BY J. J. FLETCHER, M.A., B.SC. 953 



cylindrical sac, a proximal longer and narrower duct or stalk which 

 is bent or coiled, and a very small rudimentary caecum or 

 appendage attached to the stalk, wider than high and having on its 

 apex three or four faint elevations. The distal portions of the 

 anterior spermathecaB are apt to be displaced so that they may be 

 found in either of the two preceding segments. On the outer side 

 of each genital duct just as it passes through body wall is a small 

 hemispherical pouch, whose apertures doubtless are those visible on 

 the exterior. In one specimen there is a median one under the 

 nerve cord a few segments further back. 



There are about seven pairs of hearts the last of which is in 

 xiii, and of which those in the segments containing the diverticula 

 are the largest, especially the last two or three. 



Small tufted masses attached to the ccelomic wall are probably 

 the segmental organs ; they are larger in the anterior segments. 



Sab. — Hornsby (20 miles from Sydney), N.S.W. 



Obs. — Six specimens obtained in September under logs. These 

 worms do not agree very closely with those previously described 

 as C, rusticus, but as I wish to avoid multiplying genera they are 

 placed here for the present. 



12. PERICHiETA TEXAX, n. Sp. 



(Plate XIII, fig. 4.) 

 The largest of four specimens comprises 133 segments, is 123 

 mm. long, 5 mm. broad, and has a pre-clitellar region 22 mm. long. 

 Body cylindrical, tapering anteriorly and posteriorly, in spirit- 

 specimens narrow at the clitellum. Colour dark red above, 

 below whitish or with a tinge of brownish-yellow. Prostomium 

 pear-shaped, extending back on the buccal ring for nearly its whole 

 width, marked inferiorly and anteriorly by a continuous longitudinal 

 groove, and divided by a transverse groove just behind the anterior 

 margin of the buccal ring. From about vn to xvn the segments 

 are widest (some of them 2 mm.) and except for the setigerous 

 ridge are nearly flat and less convex than usual. After about v the 

 segments are tri-annulate, the setse being situated on the middle 

 ridge-like annul us. 



