GASTEEOPODA. 337 



Calma, Alder and Hancock. 



Animal sharply angular in front ; foot broad ; papillae simple 

 and supported on cylindiical bases ; tentacles small. 

 Distribution, 1 species. North Sea. 



Payorinus, Griibe. 



Animal with slender cephalic tentacles knobbed at tho 

 extremity; oral tentacles 2 pair; papillse arranged in seyeral 

 oblique rows. 



Distribution, 1 species. North Sea. 



Galyina, Alder and Hancock. 



Animal with papillae in transverse rows ; oral tentacles short 

 and tapering ; rounded in front. 

 Distribution, 2 species. North Sea. 



CuTHONiA, Alder and Hancock. 



Animal with head naked and expanded ; papillae clavate and 

 arranged in thick- set rows. 



Distrihution, 1 siDecies. North Sea. 



FiLURTJS, Dekker. 



Poot stunted ; body slender ; tentacles 2 ; mouth on a loose 

 fringe of skin with 2 small oral feelers ; papillae in 2 long rows 

 down the back. 1 species. 



Peoctonotus, a. and H. 



Ti/2:)e, P. mucroniferus, PI. XIII. , Pig. 16. Dublin, shallow 

 water. 



Synonyms, Venilia. A. and H. Zephrina, Quatref. 



Animal oblong, depressed, pointed behind ; dorsal tentacles 

 2, linear, simple, with eyes at their base, behind ; oral tentacles 

 short; head covered by a^ small. semi-lunar veil; mouth with 

 horny jaws; papillae on. ridges down the sides of the back and 

 round the head in front ; vent dorsal. 



Distribution, 3 species. North Atlantic. 



Antiopa, a. aiid H. 



Tyjpe, A. splendida, A. and H. 

 Synonym, Janus, Yerany. 



Animal ovate-oblong, pointed behind ; dorsal tentacles lamoi- 

 lated, united at the base by an arched crest ; head with a small 



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