LOCATION OF THE 8A0CULU8 IN FISHES. 31 



ToXOTIDJS. 

 Toxotes jaculator, an Indian fish, with the curious habit of 

 shooting its prey of flies, as they sit on leaves of plants over- 

 hanging water, with a pellet formed of a drop of water. They are 

 kept in aquaria by the natives of Bengal to watch the process. 

 A swelling of thin bone, but not of great size, denotes the site 

 of the sacculi. The sagittal were lifted out easily without any 

 cutting away of bone. They are large for the size of the fish 

 (fig. VI., 11). 



Nandid^;. 

 Nanclus marmoratus, an Indian fish. The specimen examined 

 came from the delta of the Ganges. Two very prominent bony 

 excrescences on the right and left of the basi-occiput indicate the 

 sites of the sacculi ; the bone is hard and not transparent. The 

 lagena is a distinct broad prolongation of the sacculus. The 

 sagittae are moderately large; the pocket that contains them, 

 although open at the top, requires the bone to be cut away 

 before they could be abstracted (fig. IV., 7). 



Percid^b. 

 Perca fluviatilis (" the Perch "). Illustrated fig. V., 2. 



Serranid.^. 

 Lutjanus annularis, a fish from the Indian Ocean. A piece of 

 thin bone but not transparent projecting slightly from the basi- 

 occiput points out the site of the sacculus. The sagittae are very 

 much curved (fig. IV., 8), and are fairly large, also much 

 embedded in bone that requires to be cut away to get them out. 

 The lagena is a broad prolongation of the sacculus, but not marked 

 off by any appreciable constriction. 



SlLLAGINID-E. 



Sillago sihama, called "the Whiting" by English people at 

 Madras because it is a good table fish, reminding them of 

 Whiting. The sites of the sacculi very plainly marked by two 

 prominent swellings on the basi-occiput of thin bone, transparent 

 enough to show the sagittae in their natural position, which is 

 very much inclined to the centre line of the skull. The sagittae 

 are much curved (fig. V., 7), and the bone at the two ends 

 requires to be cut away to get them out. The lagena is a 



