84 
great abundance in the Dab, one of Olssons 
Sweden, also in tbe Long Bough Dab, the second of Olsso . . ho. , 
the Witch * Lemon Dab,* Plaice and Angler.* Those ma. bed are, 
be^ve, new hosts. Levinsen and Odhner found it m other &sh 
in Greenland, and Stafford; records it m several A me an h^ 
Nicoll § records it from the Dab at St Andrews, which r apparenUy 
the only previous British record of this species. It iB-to be foun 
all the year round, and quite as abundantly m wine as m — 
It is most numerous in the Dab (in 85 per cent.), fauly nam ion 
n tbe Long Bough Dab (50 per cent.), and not so • <~ » * 
Witch (20 per cent.), Lemon Dab (in one out of thiee), Plaice (one 
out of 2), and Angler (one out of twenty) 
Tbe worm is spindle-shaped, 1-5—8 5 mm. miig, > 
greatly taeadth at 'the ventral sucker It is bngh red when 
alive, with golden-brown eggs, the colour of the body fad mg 
d roctly after death. When moving, it is often pear-sbeaped, with 
tbe broad end foremost, and is very active and contact le^ The 
suckers are both round, oral smaller than ventral in th F°P°^ 
of about 8:5 (oral suckers in a specimen 8 mm. long, 0 mnu 
across- ventral, 0-35 mm.). Cuticle unarmed. Theie is « very 
small prepbarynx, conspicuous pharynx, and oesophagus the same 
TgtliVthe Pharynx. The intestinal lobes are ^ 
a short way beyond tbe testes. The excretory vesicle is Y-shaped 
be stgTe stein forking between tbe testes, and the forks reaehm 
to the level of the pharynx ; the substance con ained n the ve.ds 
is highly refractive, and appears intensely black by t^nsmittea 
gut The testes arc globulo-ovoid, and are placed -P"™^ 
one each side of the fork of the excretory system and ventral to 
2 intestinal lobes. From each a vas deferens goes to the ves.c 
seminahs, which is divided into two portans nd c mpletel 
pnrlosed in the cirrus sac. Ine cnrus sdi ^ b _ 
ltd on the left side and in front of the ventral sucker, containing 
t vesionla seminalis, well developed P-P-stat.ca a.Ki™ 
small cirrus. The male duct opens into the genital sum , and 
rLnUal pore is almost median but slightly to the left jus 
Wow S intestine. Tbe rest of the cirrus sac — s lar 
XZ cells The ovary is lobed and placed behind and to the 
g? of the ventral sucker, giving off po^torioriyjhej^ 
1 BSp4Ua£Sft&- B* xxviu « « 
§ bp. cit., page 72. 
