PLATE XL 1 1 I. 



IlEXARHIZITES INSIGNIS (p. SO). 



Natural size, from a photograph. ( After Haeekel). 



flij, a„. Mouth seam. 



</,. Three-sided pyramidal point at the end of the mouth seam, 



a,. Open remainder of the mouth orifice, not quite obliterated (?). 



b. End of the side limb of the mouth seam a, b. 



c,, c,,. Inner point of the perradial brachial area (point of bifurcation of the 6 arm seams). 



dj, (/,„. External ends of the 12 branches of the arm seams (corners of the 12-sided mid-field). 



<?,, <■,.,. Lateral angles of the 6 three-cornered genital cavities. 



/,./,,. Convex center of the ground line of the 6 three-cornered genital cavities. 



g v f/ c . Inner periphery or rounded point of the 6 genital cavities (subgenital lids). 



//. Periphery of the genital zone. 



i. Periphery of the smooth zone (ring canal). 



A,, k e . Peripheral portion of the 6 perradial canal's. 



/,. /,.. Peripheral portion of the 6 interradial canals. 



in. Marginal depression for the 6 perradial marginal bodies. 



n. Marginal depression for the 6 interradial marginal bodies. 



190 



