84 The Museum Gazette 



the Pagurus Bernhardus, or Hermit Crab, which blunders 

 along among stones, rocks, and seaweeds with his double 

 burden, the uppermost of which does no # t seem daunted by the 

 dangers of his passage. The anemone generally keeps his 

 disc expanded when he receives a concussion which would 

 make most of his brethren hide their diminished heads." , 



Fig. II. This plate represents one of the tentacles of the ; 

 anemone magnified. 



This anemone throws out with great readiness the long 

 adhesive threads which characterise its genus, and they appear 

 to be particularly adhesive and injurious (Sowerby). By their 

 means little fish may be killed. Fish so taken may serve as. 

 food for the crab. 



Actinia parasitica is a large anemone, sometimes attaining 

 the height of three or four inches without contracting its 

 column in girth. In Dr. Johnston's plate it is shown of 

 natural size. It is not one of the most beautiful, its skin being 

 of a sandy-greyish colour and warty. It has lengthwise stripes 

 of brown or purple. 



No. II. — The Lobster Horn. 



This illustration is copied from another of the beautiful plates 

 in Dr. Johnston's British Zoophytes (plate xix.). Its central 

 object is a representation of the " Lobster Horn" (Antenmdaria 

 antennina) one of the finest of the Hydra-medusae. Its name 

 is taken from the resemblance of its branches to the antennae 

 or horns of the lobster. These horns are but seldom branched. 

 They are often six or eight inches long. Although so plant- 

 like in its mode of fixation and growth, this curious structure 

 is, like others of its class, an associated colony of animal 

 polypes. These polypes are of two kinds ; the one, hydra- 

 form, smaller, and more numerous, remain attached, whilst 

 the other, medusa-form and much larger, develop into free 

 swimming medusae or jelly-balls.. Both kinds are shown in 

 the magnified portion which constitutes Figure III. In this. 



