382 Rev. T. Hincks's Contributions towards 



inferior margin an avicularium, placed transversely, with 

 pointed mandible directed obliquely upwards ; in some cells 

 this avicularium is absent and is replaced by a very large 

 avicularium placed at one side of the orifice, the beak much 

 elongated and somewhat falciform, the mandible expanded at 

 the base and tapering off to a point above, directed upwards. 

 Ocecia (?) . Frequently a pointed avicularium on the lower 

 part of the cell. 



Loc. Indian Ocean (Miss Jelly). 



Flustra coronata, Audouin, Lepralia marsupiata, Busk, 

 Porellina stellata, Verrill, as well as the present form, may 

 be added to the list already given of species referable to this 

 genus. 



Family Myriozoidae (part), Smitt. 



Schizopoeella, Hincks. 



? Schizoporella sanguinea, Norman, var. 

 (PL XVII. fig. 3.) 



Zooecia flattish, quadrangular, in linear series, separated by 

 raised lines ; surface punctured and roughened by ridges and 

 nodules ; orifice depressed, much broader than high, arched 

 above, lower margin straight, with a central sinus, and on 

 each side a small notch. In a line below the inferior margin 

 three small circular avicularia — one central, and one on each 

 side between the orifice and the side wall. Ocecia (?). 



Loc. Red Sea or Mediterranean (R. S. Newall) . 



The only character by which this form can be distinguished 

 from S. sanguinea, Norman, is the triplet of circular avicu- 

 laria below the orifice. They appear to be generally present, 

 and always occupy, so far as I have seen, the same positions. 

 Taking into account, however, the inconstant character of the 

 avicularian appendages in this group, it seems better to rank 

 the present form as a variety. 



Family Escharidse (part), Smitt. 

 Poeella, Gray. 



Porella rostrata, n. sp. (PL XVII. fig. 5.) 



Zooecta enlarged above, narrowing off towards the base, 

 rounded at the top, bounded by a slightly raised line ; sur- 

 face smooth and shining, bearing several bosses or umbos of 

 various size ; front w T all rather abruptly raised towards the 

 inferior margin, below depressed ; orifice (primary) arched 

 above, slightly narrowed towards the lower margin, which is 

 straight ; peristome (in the adult) raised, forming a secondary 



