OCR Text |
Show 1868.] DR. W. BAIRD ON THE GEPHYREA. 89 shape, rather acuminated posteriorly, slightly narrowed in front. Along the hack it is marked with variously shaped reddish marks ; it is striated transversely, the striae distinct, marked with small, flattish, indistinct warts, and more sparingly with elevated brown granules. The caudal extremity is densely and rather strongly granulated, the granules of a reddish-brown colour and elevated. The proboscis at the root, next the body, is also densely granulated; anteriorly it is circularly striated, sparingly granulated, and ringed dorsally with reddish brown. The extremity of the proboscis, in the only specimen we possess, is withdrawn, so that the tentacles cannot be seen. 5. PHASCOLOSOMA FASCIATUM, sp. nov. Corpus cylindricum, transverse obsolete striatum, antrorsum attenua-tum, granulis parvis rubris obsitum, postice rotundatum, subito conicum, pars exsertilis perlonga, attenuata, Icevis, striis circula-ribus distinctis cincta, et in dorso fasciis latis rubris notata ; color albidus, maculis rubridis conspersus; tentaculis retraclis. Long. corp. 15 lin., proboscis corpore fere duplo longior ; lat. cor]). 2 lin., proboscid. 1 lin. Hab. Madeira (N. Lister, M.Di). B.M. The body of the worm is of a whitish colour, obsoletely transversely'striated, marked here and there with reddish-brown spots, and covered with small red granules, which are nearly similar in size anteriorly and posteriorly. It is more attenuated anteriorly, and sends out a very long proboscis, which is narrow, not tuberculated, but distinctly circularly striated, and fasciated with interrupted broad bands of brown. Posteriorly the body is blunt, but becomes suddenly pointed at the very extremity. The broad bands of brown on the proboscis, the marks of red on the body, and the small tubercles on the surface are all nearly confined to the dorsal aspect, the abdominal region being nearly white. Is this the Sipunculus Icevis, Cuvier= Phascolosoma Iceve, Keferstein? In the ' Zeitsch. f. wiss. Zool.' 1867, p. 50, Keferstein mentions having received a specimen 11 m m . long from Fayal, Azores; but in some respects his description differs from that of the species here given. 6. PHASCOLOSOMA PLACOSTEGI, sp. nov. Corpus fusiforme, breve, utrinque attenuatum, striis circularibus cinclum, fere Iceve, parte caudali acuminata, granulis majusculis obsita, parte anteriore verrucis complanatis sparsis instructa, parte exsertili circulariter striata; tentaculis absconditis. Long. corp. 10 lin., crass. 1 lin.; long, probose 3^ lin. Hab. Cape of Good Hope; found lodged in a mass of Serpulae (Placostegus). B.M. The body is fusiform in shape, a little attenuated at both extremities, rather more so at the caudal termination, which is somewhat acuminated and covered with raised warty-looking granules. The |