33 
is common in fairly deep water on this coast ; the Bull- Head, how- 
ever, which contained the parasites was from the rock pools close 
to the shore. The encysted stage of P. squamatus was found by 
Levmsen in the skin and muscles and outside the pyloric eseea of 
the Bull-Head, so that there is probably no intermediate host. 
Kemains of small Crustacea was all the food found inside my 
specimens of the Bull-Head, but that it is an indiscriminate feeder 
is shown by the list of creatures forming its food which is given 
by Levmsen. 
The life history of P. squamata is therefore possibly the Mb*, 
mg:— First host, Modiolaria discors ; intermediate host, omitted- 
nnal host, Cottus scorpius. 
Prosorhynchm grandis, n. sp. (Plate I., fig. 5). A species of 
Prosorhynckus very much like P. squamatus but constantly larger 
and also slightly differing in other particulars, occurs in the pyloric 
cieca of the Cod, always singly (June, August-November) and 
once was found in the Whiting (December), several specimens 
together in the pyloric c*ca and pyloric portion of the intestine. 
spties *** WaiTanfc ' 1 ^ US bdng rogarded as a new 
ne^LZ^T^rr 2 ~ 2 ' 5 ^ hl l0ngth; ****** breadth 
near the anterior end 0-7 mm. The rostellum measures 0-20 mm 
broad and 0-12 mm. long. The mouth is central, with the oral 
sucker measuring 0-10 mm. across. The intestine, vitellaria, ovary 
ami testes are hke P squamatus. The excretory vesicle readies to 
the level of the centre of the intestine. The vesicula seminalis is 
broader than that of P. squamatus, especially the portion outside 
be cirrus sac. The eggs are numerous, measuring 0-033 mm 
long, and are pale yellow. 
This worm occurred in four Cod and in one Whiting 
lhe life history is unknown. 
Sub-Order— Prosostomata, Odhncr. 
Family— Diatom id<v, Mont. 
QESts—Steringopliovus, Odliner 
Suringophon. furciger (Olsson). (Plate I., figs. 6-7.1 Odliner 
"launa Arctica," page 805. "uunei, 
This Trematode which has been fully described by Levinseu * 
M ^Odhner.MM.rf the commonest on this coast. It occurs in 
* Op. cit., page 61. ~ ' 
