Fig. 
Figs. 
Fig. 
. Rhamphostomella costata, Lorenz. Section showing the oral glands 
. Schizoporella unicornis, Johnst., x85. Free swimming larya from 
. Microporelia spatulifera (Sm.), X 85. 
. Smittia Landsborovii, Johnst., var., x 25. 
. Retepora cellulosa (L.). Operculum, x 85. Off Cape Mary Harma- 
. Do. Mandible, x 85.. 
. Cellepora ventricosa, Lorenz. Operculum, xX 85. 
. Cellepora incrassata,Sm. Operculum, xX 85. From Greenland. 
12. 
MR. A. W. WATERS ON 
. Porella cervicornis, Pallas. Mandible, x 250. Naples. 
. Porella concinna, Busk. Mandible, x 250. Durham. 
. Do. Operculum, x 85. Durham. 
. Porella plana, Hincks. Mandible, x 250. 
. Do. Operculum, x 85. 
. Do. Operculum, x 50. From lat. 77° 55’ N., long. 53° 16’ E. : 
. Porella levis, Flem. Mandible, x 250. Shetland. d 
. Porella from Gulf of St. Lawrence (sent as P. propingua, Sm.). Man- 
dible, x 250. 
. Porella rostrata, Hincks. Mandible, x 250. Port Phillip Heads. 
. Porella Skenei, var. proboscidea, Hincks. Mandible, x 250. Off 
Cape Mary Harmsworth. 
. Do. Do. Operculum, x 85. 
. Porella lorea, Alder. Mandibles, x 250. Shetland. 
. Do. Operculum, x 89. 
. Escharoides Sarsii, Sm. Mandible, x 250. Off Cape Gertrude and 
Cape Flora. 
. Do. Operculum, x 85. Do. 
. Do. Mandible, x 250. Said to be from the Antarctic, lat. 74° 0’ S., 
long. 170° H.; 330 fathoms. 
. Escharoides rosacea, Busk. Mandible, x 250. Loch Tyne. 
25. Do. Operculum, x 85. 
26. Rhamphostomella costata, Lorenz. Operculum, x 85. Off Cape 
Gertrude and Cape Flora. 
. Do. Mandible, x 8&5. 
. Rhamphostomella plicata, Sm. Operculum, xX &5. 
. Do. Mandible, x 85. 
. Rhamphostomella bilaminata, Hincks. Mandible, x 85. Gulf of St. | 
Lawrence. 
PLATE 12. 
terminating near the diaphragm, x 85. From off Cape Mary 
Harmsworth. 
Do. Gland, x 250. Examined with ,';-immersion. 
& 4. Phylactella labiata, Sm. Larva in ovicell, x 85. From lat. 
77° 55’ N., long. 53° 16’ E. July 13th. 
Trieste, for comparison of the size. 
worth. 
Do. Vicarious mandible, x 85. 
