Zoology.} NATURAL HISTORY OF VICTORIA. XPolyzoa. 



they have usually the rostrum very small, and a very long, 

 vibraculoid, setiform mandible, but in others the avicularium is 

 large, the mandible being broad, short and triangular. 



The following varieties are figured : — 



Variety spicata (McG.). Zooecia finely granular, a stout 

 conical process from the front of the zooecium, below the pore 

 which it conceals, directed upwards ; avicularium Avith long 

 vibraculoid mandible. Ooecia prominent, granular. This resembles 

 a figure given by Hincks as var. Californica., but Busk (Q. J. Mic. 

 Sc, iv. 310) does not describe the peculiar process in his 

 L. californica which undoubtedly is also a variety of M. ciliata. 



Variety p)^'>'sonata (Busk). An extension of the sides of the 

 ooecium across the lower lip of the fertile zooecia. The zooecial 

 pore seems to be sometimes external to this hood or pouch and 

 sometimes enclosed within it. Avicularian mandible Ions: and 

 vibraculoid. It has been described by Busk (Brit. Mus. Cat., Mar. 

 Pol., pt. ii., p. 74, pi. xc, fi^s. 2, 3, 4 ; and Cliallenger Pol., pt. i., 

 p. 137) as a distinct species, in consequence of the peculiar growth 

 of the ooecium, a structui'e which occurs in several other species, 

 not only of this genus. Hincks has rightly (Brit. Mar. Pol.) 

 described it as a variety. 



Explanation of FienRES. 

 Plate 1 75. — Fig. 8, Microporella ciliata, variety spicata. Fig. 9, variety personata. 



Plate 175, Figs. 10 and 11. 

 MICROPORELLA MALUSII (Audouin sp.). 



VARIETIES PERSONATA AND THYREOPHOEA. 



This species has been already figured (PI. 36, fig. 7) and 

 described, but the following varieties require notice : — 



Variety personata (McG.). Zooecia elongated, smooth, with 

 very few stellate pvincta ; zooecial pore large, transverse, Ooecia 



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