32 Rev. T. Hincks on the 



Queen Charlotte Islands the lateral avicularia have a pointed 

 mandible instead of the normal rounded one. Sraitt haa 

 noticed the same thing in Floridan specimens. 



EXPLANATION OF THE PLATES. 

 Plate III. 



Fig. 1. Lepralia hilahiata, n. sp. 1 a. Zooecium with ovicell. 1 h. Zooe- 



cium with the opercukim thrown back, showing the entrance to 



the tubular passage. 

 Fig. 2. Lepralia ckunculata, n. sp. 2 a. Ocecium. 

 Fig. 3. Mncro)wlla spinosissiina, Hincks, form major ; group of cells, 



showing the tubules in the front wall. 3 a. Primary cell. 3 h. 



Zoojcium, showing the position of the ovicell behind the tubular 



orifice. 

 Fig. 4, Lagenipora spinulosa, n. sp, 



Plate IV. 



Fig. 1. Muo'onella prcelucida, n. sp. 



Fig. 2. MucroneUa prcehnga, u. sp. 



Fig. 3. Smittia sputhulifera, n. sp. 



Fig. 4. Porella marsupinm, 31acGrillivray, form porifera. 



Fig. 5. Porella major, n. sp. 



[Plate IX.] 



Suborder Cyclostom ATA. 



Family Crisiidae. 

 Crisia (part.), Lamouroux. 



Crisia cornuta, Linnaeus. 



Houston-Stewart Channel ; Virago Sound ; common. 

 [Norway, Britain, Brittany, Mediterranean.] 



Crisia ehurnea, Linnseus. 



Virago Sound. 



[North and Arctic Seas, St. Lawrence, Labrador, St. 

 George's Banks, California, Fiji Islands, New Zealand and 

 Australia, Madeira, Mediterranean, Britain.] 



