248 ilyantiiid^e. 



Mouth. A line without distinct lip ; not elevated on a cone. Furrowed 

 within. 



Colour. 



Column. Drab or dirty white ; the septa distinct as white longitudinal 

 lines ; the swollen bladder-like extremity translucent, and almost colour- 

 less, except for the septa. 



Disk. Marked with a pretty star-like pattern, consisting of a pale blue 

 area, inclosed in a pale line, and surrounded by twelve triangular rays of a 

 dark brown hue ; each triangle surmounted by a pale "VV-like figure, 

 which incloses a dark brown area, according to the accompanying pattern. 



Tentacles. Pellucid brown, the front crossed by six semi-rings of opaque 

 white, of which the second, the fourth, and the fifth (counting from the 

 foot upward) are angular, the second pointing downward, the fourth and 

 fifth upward. The pellucid interspaces are tinged with brown, deepest 

 on the first, second, and fourth ; and the first white ring, surrounding the 

 foot, is sometimes tinged with sulphur- yellow. 



Mouth. Yellowish-white. 



Size. 



Specimens reach to an inch and three-quarters in length, and one-eighth 

 of an inch in average diameter ; the extremity is frequently inflated to 

 one-fourth. 



Locality. 

 Coast of Cornwall : buried in sand at low water, and in tide-pools. 



This is a very interesting little zoophyte, which was 

 first made known by Mr. C. W. Peach, who has faithfully 

 described its person and manners. Its lack of an expanded 

 base of course removes it from the genus Actinia ; and 

 when I formed the genus PeacMa, it was under the sup- 

 position that the present little species was to be therein 

 included. Subsequent personal acquaintance with it, 

 however, induced me to constitute a new genus for its 

 reception, to which I have since added a second species. 

 The name of this genus, Halca?npa, formed from a\-?, the 

 sea, and fcd/j,7rr}, a maggot, alludes to the grub-like form of 

 the animal; a form which I commemorate also in the 

 English name, pintht, from pintle, an iron pin. The 



