PARASITIC WORMS LEIPER AND ATKINSON. 57 



O\vin<4' tu tin' alisence iif suckers. Welch created a separate genus Abothros for his 

 s|ieci]iicii. Our material dues not appear to differ from his species .1. carcharias. 

 \\elch uierelv states that the miinlier of hooks on each rostelluni is aliout 'JOO. 



SUMMARY AND ( '(N( 'LTSloXS. 



A\ e llo\V Summarise the species that have Keen collected liV the Various Antarctic 

 Expeditions up to the present lime. The species descrilied as ue\v in the corresponding 

 Reports are indicated liv an asterisk. 



Ross's Antarctic Expedition, 1841-4. 2 species (both new). 

 ( ' KSTODA : 



ephalus antarcticus (Baird). 



ini ::: il' ri. Baird. I M .").".. 



National Antarctic Expedition, 1901-4 ("Discovery"). I species (.". new, I previously known). 

 ('KSTODA : 



DibotJiriocephalns untm-i-tli-iis (Baird), l^.V". 



*<;. Sliiplry, 1 '.!()". 

 ;/*.,;, Shipley, 1907. 



XK.MATODA: 



L/eptosomatum austrnle. 



Scottish National Antarctic Expedition ("Scotia") 17 species (8 new, 5 previously known, 

 4 doubtful). 



CESTODA : 



*Dibothriocephalu8 scoticus, Rennie and Ruid, 1912. 

 ,, I'niitui, Rennie and Reid, 1912. 



initiii-i'lii-iiK (Baird), 185.'5. 



,, iiinliili.1. Itennie and Reid, 1912. 



I'lli/iixci'llx, Rennie and Reid, 19 ll'. 

 Anchistrocephalus i/r/-.v^//n//ix (Rud.), 1819. 



Ill/Ill' III']' /IIS Sp. ? 



I'lii/Hulii'tlii-iiim sp. ? 

 Tetrarhynchus sp. ? 



XKMATODA : 



(parasit ic) : 



*Ascaris radiata, \. Linsi., I'.KM'I. 



i-fi-liiiii/iilii, \. Linst., 1906. 



i*fiiliit<i, Iliid. |so2. 



diomedeae, v. IJust., l.^ss. 



iiKi ili'iiliiliini, v. J^inst., I'.ioi;. 

 it'rce li\ inv') : - 



Tlii'i'iii'miti'iiui .-< In.iiiui, \. Llllst., IS'.Mi. 



AC A XT I K )CEPH ALA : 



* Echinorhynckus antarclicus, Reimie, I'.i'iii. 



