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MOLLUSCA FROM JUAN FERNANDEZ AND EASTER ISLAND 243 
with the right parietal ganglion fused with the abdominal one, and with a rather 
short and broad cerebral commissure. 
The genital organs (fig. 17) are like those of Zornatellina in general. 
From the gonad situated in the beginning of the third whorl and consisting of 
crowded clusters of short finger-like branches, a short canal conducts to the 
winding hermaphrodite canal, which in the fourth whorl becomes differentiated 
in an ampulla receiving also the contents from a well-developed albuminiparous 

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en Dy yoo 
oe 
Fig. 16. Nervous system of Fernandezia bulimoides Pfeitier. & buccal ganglia; ¢ cerebal ganglia; 
o oesophagus; # pedal ganglia; Jar parietal ganglion; £/ pharynx; Z/ pleural ganglia; s. d. salivary 
duct; ¢ tentacle; v visceral ganglion. 
Fig. 17. Genital organs of ernandezia bulimotdes Pfeiffer. Marking as in fig. 11. 
gland. From the same ampulla issues further, 1) a rather wide vesicula seminalis, 
extending downwards on the inside of the columellar muscle and ending blindly 
fixed to the muscle in the same manner as in Zornatellina described above; 
2) a seminal canal, commencing with a large prostata gland composed of a 
crowded mass of short winding lobules from where the vas deferens rises; 3) the 
oviduct which in all adult specimens examined was a very wide sac-like forma- 
tion with thin walls, and contained a lot of young ones (up to 15), the largest 
of which had a shell with 21*/2 whorls. 
The distal portions of the genital organs are rather simple. The wide 
oviduct narrows to a short vagina, and carries, at the junction point, a sperma- 
