AiiTR^ACEA. 
ILYANTHID^. 
THE EOCK PINTLET. 
llaJcampa microps, 
Plate YII. Fig. 11 : XII. Fig. 6 (magn.). 
iipecijic Character. Tentacles sixteen, in two rows, very short, without 
markings. 
Hulcainpa microps. Gosse, Annals Nat. Hist. Ser. 3. ii. 195. 
GENERAL DESCRIPTION. 
Fob.m. 
Column. Cylindrical; 8-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 entangle.s foi-eign mattei's ; ordinarily covered avith 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 inchin medium di.ameter ; the second also of eight, marginal, remote, 
alternate with the former, pai)illiform, 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 cnidro scattered in their substance. 
Month. Elevated on a small abrupt papilko. 
CoLOUlt. 
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. 
