262 THE ZOOLOGIST. 



without the projection. Sargus rondolettii, from the Mediter- 

 ranean, is similar in shape, with the corners more rounded as 

 to three of them, the fourth making a projecting point. 



Drepanidje. 

 Drepane punctata (fig. 19). The stone is of a grape- seed 

 shape. 



Osphromenid#:. 

 Osphromenus olfax (the Gourami) from Java (fig. 20) has a 

 very small lapillus of an irregular rhombic shape, with one 

 corner running into a little spike. 



Carangidje. 



The lapillus of Caranx malabaricus (fig. 21), from the Indian 



Ocean, is of fair size and has two jutting-out spikes from one 



corner, with another corner rounded ; it is roughly quadrate. 



C. trachurus (the Horse Mackerel) has a grape- seed-like lapillus. 



SCOMBRID^E. 



The lapillus in this family, like the other otoliths, is small. 

 Sarda mediterraneus (fig. 22) has it of a pear shape. 



PLEURONECTIDJE. 



In this family the lapilli are small. Psettodes erumei (fig. 23), 

 from the Indian Ocean, has its lapillus shown ; the shape is 

 difficult to describe. 



Triglid^. 



Trigla cuculus (fig. 24) (the Ked Gurnard) has a pear-shaped 

 lapillus. That of T. gumardus (the Common Gurnard) assimi- 

 lates to the same shape. 



The accompanying illustration has been arranged to show the 

 small black outlines, as nearly as possible, of the natural size 

 of the lapilli illustrated. The larger drawing at the side of each 

 is not to scale, but enables some of the markings and sculpturing 

 to be appreciated. 



