4 JOSEPH A. CLUBB. 



The height of body-wall is 4*5 cm., diameter of column 5*5 cm., and of oral 

 disc very slightly less. The body-wall is quite smooth and extremely membranous, 

 giving the animal quite an inflated appearance. The upper margin is slightly 

 crenulated by contraction of the sphincter ; the pedal disc is adherent and a little 

 firmer and thicker than the body-wall ; the oral disc has slight radiating folds running 

 outwards, up to and between the tentacles ; the oesophagus is strongly corrugated, 

 and the two siphonoglyphs are visible, but not markedly distinct. The tentacles are 

 stout, in four cycles (12 -f- 12 -f- 24 -(-48 = 96) ; in the innermost cycle about 1 cm. 

 long in the contracted condition, and diminishing slightly in length in the outer cycles. 



The sphincter is mesogloeal, occupying almost the whole of the mesogloeal layer, 

 and projecting as a distinct collar, with the ectodermal epithelium, and forming a deep 

 fosse between it and the tentacles. Fig. 7 on PI. 2 shows a radial section through 

 the sphincter. The muscles of the oral disc (PI. 2, Fig. 7) and tentacles (PI. 2, Fig. 8) 

 are mesogloeal. The longitudinal muscles of the mesenteries are in the form of slender 

 strands, which may be seen running more or less parallel to each other over the extremely 

 delicate and membranous mesenteries. In transverse section (PI. 2, Fig. 11) it is seen 

 that the mesogloea is extremely thin throughout, but is slightly thickened and bears 

 short slightly branched lamellae for the muscle strands. The parieto-basilar muscle 

 is small and insignificant. Two cycles of mesenteries are complete, and the pairs of 

 directive mesenteries bear the usual relation to the siphonoglyphs. All the complete 

 mesenteries are fertile, including the directives, and ova in various stages are seen 

 (PI. 2, Fig. 9), and a figure is given of a section of the somewhat characteristic 

 mesenterial filaments (PL 2, Fig. 10). 



I have identified this specimen with Paractis papaver, the Actinia papaver of 

 Drayton, briefly described and figured by Dana (4, p. 143, PI. 4). 



Genus Actinostola, Verrill. 



Paractidse usually of large size, with a firm leathery wall, which may be 

 corrugated or folded, but with no verrucas. Margin tentaculate. Tentacles relatively 

 thick, and not enlarged at the base. The pairs of mesenteries in certain cycles arc 

 unequally developed, having one of each pair smaller and narrower than the other. 



ACTINOSTDLA CHILENSIS. 



Actinostola chilensis McMurrich, Zoolog. Jalirb., Supp. VI. (Fauna Chilensis iii.), (1905), p. 247, Pis. 15 

 and 16, Figs. 30-33. 



Five specimens of large size contained in one bottle labelled " 4.3.04, 254 fathoms, 

 mud and stones." The locality is not stated on the label, but I am informed that the 

 position was 67° 21' 46" S. and 155° 21' 10" E. The specimens vary greatly in form 

 and size. One specimen measures 5 • 5 cm. in height and 4 cm. in diameter of 

 column ; another is 4 cm. only in height, but 6 cm. in diameter. 



The wall is firm and leathery, smooth to the touch, and no verrucfe or tubercles 



