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Show 1889.J ON ENTOZOA IN T H E BRITISH MUSEUM. 321 the ape is always able to perceive this distinction (she will search long and patiently for a straw of any colour when told that it occurs somewhere in the general litter of white straws constituting her bed, and eventually pick it out), while she cannot be taught to distinguish any of the others, I conclude that her failure in this respect is not due to any want of intelligence, but to some deficiency in her powers of colour-perception. 2. Notes on some Entozoa in the Collection of the British Museum. By FR. SAV. MONTICELLI 1. [Eeceived May 18, 1889.] (Plate XXXIII.) Thanks to the courtesy of Dr. A. Gunther I have been able to examine the helminthological collection of the British Museum (N.IL), and to study closely the typical specimens of von Siebold and Baird which are contained therein. On the present occasion I shall merely make some remarks upon a few of the more interesting new species or such as are not well known. Other observations I hope to embody n a larger forthcoming paper. TREMATODA. 1. AMPHISTOMUM TRUNCATUM, Rud. Ent. Syst. pp. 91 et 389. I have found many specimens of this species taken from the intestine of a Phoca vitulina. M y observations enable m e to complete the description as follows:-Body elliptical, compressed or cylindrical, according to the state of preservation, with posterior extremity obtusely truncated and covered by fine spines, which in the anterior third are large, become gradually smaller in the middle third, and invisible in the posterior third. Posterior sucker large, rounded, very prominent; pharynx of moderate size ; oesophagus short; intestinal cseca long. The genital antrum placed in the anterior part of the body and surrounded by an elevated edge ; it resembles a sucker ; testes large and occupying the posterior part of the body ; ovarium small, and uterus not much extended. Vitellaria disposed laterally and limited to the middle part of the body; vagina opening dorsally. 2. DISTOMUM VELIPORUM, Creplin, in Wiegmann's Archiv, 1842, p. 336, tab. ix. There are in the collection specimens of this species found in the stomach (a) of an Acanthias (vulgaris?) presented by Dr. Chapman, (ft) of a Scymnus, sp., from Madeira, (y) of a Torpedo fairchildi from Dunedin (New Zealand),presented by the Otago University Museum; and in the body-cavity of a Raja nasuta from Dunedin (New Zealand). The Acanthias, Torpedo fairchildi, and Raja nasuta are new hosts 1 Communicated by Dr. A. Griinther, V.P.Z.S. |
