18 



SIR CHARLES ELIOT. 



l)ackwards, so that the whole radula is fan-shaped. The front rows contain ten to 

 fifteen teeth on each side of the rhachis, the middle rows fifteen to twenty-five, and 

 the back rows twenty-five to thirty. The central tooth (fig. 17) is much broader than 

 in the last species. In the front rows it is distinctly bifid, and the laterals close over it, 

 but, as the rows widen, it becomes separated from the laterals by a distinct space and 

 the cusp is irregularly indented. The outlines of the base both of this tooth and of 

 others are very indefinite, and seem to melt into the membrane which bears the radula. 



Fig. 17. — Bathydoris inflata — Bhachidian Teeth. 



Fig. 18. — Bathydoris inflata — Two First 

 Latebals. 



The first lateral (fig. 18) bends towards the rhachis, and has a long base and a low 

 flattened hook bearing one distinct denticle and an irregularly jagged edge on the 

 inner side. The second lateral (fig. 19) has a squarer base, and the hook, though 

 narrower, is still flattened, and bears a distinct terminal denticle. The third lateral 

 (fig. 20) is much the same, and the rest gradually become straighter and more erect 

 until the sixth or seventh attains the form which prevails until the end of the row. 

 The teeth near the rhachis are flatter and more diflerent from the rest than in 



Fig. 19. — Bathydoris inflata- 

 Second Lateral. 



Fig. 20. — Bathydoris inflata^ 

 Third Lateral. 



Fig. 21. — Bathydoris inflata — Lateral 



PROM THE JIlDDLE OF HALF Row. 



B. hodgsoni. The laterals (fig. 20) in the middle of each half row are stoutish but 

 fairly erect. They often have the extreme tip bent, and bear a wing-like ridge at the 

 side. The four or five outermost are rudimentary. 



As mentioned aliove, in spite of the differences in the dentition, ])r;iuchia3 and 

 other points, I do not think it impossible that this may be a younger specimen of 

 B. hodgsoni. Owing to the condition of the internal organs, it is impossible to say if 

 the stomach was armed with spines or not. 



