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XLIX.— A NEW SPECIES OF HALCAMPA {H. ANDRE 811) 

 FEOM MALAHIDE. By ALFEED C. HADDON, M.A., 

 F.Z.S., Professor of Zoology, Eoyal College of Science, 

 Dublin. (Plate XVI.) 



[Read, November 17, 1884.] 



Halcanipa andresii (sp. nov.). 



Description. 



i^or;;?.— Column divided into capitulum, scapus, and physa. 

 Capitulum and scapus slightly corrugated. Physa a distinct 

 rounded bladder, may become flaccid, but is non-retractile, with 

 numerous suckers. Tentacles 12, marginal, monocyclic, cylin- 

 drical, obtuse, slightly arched upwards, about as long as the 

 diameter of the disc. Disc round and flat, central portion often 

 elevated into a truncated cone. Mouth linear. 



Colour. — Capitulum pale burnt-sienna colour, with a pair 

 of sulphur-coloured bracket-shaped ( ) marks in the inter-radii. 

 Scapus translucent, through the walls of which the generative 

 organs (?) shine with a creamy orange colour. Physa transparent 

 white, with opaque white suckers. Throughout the whole length 

 of the column the insertions of the mesenteries appear as white 

 lines. Tentacles of same colour as capitulum, but more trans- 

 parent, with four madder-brown rings on the internal aspect, of 

 which the two lower are usually V-shaped ; on the outer aspect 

 of the base of each tentacle is a pair of slightly diverging brown 

 lines. Disc of same colour as tentacles, with 12 inter-radial 

 sulphur- coloured lines, extending from the mouth to near the 

 base of the tentacles where they become brown in colour; near 

 the base of each tentacle is an imperfect madder-brown oval 

 ring, bounded externally by a sulphur- coloured streak ; there is 

 a second similar streak below the lowermost tentacular ring. 

 Mouth pale orange. 



