134 Descriptions of New, 



by the peculiar shape of the mouth and the vibracula, or 

 the mark of their attachment, which in the oldest speci- 

 mens is very conspicuous. 



Hincks notices a form from Bass's Straits as L. Poissonii 

 (Audouin), to which he doubtfully refers L. setigera. He 

 does not describe it, but gives as its remarkable peculiarity 

 the line of spines fringing the base of the cell for about 

 half its length, which are not described or figured by Smitt. 

 Smitt's and the present species are undoubtedly identical, and 

 it is probable that they are referable to L. Poissonii ; but as 

 I have not seen Savigny's figure of the latter, I have 

 thought it better to retain Smitt's name. 



Lepralia magnirostris, n. sp. Fig. 6. 



Cells large, confused, indistinct, surface with numerous 

 perforations ; mouth rounded above, nearly straight below, 

 peristome raised ; a very large avicularium on each cell 

 opposite the side of the mouth with the mandible projecting 

 upwards and inwards. 



Port Phillip Heads. 



In this species, of which all the specimens I have seen are 

 in the Hemeschara form, the polyzoary is thick, and the 

 posterior surface smooth. The cells are arranged in irregular 

 quincunx, with no distinct divisions ; they project slightly 

 forwards superiorly ; the mouth is raised, rounded above, 

 and nearly straight below. There is a very large avicularium 

 on each cell ; it is situated opposite the middle of the mouth, 

 the base being in the hollow between two adjacent cells, 

 and the mandible is directed nearly transversely inwards, so 

 that the point almost touches the summit of the mouth. 

 In some specimens the mandible is much more slender than 

 in that figured, and is pointed to the side or bottom of the 

 mouth, although the normal arrangement is as represented. 



Lepralia striatula, Smitt. Fig. 17. 

 Gemellipora glabra, forma striatula, Floridan Bryozoa, 

 Pt. II., p. 37. Fig. 202. 



Polyzoary encrusting ; cells irregularly shaped, elongated^ 

 usually attenuated downwards or pyriform, arranged more 

 or less in linear series, distinct, very slightly prominent; 

 surface glass}', marked with irregular, mostly transverse, 

 fine striae, and thickly punctate with small white-bordered 



