VINSONIA STELLIFKRA. !-."> 



considerably beyond the body of the female, suddenly 

 dividing into seven distinct rays or arms, one anterior 

 and three lateral, each of which has the tip opaque, 

 snow-white, and faintly striated longitudinally; the 

 anterior pair of lateral arms are strongly and sharply 

 ridged, and there is a very narrow, opaque, snow-white 

 line of secretion along the ridge of each ; there are also 

 four similar but much smaller appendages at the 

 extremity of the anal margin, of which the outer pair 

 are much the longest and stoutest ; and there is a 

 central dorsal boss of the same snow-white material. 



Wide, 2-3 mm. 



Old adult female (PI. XLIII, fig. 4), denuded of 

 its cereous test, orange-brown or chestnut-brown, 

 varying according to age ; the oldest examples are 

 darkest; form more or less hemispherical, slightly 

 compressed at the sides, cephalic extremity produced 

 and articulated ; posterior extremity with a horn-shaped 

 process, carrying the angular anal lobes and anal ring ; 

 the whole body is highly chitinised, very strong, and 

 opaque. Cephalic projection (PI. XLIII, fig. 5) on the 

 ventral surface with a series of circular spinnerets, 

 taking the same contour as the margin, and there are 

 also numerous larger glands or pores which gradually 

 diminish towards the margin ; dermis forming the 

 articulation thin and non-chitinised ; it also bears a 

 number of glands (PL XLIII, fig. 5 a). Antenna (PI. 

 XLIII, figs. 6, 6 a), attached to cephalic extension at the 

 point of articulation with the body (fig. 5), of six joints, 

 of which the third is much the longest ; the first joint is 

 highly chitinised at the base, but transparent towards its 

 articulation with the second ; formula 3, 2, 1 (4, 5, 6), or 

 3,1, 2 (4, 5, 6). Rostrum (PI. XLIII, fig. 5) arising from 

 the centre of the cephalic articulation, small ; mentum 

 uniarticulate ; rostral loop short, and not extending 

 beyond insertion of anterior legs. Stigmatic area 

 (PL XLIII, fig. 5//) deeply emarginate, with about 

 twelve short spines ; spiracles (PL XLIII, fig. 12) 

 trumpet -shaped, but with a projecting lip, as in some 



