14 Mr. E.. Kivkpatrick on 



loped funnel-shaped peristome. The peristome resembles 

 milk-white porcelain ; the inner surface is marked with lon- 

 gitudinal striee, and the upper border is rolled out and thick- 

 ened. Surface of zooecia punctured in young cells ; in old 

 cells the punctures are obliterated and their place taken by 

 small round knobs, as in L. canthariformisj Busk ; but in 

 many cells the horseshoe shape of orifice and straight lower 

 border are apparent. 



Hah. Growing on pebbles. 



Lepralia Poissonii^ Aud. 



In the specimen from Port Phillip the vibraculoid mandibles 

 cross each other on the front of the zooecia, in some cases 

 even being directed upwards. In Mediterranean and Mauritius 

 specimens these organs are directed downwards parallel to 

 each other. 



Hob. Incrusting Algas. 



Genus IIaswellia, Busk. 

 HasioelUa victoriensis, n. sp. (PI. II. figs. 1, la.) 



Zoarium branching, subdichotomous, branches 1 millim. in 

 diameter. Zooecia irregularly verticillate, in whorls of from 

 eight to twelve ; zooecia ovate, walls thick, obscurely punc- 

 tured ronnd margins ; without special pore ; orifice pyriform, 

 the notch occupying the whole proximal margin ; peristome 

 forming a pointed triangular elevation on each side, deficient 

 in front and behind. No oral avicularia ; scattered over 

 zoarium avicularia with broad, thick, semicircular or spatu- 

 late mandibles. Ooecia depressed, marked in front with 

 semicircular area with radiating ridges and bounded by a 

 ridge. Operculum "1 x -07 millim. 



The species described above is most nearly related to //. 

 auriculata, Busk, but differs in the following particulars : — 

 The branches of H. victoriensis are double the thickness of 

 those of H. auriculata ; there are no oral avicularia and no 

 trace of special pore in H. victoriensis. 



Genus POEELLA, Gray. 



Porella Icevis, var. suhcomj^ressa. 



Poi-ella IcBvis, Hinclis, Brit. Mar. Pol. p. 334, pi. xlvii. figs. 10, 11. 

 Porella Icevis, var. subcompressa, Busk, Chall. Rep. p. 149, pi. xx. fig. 3. 



Geographical distribution of P. Itevis. — Norway, 30-300 

 fath. ; Greenland ; Nova Zembla ; Kara Sea. 



