Fig. 1. 



95 



Fig. 4. 



Fig. 3. 



Fig. 2. 



p.c. 



Fig. 1. Auditory labyrinth of Orthagoriscus Mola within its cavity. The con- 

 nective tissue filaments are omitted. 



Fig. 2. Right auditory labyrinth, inner side. 



Fig. 3. Do., outer side. 



Fig. 4. Diagrammatic transverse section through vestibule. 



TJ. utriculus, S. sacculus, L. lagena, rec. recessus utriculi; a.sc., p.s.c, h.s.c, ante- 

 rior, posterior and horizontal semicircular canals; a.a., a.p., a.h., their ampuH«; s.S., sinus 

 superior; m.r., m.s., m.L, macula recessus, mac. sacculi, and mac. lagenae. 



macular are furnished with numerous sniall white rounded otoconia, 

 aggregated together. Of these a very few have a cubical crystalloidal 

 form, like those of Acanthias, but the majority are rounded or oval, 

 rough on the surface, and concentrically striated within. 



The fish was unfortunately not fresh enough for histological study ; 

 nor am I able to describe the course of the auditory nerve, which 

 was cut short in removing the brain. 



