14 SIR CHARLES ELIOT. 
the rhinophores could possibly be retracted. The posterior part of the body cavity is 
filled by the large bluish-green liver on which lies the yellowish fern-like renal organ. 
Across the blue mass runs the yellowish intestine from left to right (rising from under 
the left side) and then backwards. In front lie the central nervous system and the 
genital mass, both yellowish. The hermaphrodite gland is completely hidden under 
the renal organ. 
Though the internal organs are mostly well preserved, some have fared badly. 
The pericardium is represented by a thin, dried, pear-shaped membrane adhering to the 
dorsal wall from which it can hardly be detached. In front of the liver there lies over 
the pharynx a hard yellow mass consisting of two triangular lobes each measuring 
Fig. 12.—Bathydoris hodgsoni—CEnTRaL Nervous SysTeM: @ CEREBRAL GANGLIA; 6 PLEURAL GANGLIA; 
c PEDAL GANGLIA; d@ COMMISSURE; e BUCCAL GANGLIA. 
about 12 mm. x10 mm. The central nervous system is embedded in this mass, which 
probably consists of the blood gland and the salivary glands fused together, but its 
character could not be more accurately determined. 
The central nervous system (Fig. 12), which is well preserved, is much as described 
by Dr. Bergh for B. abyssorum and B. ingolfiana, and is remarkable for the separation 
and distinctness of the component ganglia. The cerebral ganglia are broader in front 
than behind, and notched on the outer side. The pleural are smaller and rounder, the 
pedal pear-shaped. The cerebral and pedal ganglia give off at least five nerves each 
and the pleural at least three. The buccal ganglia are round, and lie at the sides of the 
