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Show 324 SIGNOR F. S. MONTICELLI O N [June 4, in the anterior third of the proglottis; exceptionally they are with a single genital orifice. Length of complete specimen existing in the collection 55 millim. 11. TETRABOTHRIUM MACROCEPHALUM, Rudolphi, Ent. Hist. pt. iii. p. 61. Teenia sulciceps, described and figured by Baird (P.Z.S. 1859, p. Ill, pi. lvi. figs. 1, la, lb) 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 Teenia 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 Diomedea 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, enlarged, 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. PELICHNIBOTHRIUM 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. TAENIA FALCIFORMIS, Baird, Cat. Entoz. Brit. Mus. p. 116; P. Z. S. 1853, p. 24, pi. xxx. fig. 3. (Plate XXXIII. fig. 17.) Baird described the rostellum Of this Teenia as unarmed, but with a mark of doubt. I have observed 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. TAENIA CALVA, Baird, Cat. Ent. p. 83 ; P. Z. S. 1853, p. 24, pi. xxxi. figs. 1, la. (Plate XXXIII. figs. 18, 19.) There are in the collection numerous specimens of this species |
