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Show 80 DR. W. BAIRD ON THE GEPHYREA. [Feb. 13, Phascolosomum echinorhynchus, Diesing, Revis. der Rhyngod. I. c. p. 763, 1859. Hab. Bay of Naples (Chiaje). 8. SIPUNCULUS ROBUSTUS. Sipunculus robustus, Keferstein, Beitr. z. Anat. der Sipunc. in Nach. konig. Gesellsch. der Wissensch. Gotting. p. 196, 1865, Quatrefages, Hist. Nat. Annel. ii. p. 616, 1865. Hab. Wallis Islands, Oceania (Dr. Graffe fide Keferstein). 9. SIPUNCULUS ANGASII, sp. nov. (Pl. IX. fig. 1.) Corpus cylindricum, ineequale, infra medium contractum, laxe cla-thratum, longitudinaliter costatum et transverse striatum; apice caudali globoso-clavato, Icevi; proboscis brevis, crassiuscula, cylindrica, muricata, oris limbo papilloso; totum corpus irides cens. Long, corporis 6 une, crassitud. in medio corporis 8 lin., long. proboscid. muricat. 8 lin. Retractile portion of body, containing the proboscis, short, tolerably well developed, covered with numerous rather large triangular tubercles, the points projecting downwards. The tentacular membrane is divided in the centre into numerous short and somewhat conical papillae, forming, as it were, a pad at the extremity of the proboscis. Body contracted a little below the middle. The upper portion is much the larger, and for a short distance below the proboscis it is divided, for about half an inch, by several rather deep circular sulci. Then the grooves or ridges run longitudinally throughout the whole length of the body, which is cylindrical, and terminates at the lower extremity in a round-shaped club, smooth and shining. The grooves or ridges in the upper half of the body are rather distant from each other, and are crossed by faint transparent circular lines. Below the contraction the circular grooves are more decided, and the longitudinal grooves are crowded and of a wavy form. The whole body is shining, and of an opal iridescent hue, especially about the centre of the body. Hab. Port Lincoln, South Australia (Cr. F. Angas, Esq.). B.M. 10. SIPUNCULUS DEFORMIS, sp. nov. (Pl. IX. fig. 2.) Corpus sub cylindricum, ineequale, hinc et illinc valde constrictum, dense clathratum et tuberculatum, apice caudali subinflato, ovali, tuberculis parvis muricato; proboscis crassa, quintam partem longitudinis corporis eequans, tuberculis minimis rufis circulariter obsita; color corporis fuscus. Longit. 5i une, crassitud. major 4 lin. ; long, probosc. 1| une, crass, prope extremitat. 3 lin. Rectractile part of body, containing the proboscis, of considerable length, nearly equalling the fifth part of the bodv, roughened with numerous very small brown dots or tubercles arranged in circular rows, robust, of nearly equal thickness with the rest of the body, ex- |
