A NKW Sl'KVlKS 111- i:uNKI,l,l.\ .loUNSluN AM. IIK<iS. 76 



tliiit (lescril)etl by us t'oi- I'tti'inlohoiifl/iu'. 'J'lio si[)lioii is nearly 12 inclit's 

 in Iens;tli, and is .sunonnded by peritmieiim wliicli connects it postei-iorly 

 with the intestine. 'JMie posterior end of tlie siplion is about 1'8 inclies 

 fiom the point wlieie tlie mesentery attaches it to tlie gnt-wall (PL xv., 

 tie:. - : I'l- ^'^'i-^ fig- *>)• 



Into the cloaca, open tlie two anal vesicles. They are less elongate 

 tlian in 11. /■//■/i//.<. Into each open about tifteen tubes, some quite 

 short, otliers much longer (PI. xv., Hg. 4-; PI. xvi., tig. 7). These tubes 

 arive <ift' smallei' or larger numbers, at times very laige numbers, of 

 secondary nephridial tubes, each ending in a narrow neck which beai's a 

 cii"cular disc with the nephi-ostomial opening in its centre. The disc is 

 composed of a ring of compressed elongated cells, with sti'ougly staining 

 nuclei, and fringed with a, ring of cilia ( PI. xvi., tig. 8). ^Jfesenteric 

 strands pass from tlie body wall to the anal vesi(;les and to the large)' 

 tubes. 



'J'he vascular system is fairly typical. There is a narrow ventral 

 blood ves.sel bifurcating below the j)haiynx. Jt is joined by a very large 

 intestinal vessel which (PI. xv., Hg. 2) is seen as a definite structure 

 adjacent to the intestinal walls, especially posteriorly. 



The ovary i-esembles that of Jl. ririili.<. In one specimen it was only 

 slightly developed ; in the otliei" it was much larger, l.ying midventrally 

 along almost the whole of the lengtli of the animal. The ova are large 

 and round, with a prominent nucleus and a darkly staining nucleolus ; 

 the protoplasm is strongly vacuolated. The largest ovarian eggs measui-ed 

 0-()-l- mm. in dianietei'. 



There is a single utei'us situated on the left side of the body. When 

 empty it is a rather transpai-ent organ, about 1"2 inches long. Situated 

 at about ojieqmxrter of its length from the free end is the '' uterine funnel." 

 This is a jieculiar little organ, less than 1 mm. long, consisting of a short 

 hollow stalk, which wiilens out asymmetrically into a bi'oad leaf-shaped 

 opening, with a strongly crenated rim fringed with cilia. The internal 

 opening is on a level with the walls of the uterus, i.e., there is no valvular 

 mechanism such as occurs in Ffieudobdiicllin. The end of the empty uterus 

 is contracted into a blunt point showing strong longitudinal ridges, and 

 probably admits of a fair nmount of distension during sexual activity. 



Whiles were sought for in the co'lome, ])hai'ynx and uterus, hut wei'e 

 not detected. It should be noted, however, tliat neither specimen was 

 sexually mature. 



We have pleasure in associating witli this species the name o^ 

 Professor W. .V. Haswell, who has done so much to advance our know- 

 ledge of Eastern Australian Zoology. 



The type specimen of /.'. //.(,</'■''/// collected l)y ^Vhitelegge, is in tlie 

 collection of the Australian Museum. Svdnev, reg. no. (t. 11,220. 



• .L.hnsonan.lTiHus— I'loc. [.hm. Soc. N.S.Wides, xliv., 1W19. pp. 218-230. 



