80 DR. W. BAIRD ON THE GEPHYREA. [Feb. 13, 



Phascolosomum echinorhynchus, Diesing, Revis. der Rhyngod. I. c. 

 p. 763, 1859. 



Hab. Bay of Naples (C^io/e). 



8. SiPUNCULTJS ROBUSTUS. 



Sipunculus robiistus, Keferstein, Beitr. z. Anat. der Sipunc. in 

 Nach. kouig. Gesellseh. der Wissensch. Gotting. p. 196, 1865, 

 Quatrefages, Hist. Nat. Auuel. ii. p. 616, 1805. 



Hab. Wallis Islands, Oceania (J)r. Gr'dffe fide Keferstein). 



9. Sipunculus angasii, sp. nov. (PI. IX. fig. 1.) 



Corpus cylindricum, inceqtiale, infra medium contractum, hixe cla- 

 thratum, longitudinaliter costatum et transverse striatum ; apice 

 caudali globoso-clavato, Icevi ; proboscis brevis, crassiuscula, 

 cylindrica, muricata, oris limbo papilloso ; totum cojpus iri- 

 descens. 



Long, corporis G unc, crassitnd. in medio corporis 8 liu., long. 

 ])roboscid. muricat. 8 lin. 



Retractile portion of body, containing the proboscis, short, tole- 

 rably well developed, covered with numerous rather large triangular 

 tubercles, the points projecting downwards. The tentacular mem- 

 brane 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 

 j)ortion is much the larger, and for a short distance below the pro- 

 boscis 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 trans- 

 parent 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 (G. F. Angas, Esq.). B.M. 



10. Sipunculus deformis, sp. nov. (PI. IX. fig. 2.) 



Corpus subcylindricum, incequale, hinc et illinc valde constrictum, 

 dense clathratum et tuberculatum, apice caudali subinjlato, ovali, 

 tuberculis parvis muricato ; proboscis crassa, quintam partem 

 longitudinis corporis aquans, tuberculis minimis rufis circulariter 

 obsita ; color corporis fuscus. 



Longit. 5| unc, crassitud. major 4 Un. ; long, probosc. 1| unc, 

 crass, prope extremitat. 3 lin. 



Rectractile part of body, containing the proboscis, of considerable 

 length, nearly equalling the fifth part of the body, roughened witli 

 numerous very small brown dots or tubercles arranged in circular 

 rows, robust, of nearly equal thickness with the rest of the body, ex- 



