BY J. J. FLETCHER, M.A., B.SC. 955 



segments ; the short oesophagus occupying about a segment is 

 followed by the large muscular gizzard in v, bounded posteriorly 

 by the thin mesentery between v and vi, and which being 

 pushed backwards by the large gizzard is invested by the next 

 mesentery behind it ; the small intestine extends back to xv, and 

 in segments xi to xiii is provided with three pairs of pouch-like 

 diverticula ; and the sacculated large intestine commencing in xvi, 

 which is not provided with caeca. As in other worms there are 

 strong ligaments connecting the posterior margin of the pharnyx 

 with the anterior rim of the gizzard. 



There are two pairs of testes in segments ix and xn, hardly 

 racemose, the first pair attached to the posterior mesentery, the 

 second to the anterior one ; the two pairs of ciliated rosettes 

 occupy the two intermediate segments x and xi, the vacant portions 

 of the cavities of which were filled with coagulated masses of fully 

 developed and advanced stages of developing spermatozoa, but 

 whether these were enclosed with the rosettes in delicate 

 membranous sacs, or whether simply discharged into these segments, 

 and coagulated by the spirit, was not easy to decide ; the posterior 

 portions of the vasa deferentia doubtless join the prostatic ducts, 

 but I could not trace them in the two specimens dissected ; there 

 is a pair of prostates partly in xvni and partly in xix, incompletely 

 divided into three portions by two transverse constrictions ; the 

 very short genital ducts without any £7"-shaped bend pass straight 

 to open on to the exterior. The ovaries in xiii, and the two oviducts 

 partly in this and in xiv have the usual situations and relations ; 

 the two pairs of spermathecse are in vin and ix, narrower than in 

 P. australis, and each has a club-shaped caecum, shorter than the 

 main pouch, not dilated at the tip. 



In many segments the portions of the dorsal vessel between the 

 mesenteries present indications of being incompletely double ; there 

 are transverse hearts in segments vi to xn, of which the last three 

 pairs are conspicuously large. Small tufts of glandular tubules 

 attached to the coelomic wall are probably segmental organs. 



Hab. — Auburn near Parramatta, N.S.W. 



