1889. ] ENTOZOA IN THE BRITISH MUSEUM. 325 
found in the intestine of Lagopus scoticus. The small rounded head 
hardly distinct from the long neck, provided with four circular and 
large suckers, has the rostellum armed with a small crown of very 
numerous and minute hooks (Baird said the rostellum was unarmed). 
The genital orifices are marginal, on one side. The ova are small, 
ovoidal ; contents a very small embryo, occupying about the fiftieth 
part of the total contents of the ova. 
16. TH£NIA MAGELLANICA, sp.n. (Plate XXXIII. figs. 15, 16.) 
I propose this name for a species of Tenia collected in Magellan 
Straits by Dr. Cunningham. This species, of a brown colour, 20-28 
millim. in length, is thus characterized :—Head subclavate, ros- 
tellum not apparent; suckers large, as wide as the head; neck deli- 
cate, of moderate length. Anterior part of the body thin, posterior 
gradually enlarged ; anterior segments small, following rectangular, 
the last trapezoidal. Genital orifices lateral, very small, and not easy 
to recognize. 
17. Tanta Brrart, von Siebold, MSS. ? (Baird, Cat. Ent. p. 79). 
This interesting species has been, so far I know, not yet described. 
It is characterized as follows :—Head small, triangular, with a conical, 
pointed, unarmed rostellum and a very small sucker; neck short. 
Anterior segments small, narrow, gradually enlarged and rectan- 
gular, last segments subquadrate. The generative organs are dupli- 
cated in each segment, with the genital orifices, which are lateral and 
prominent, on either side. The penis-sheath is large ; the penis of 
moderate size, armed with fine spines. 
Lengths of the specimens taken from the intestine of Nyroca 
leucophthalma 39-90 millim. 
EXPLANATION OF PLATE XXXIII. 
. Distomum microporum, Sp. n., nat. size, p. 322. 
Gigas, Dat. size, p. 322. 
—— ——, posterior sucker, x 8, p. 322. 
—— halosauri, x 38, p. 322. 
, anterior part of the body; from a microscopical preparation, 
Fig. 
. 322, 
; Diajmoctal serrani, sp. n., nat. size: attached to the gills of Serranus 
Jimbriatus, p. 822. 
. Bothriocephalus macrobothrium, sp. n., head, x 6, lateral view, p. 828. 
, head, x 6, anterior view, p. 523. 
, last segments, x 3, p.'323. 
10. — platycephalus, sp. n., head, magnified, p. 323. 
tetrapterus, head, magnified, p. 323. 
12. Phyllobothrium crispatissimum, sp. n., head, magnified, p. 324, 
13. Pelichnibothrium speciosum, g. et sp. n., head, x 6, p. 324. 
—, head from a microscopical preparation, p- 324, 
15. Tenia magellanica, sp. n., head, magnified, p. 325. 
16. —— , last segments, p. 825. 
17. —— falciformis, a hook, magnified, p. 324, 
18. —— calva, ova, much magnified, p. 324. 
19. —— ——, a hook, much magnified, p. 324. 
Proc. Zoou. Soc.—1889, No. XXII. 22 
pete ED Cas eM 
