CLAVELLA STELLATA. 221 



1900. Anchm-ella stellata T. Scott. (112) p. 178. 



1901. Anchorella stellaia idem. (113) p. 134, pi. viii, figs. 1, 2. 



1909. Anchorella stellata May E. Bainbridge. (3) p. 57, pL ii, figs. 

 38-42. 



Female. Cephalo thorax tolerably elongated and 

 slender, and appearing to be but a prolongation of 

 the coalescent second maxillipeds, having the head- 

 appendages at the end of it. Genital segment short, 

 moderately stout, ovoid in shape, and joined to the 

 cephalothorax by a narrow neck. Abdomen rudi- 

 mentary, appearing as a slightly produced middle 

 portion of the posterior end of the genital segment ; 

 on each side of the abdomen a small tubercle, which, 

 Avith the rudimentary abdomen, imparts a slightly 

 trilobed appearance to the end of the segment. 



The two pairs of antennas, the mandibles, and other 

 mouth-organs are apparently similar to those of 

 Clavella uncinata. The whole animal including the 

 maxillipeds appeared to be, in the living state, 

 surrounded by semi-transparent gelatinous matter 

 through which some of the structures could be plainly 

 seen ; the two second maxillipeds were visible within the 

 gelatinous investment, extending alongside each other 

 to where they joined the chitinous disk by which the 

 parasite was anchored to its host. All the specimens 

 observed were fixed to scales, and the chitinous fixture, 

 after piercing the outer surface of the scale, spread 

 out into an extremely thin and dark horn-coloured 

 circular disk ; the disk was ornamented all round with 

 pellucid, oval markings arranged at more or less 

 regular intervals and in the manner of radii which 

 did not quite extend to the circumference of the disk. 

 The parasite could not easily be removed without 

 also removing the scale to which it was attached or 

 by severing the attachment where it penetrated the 

 scale. The specimen represented by the drawing 

 (PL LXV, fig. 8) measured from the forehead to the 

 apex of the second maxillipeds about 6 mm., and the 

 genital segment about 4 mm. in length by fully 2 mm. 

 in thickness. 



