Chatham Island and d^ Urvillc L->l<ind. ID 



tlic oral ghuuls may appear very dilTcrcnt in various s])ecirs 

 and under various cvniditions. It is as yet not always 

 possible to deeide what dillerenees are of specific value. 



\\\. L. clivusa the avicularian j^lauds are filled with a 

 honio<^eneous mass. 



Boti) this and L. maryarlt'ifera, Q. & ()., will ultimately 

 have to be removed from Lviiralia, 



Hub. Chatham Island, Jan. l«'jr. 



lUppothoa hijuUna (L.). 



This cosmopolitan species occurs from Maunganni, 

 Chatham Island. The shell is calcareous, and there are 

 VZ tentacles. 



Sinitiiu iiiuiiiiijaiinitnsis, sp. n. (I'l. I. figs. 8—10.) 



Zoarium unilaminatc or adnate. One piece forms a cup 

 Indf an inch across, with the zocceia opening on the inside of 

 the cup. The zooccia are indistinct, fairly fiat, with large 

 pits over the whole surface, and in the younger zooccia there 

 is below tiie oral aperture a large semicirenlar avicidarium 

 on a raised prominence granulated immediately below the 

 avicularian chamber ; in older specimens the avicularium is 

 within the oral aperture. The lyrula occurring deep down 

 in the aperture is not readily seen and might ca^ily be over- 

 looked. The ovicell is much raised, elongate, with large 

 pores on the front, but only in the central ])art, and in the 

 older ovicclls there is an area formed by a thickening of the 

 sides. 



This is somewhat like Pore//a/on/iOsa*, MaeG., but difi'ers 

 in having the zooccial ])its over the whole surface, and 

 MacGillivray says there is no internal denticle. 



S. luunnyunulensk also occurs foliaceous from Wanganui, 

 New Zealand, being in two layers in my specimen ; but the 

 two layers are only adherent in places, so that it should 

 perhaps be called Hemescharan growtli. There are two 

 distal rosette-plates in the angle near the basal wall and 

 al)out 17 tentacles. 



Hub. Maunganui, Chatham Island, and Wanganui, New 

 Zealand. 



• " New or Littlo-known Polvzoa : pt. .\i.,' 'J'raiis. Hoy. Sof. Vict. 

 Aul. .\.\ii. 1-. .% I'l. ii. fig. (188();." 



