324 SIGNOR F. S. MONTICELLI ON [June 4, 
in the anterior third of the proglottis ; exceptionally they are single, 
with a single genital orifice. 
Length of complete specimen existing in the collection 55 millim. 
11. TETRABOTHRIUM MACROCEPHALUM, Rudolphi, Ent. Hist. 
pt. ili. p. 61. 
Tenia sulciceps, described and figured by Baird (P. Z.S. 1859, 
p. 111, pl. lvi. figs. 1, la, 14) from the intestine of Diomedea 
exulans, is only a specimen of this species of Rudolphi, which had 
not previously been found in Diomedea. 
Again, the Tenia diomedea, n.sp. (?), described recently by Linstow 
(‘ Challenger’ Report, Entozoa, p. 13) from Diomedea brachyura, 
is a specimen of Tetrabothrium macrocephalum, and probably the 
Tetrabothrium torulosum described by the same author from Dio- 
medea brachyura is only a synonym of the same worm. 
12, PHYLLOBOTHRIUM CRISPATISSIMUM, sp. n. (Plate XXXIII. 
fig. 12.) 
Very closely allied to P. lactuca and P. tridax, from which it 
may be easily distinguished by the larger head, the smaller bothria 
(which are extremely plicated with very small accessory suckers), by 
the broad and short neck, and by the very small size of the segments 
of the body, only gradually enlarged near the extremity of the body ; 
the last segments are rectangular ; genital orifices marginal. 
Lengths of the specimens 140-190 millim. Unfortunately the 
host of this new species is unknown. 
PELICHNIBOTHRIUM, gen. nov. 
Head with a large pyramidal haustellum, anteriorly truncated and 
provided with a well-developed terminal sucker; bothria four, en- 
larged, like a basin, completely adherent to the head, each with an 
accessory sucker, scrobiculiform, and disposed in couples on each side 
of the head. The bothria of each couple are very near together. 
13. PeELICHNIBOTHRIUM SPECIOSUM, sp. n. (Plate XXXIII. 
figs. 13, 14.) 
There are many specimens taken from Alepidosaurus ferox, from 
Madeira. I was unable to discover true segments of the body or 
the generative organs. 
14. Tania ratcirormis, Baird, Cat. Entoz. Brit. Mus. p. 116; 
P. Z.S. 1853, p. 24, pl. xxx. fig. 3. (Plate XXXIII. fig. 17.) 
Baird described the rostellum of this Tenia as unarmed, but with 
a mark of doubt. I have cbserved that the rostellum, elongated, 
conical, and anteriorly subrounded, is armed with eight very slender 
and long hooks of a very characteristic form ; the neck is indistinct ; 
the genital orifices are marginal. 
15. Tanta catva, Baird, Cat. Ent. p. 83; P.Z.S. 1853, p. 24, 
pl. xxxi. figs. 1, la. (Plate XX XIII. figs. 18, 19.) 
There are in the collection numerous specimens of this species - 
