250 Rev. T. Hincks's Contributions towards a 



narrow and slit-like, with a slight border surrounding it. 

 The surface of the cells is strongly areolated, the areolations 

 radiating from the base towards a prominent ridge, which 

 crosses the cell just below the pore, and partially shuts it in. 

 There is an avicularium on one side or on both, a little below 

 the orifice, with produced pointed mandible directed almost 

 straight outwards. 



There is a remarkable change in the shape of the pore in 

 this variety. In the normal state it is placed transversely, 

 and is elliptical in form, sometimes slightly flattened on one 

 side, and altogether of larger size (PI. VIII. fig. 3 a) * ; here 

 it is a mere slit and directed vertically. There are differ- 

 ences, too, in the size and position of the avicularia, which in 

 the variety are of very considerable length, placed high up on 

 the cell, and directed outwards. In the more usual form they 

 are smaller, some way below the orifice, and directed obliquely 

 downwards. The sculpture in the present variety is also 

 very striking. 



Family Myriozoidae. 



SCHIZOPORELLA, Hincks. 



ScMzoporella biserialis, n. sp. (PI. VII. fig. 3.) 



? ScMzoporella arachnoides, MacGillivray, ' New or Little-known Poly- 

 zoa,' part iii. p. 2, tig. 4. 



Zocecia ovate (irregular in form), ventricose, deeply 

 sutured, whitish, surface thickly covered with small punc- 

 tures ; orifice arched above, straight below, with a central 

 sinus of moderate size, rounded below and not contracted at 

 the opening ; peristome not raised, bearing 14-16 tall erect 

 spines, set closely together 5 on each side (almost in a line 

 with the lower margin) frequently a single detached spine at 

 a short distance from the orifice ; round the base of the ceil 

 at its upper extremity, and not extending below the orifice, a 

 second series of spines (about ten), tall, slender, and recum- 

 bent. Avicularia none. Ocecium subglobular, surface 

 smooth and dense, three spines on each side in front of it. 



Loc. Napier, New Zealand {Miss Jelly). 



ScMzoporella cribn'llifera, n. sp. (PI. VIII. fig. 5.) 



Zocecia small, short-ovate, very irregularly disposed (turned 

 in all directions) , decidedly convex, distinct, surface roughened 

 and furrowed, often strongly areolated, the areolations radi- 



* This figure is taken from a cell which (in common with the whole 

 colony to which it belonged) was very slightly calcified. 



