Abranchus, where the caeca arc entirelv free, iii Pontobdella, where the fusion between 

 tin-in is complete ami results in a single large caecum. In ( '. levigata tin- fusion 

 referred to is nut <]iiitc complete, the ends ui' llicrarca an- tivr 1'ur a short ilisiaiicc 

 and (hen- arc indications of another gap hetueen them anteriorly. 



'I'h,' ri'i'nxhiftin' organs (see Fig. J) arc of (airly simple structure. The lar-c and 

 globular terininal portions of tin- ejaculalory canals open into a slmrt bursa which 

 ends exteriorly in the male orilice : and a curious feature <-oii>ists in the reduction OJ 

 the number of testes to four pairs. 



The male genital orifice is situated in the middle of ring IS, that is, in the first 

 ring of Somite XII. The female orifice lies between rin'j- I'.i and 20. which form 

 respectively the second and third rings of the same somite. There i< no copulatory 

 area of the kind deserilied hv l.rumpt ( I DO I ) in /'/'xr/V,7,/ and Cystdtramhus, &D.& the 

 female organs dear a general resemblance to the Glossosiplionid type. 



'/'//. coelomic *i/*(< nt shows the simplification associated with the absence of lateral 

 pulsating \csicles. As far as could lie ascertained, there are no lateral sinuses or 

 segmentally recurrim: communications lietween the dorsal ami \entral >inuses. A mure 

 definite [ironuuiicement would he unwise in view of the limitations of the material. 



< )/ lli>' m-/'/ii'!'/iti/ .->/*!< in for the same reason, little can lie said. No internal 

 openings could lie dejected and no information could lie gathered regarding the type of 

 nephridial network, of which some indications were apparent. 



Sici'. The following measurements were taken from the largest individual in the 

 collection. 



Total length _".) mm; greatest width of liodv :'. '5 mm; ditimeter of anterior 

 sucker 1 -5 mm : length of posterior sucker 4' 5 mm ; width of posterior sucker 4 mm. 



( Kir knowledge of the [chthyobdellidae is still in an unsatisfactory state. 



In this family of Hirudinea perhaps more than in any other, an analysis of tin- 

 external characters alone has heeii found to lie insufficient for the discrimination of 

 genera, and many of its more delicate members are extraordinarily difficult to preserve 

 with all their diagnostic features intact. 



There are a number of Ichthvobdellid genera which have not been liillx 

 in\estigal(-d. and although ('///<'//<'//</ It rii/afu presents a group of features hitherto 

 undeseribedj it is not without hesitation that I have called into being another new 

 genus in which the internal structure has not been completely worked out. 



LITERATURE. 



.IIIHANSSOV. I,. ]S|)8. ' Kini.i;i- systcni.-itiscli w l.-lit I.L"- 'I'licili- dcr inncivn ( )r^;inis;iti(in ilt-r Ic-litliyn- 

 lidclli(U-n.' /.Mil. An/., XXI, p. 581. 



I'.KfMPT, E. 1901. " Reproduction il.-s I lini(lill(''cs." Mrlli. S.M-. /mil. cle IM.-III.T. XIII. )i L'Sli. 



HKNHAM, AV. B. I'JO'.I. I'rcliininnry l!r|Kirt cm tun llinidiiiiM from tin- Suli;int;irctic- Isl.-inds <it' 

 Xe\v Zt-aliind."- Sulijtiitiirrtii- Islands of New Xc;i];nid. \\'cllini;l.iii. N'./.. Aitii-lc X \" I . 



