392 Mr. A. G. Butler on new Sjjecips Hist.' vol. vil. no. 4, p. 489, several speciinens in whicli tlie proboscis diverges at some distance above tlie ventral disk into two distinct branches. This may be, in some instances, the re-sult of accidental development, but is more frequently due to an obstruction of the anal canal. I found a S])ecimen of Bato-crinus longirostris in which, close to the vault, the proboscis branches into two equally heavy tubes ; and there appears immediately above their junction a strong inflation or kind of abscess. In another specimen a stoppage or disconnexion must have occurred within the body, for a second proboscis was formed at the ventral disk, developed here, as in every other instance, within the anal series or posterior side of the Crinoid. In one remarkable specimen a second proboscis breaks forth even at the lower end of the calyx, just above the basal plates. The pressure against these parts must have been enormous ; for it caused the destruction of an entire ray, the plates of which are bulging out, forming, together with the anal plates, and in-termingled with smaller plates such as ordinarily compose the proboscis of this species, a large elongated cavity with a rather large aperture. All these instances give evidence of a pressure from within^ and indicate that the outside opening of Paleozoic Crinoids was solely an ejective organ, and could not have had oral functions. I have already mentioned that the anus is separated from the radial series by deep partitions at the inner surface of the vault, thus excluding an}' connexion with the upper end of the digestive organ. Moreover the casts of Aciinocrinus show that the course of the proboscis is directed toward the posterior side ; and the development of the abnormal proboscis occurs invariably in the anal series. It is therefore hardly necessary to argue on Dr. White's supposition, that the abnormal second proboscis, wherever it occurs, might have served as buccal orifice, as such a theory is unsupported by analogy. [To be continued.] XLV. — Descriptions of new Species of Heterocera from Japan.-— Part III. Oeometrites^. By ARTHUR G. BuTLER, r.L.S., F.Z.S., &c. Urapteridae. 153. Urapteryx veneris^ n. sp. White ; primaries crossed by three brown stripes, which converge towards the inner margin ; a discocellular litura of * The (jeometrites described in * Illustr.itions of Lepidoptera Hetero-cera ' are not included in this paper.
BioStor
