A REVISION OF TBE GENtJS STEGAXOrORELLA. 29^ 



Fig. 19.— S. lateralis. A (Fig. 1). 



Fig. 20. — S. lateralis, b (Fig. 1). Both occlusor tendons are seen, 

 that on the right side being displaced. 



Fig. 21.— S. simplex, a (Fig. 7), 



Fig. 22.— S. tubulosa. a (Fig. 3). 



Fig. 23.— S. tubulosa. b (Fig. 3). 



Fig. 24.— S. auriculata. a (Fig. 8). 



Fig. 25. — S. neozelanica, typical form. Napier, New Zealand, C. M., 

 24.5.95. 



Fig. 26. — S. neozelanica, var. niagnifica. Foveaux Straits, C. M., 

 24.5.95. 



Fig. 27. — S. lateralis. Back of zooecia (Fig. 1). 



Fig. 28.— S. sulcata. Back. Darros Idaiid, B. M., S2.10.1S, 125. 



Fig. 29. — S. sulcata. Variations of median process (Fig. Ifi). 



Fig. 30. — S. neozelanica, typical form. Part of transverse section of the 

 colony seen from the distal side: i., basal wall: l.r., vertical proximal wall 

 of one of the lateral recesses; tii.p., distal wall of the fla.^k-sliHj)ed cavity of 

 the median process; L, opening of tlie tube into the subopercular cavity of 

 the zooecium. New Zealand, C. M., 21.5.95. 



Fig. 31.— S. magnilabris. Back (Fig. lOj. 



Fig. 32.-S. alveolata. Back (Fig. 12). 



Fig. 33. — S. buskii. Proximal wall of a zooecium, siiowing the insertion 

 of the cryptocyst, and the two fragmented rosette-plates (Fig. 13). 



Fig. 31. — S. buskii. Operculum e (Fig. 13). 



Fig. 35. — S. buskii. Operculum a (Fig. 13). 



Fig. 36. — S. truncata. b. Victoria, C. M., 13. 5. 99. 



FiG. 37.— S. truncata. a (Fig. 36). 



Fig. 38.— S. haddoni. b (Fig. 11). 



Fig. 39.— S. haddoni. a (Fig. 11). 



Fig. 40.— S. alveolata. a (Fig. 12). Both occlusor tendons are seen. 



Fig. 41. — S. alveolata. b, seen obliquely (Fig. 12). 



Fig. 42.— Siphonoporella delicatissima. Busk (p. 232). An entire 

 zooecium, some of the calcareous parts seen through tiie epitlieca. Kiu"- 

 George's Sound, Western Australia, Manchester Museum. 



Fig. 43. — S. delicatissima. Diagrammatic side view (Fig. 42). 



Fig. 44.— Steganoporella magnilabris. B (Fig. 10). 



Fig. 45. — S. magnilabris. A (F'ig. 10). 



Fig. 46. — S. magnilabris. k. Jamaica, C. M., 30.6.99. 



