on the head of the fourth epibranchial of 

 villiform teeth. The lower pharyngeal teeth are in two small 

 groups of similar teeth. A long broad plate of minute cardiform 

 teeth extends from the base of the tongue to the junction of the 

 third arch with the basibranchials. The tongue is provided at 

 its extremity with a recurved sharp conical tooth, there is a 

 longitudinal groove in the mucous membrane of the tongue with 

 six side grooves on each side, in each of the side grooves is a 

 similar tooth, and by pressing this mucous membrane down, the 

 teeth can be easily seen. In the illustration this membrane has 

 been cut away to expose the teeth. Fig. I., 2. There is also a 

 group of teeth on the parasphenoid bone. 



