ASTRjEACEA. ILTANTIIIDJB. 



THE ROCK PINTLET. 



Halcampa microps. 



Plate VII. Fig. 11 : XII. Fig. 6 (magn.). 



Specific Character. Tentacles sixteen, in two rows, very short, without 

 markings. 



Halcampa microps. Gosse, Annals Nat. Hist. Ser. 3. ii. 195. 



GENERAL DESCRIPTION. 



Form. 



Column. Cylindrical ; S-invected, the tegumental insertions of the septa 

 being the boundaries of the swellings ; hinder extremity inflatable, pro- 

 trusile, adhesive : skin minutely granular, enveloped in a thin mucus, 

 which entangles foreign matters ; ordinarily covered with minute, close- 

 set, transverse wrinkles. 



Disk. The rounded anterior extremity of the column, around which 

 the tentacles are planted in two contiguous circles (though those of each 

 row are remote inter se). Sometimes this rounded form is not observed 

 and then the disk is flat. 



Tentacles. In two rows; the first of eight, about .014 inch long, and 

 .0045 inch in medium diameter ; the second also of eight, marginal, remote 

 alternate with the former, papilliform, their length not exceeding their 

 diameter, or .005 inch. When expanded, those of the first row either stand 

 erect, or arch slightly outward : their movements are rather sudden ; their 

 form quite cylindrical, with round ends; their walls thick, apparently 

 imperforate ; a few cnidae scattered in their substance. 

 Mouth. Elevated on a small abrupt jmpilla. 



Colour. 



Pellucid yellowish white, positive in the ratio of opacity of the parts 

 without markings. Ovaries tinged with flesh-colour. 



Size. 



Column when moderately extended about .025 inch in diameter, to a 

 point about halfway down its length ; diameter of posterior inflation at the 

 same time .065 inch. Total length in this condition .3 inch. 



Locality. 

 South Devon ; rocks between tide-marks. 



