Plate 43. 



All figures engraved from photographs. 

 Fig. 1. Sibogita simulans, sp. nov., type. Apex of bell cavity in side view. The blind 



termination of one of the adradial canals (c.ara) is clearly visible ; (era) radial 



canal ; (go) gonad. X 4. 

 Fig. 2. Sibogita simulans, portion of bell margin. There is one tentacle opposite every 



canal ; (c.ara) adradial canal ; (c.c) circular canal ; (t.ra) radial tentacle. X 6. 

 Fig. 3. Amphinema turrida ; one-half of bell margin showing the two well-developed radial 



tentacles, and a large radial tentacular bulb. There are in addition two or three 



rudimentary tentacular knobs in each quadrant. In this specimen none of the 



latter bear filaments, but occasionally they do so ; (era) radial canal ; (o) 



ocellus, x 12. 

 Fig. 4. Cytaeis vulgaris, manubrium with medusa buds (b) ; (tl) labial tentacle, x about 



20. 

 Fig. 5. Cytaeis vulgaris, lip region ; (tl) labial tentacle. 



Fig. 6. Stomotoca divisa ; manubrium, to show crenulated lips (1) and gonads (go). X 2. 

 Fig. 7. Stomotoca divisa; one-half of bell margin, showing the two large radial tentacles 



(t.ra), and numerous rudimentary tentacular knobs; (era) radial canal. 



X 2.5. 

 Fig. 8. Sarsia coccometra, sp. nov., tentacle, showing nematocyst ridges and terminal 



nematocyst knob ; (o) ocellus; (era) radial canal. 

 Fig. 9. Sarsia coccometra. Manubrium and apex of bell. The interradial ridges labelled 

 (go) are not the gonads, but merely folds of the gastric wall. (See p. 180.) 



