60 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



Hub. Elizabeth Island, Straits of Magellan, 6 fathoms, on Fucus. 

 Three colonies or parts of colonies. 



Obs. In some specimens the regularity of the arrangement of the 

 cells in transverse rows and the length of the free portion of the 

 cells is greater than in others. The most characteristic points appear 

 to be the moderate expansion of the head of the lobes, the continua- 

 tion of the transverse series of cells over the top of the ridge and 

 consequent absence of a median bare line, and the distinctness of the 

 cells in the rows. D'Orbigny's figures represent the form with the 

 shorter cells and less regular transverse series of cells ; the alterna- 

 tive form here described may be called var. serialis in contrast. A 

 specimen assigned with doubt to this species consists of a broad 

 expanded lobe, and bears a flattened trumpet-shaped ocecial orifice 

 having exactly the characters of^that described above in T. organizans, 

 d'Orbigny. 



Endoprocta. 



Pedicellina australis, sp. n. (Plate VI. fig. 8.) 



Individuals arranged with great regularity along the creeping 

 stolon, 1-8 millim. apart from each other. Length of pedicel and 

 body together about 2\5 millims., body 1 millim. Tentacles about 12 

 in number, subequal, length about half that of body, slender. 

 Pedicel, diameter (in glycerine, under cover-glass) just above 

 base '35 millim., tapering to about •25 when within 3 diameters 

 of the body, ultimately constricted to 'I millim. at junction with 

 body. Body subtransparent. Colour whitish, with the exce{)tion 

 of the stomach, which is yellowish. Shape of body subglobular 

 when closed, superior margin straight and crenated by about 60 

 small inequalities. 



Stolon regular in its diameter, viz. '17 miUim. A transverse 

 septum, of which, as in the case of that of the j)edicel just below 

 the body, the cuticle forms a part, occurs at each side of the point 

 of origin of an individual, generally at about '5 millim. from this. 



Examined. In spirit and in glycerine. 



Hub. Sandy Point, in company with a Halecium, creeping over 

 large flexible worm- tube, 7-10 fathoms. 



Obs. About a square inch or Ig inch of the tube is covered by 

 the creeping stolon ; the specimens are very well preserved in spirit ; 

 but, unfortunately, the individuals are all more or less closed. In 

 the cases in which the tentacles were extended, the disk was not 

 expanded ; so that the origin of the tentacles from it was not clearly 

 seen. It is perhaps most closely alHed to P. americana, Leidy, but 

 approaches most nearly to P. belgica, Van Beneden, of any of the 

 European species, as far as the account of that species goes. 



It differs from the latter species in the proportional length of the 

 tentacles to the body, which is only about 1 : 2, as against the almost 

 1 : 1 of that species; in the proportional shortness of the pedicel 

 to the body, which is To millim. to 1 millim. against 2*85 millims. to 

 ■5.5 millim., which is the case in P. belgica. The individuals are I'S 

 millim. from each other, arranged along the tubular stolon, and not 



