ANATOMY OF PALUDESTRINA 



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As in allied forms the cerebro-pleural connectives are absent, 

 the gangha being practically contiguous on each side. The 

 right pleural ganglion is larger than the left. The pleuro-pedal 

 connectives are short and closely applied to the cerebro-pedals. 



The pedal ganglia are rather triangular in transverse section. 

 Posteriorly they bear a pair of otocysts. 



Central nervous system (diagrammatic). 6, buccal ganglion ; 

 c, cerebral ganglion ; Ip, rp, pleural ganglion ; Ipd, pedal ganglion 

 (l) ; pp, propodial ganglia ; sb, subintestinal ganglion ; sp, supra- 

 intestinal ganglion ; on, osphradial nerve ; t, tentacular nerve 

 and ganglion ; pdn, parapodial nerve. 



The visceral commissure is of the shortened type and 

 resembles that seen in Vitrella and Bythinella, though 

 it agrees with the former in the amount of abbreviation, the 

 supra-oesophageal pleural connective not being so shortened 

 as in the latter. The supra-oesophageal portion follows the 

 oesophagus more or less closely to the abdominal ganglion 



