EXPLANATION OF PLATE XLVIII. (continued). 

 FIG. 



24. ACINETA GRANDIS, S. K., vol. ii. p. 831. Adult zooid, x 100 ; affixed near the 

 base of this species, see letter a, is delineated an ordinary example of Acineta 

 lemnarum found associated with it, under a similar magnification, for the 

 purpose of indicating the relative proportions of these two forms. 



25-28. ACINETA TUBEROSA, Ehr., vol. ii. p. 829. 25, Long-stalked variety, x 400; 



26, example as seen in horizontal optical section showing the four points of 

 attachment of the body to the lorica and the bases of the tentacular fascicles ; 



27, a similar body as seen in vertical section ; 28, horizontal optical section 

 immediately above the junction of the pedicle with the lorica (Fraipont). 



29. ACINETA SAIFUL^E, Meresch., vol. ii. p. 836. Spirit-preserved example, x 200 

 ( M er es chko wsky ). 



30, 31. HEMIOPHRYA BENEDENI, Fraipont, vol. ii. p. 824. 30, Zooid, x 70; 31, portion 

 of pedicle, x 300, showing quadrangular contour and transversely striated 

 central core. 



32, 33. ACINETA CRENATA, Fraipont, vol. ii. p. 837. Zooid with elongate lorica, x 600 ; 

 33, shorter lorica, with distal region onlyof the pedicle (Fraipont). 



34, 35. ACINETA JOLYI, Maupas, vol. ii. p. 835. 34, Front and, 35, lateral view, x 200 

 (Maupas). 



36, 37. OPHRYODENDRON BELGICUM, Fraipont, vol. ii. p. 853. 36, Vermiform and, 37, 

 proboscidiform zooids, x 400 (Fraipont). 



38-46. OPHRYODENDRON SERTULARI^;, Str. Wright sp., vol. ii. p. 851. 38, Ordinary 

 proboscidiform zooid in lateral view, bearing at v a single vermiform germ, 

 x 200; 39, proboscidiform zooid from above, showing, after treatment by the 

 author with osmic acid, orbicular contour of body and enclosed branching 

 endoplast ; 40, detached vermiform zooid more highly magnified, showing 

 acetabular character of the basal region. 



42. ACINETA VORTICELLOIDES, Fraipont, vol. ii. p. 837. Distal region showing 

 rudimentary development of the lorica, x 300 (Fraipont). 



43-45. AciNETOPSlS RARA, Robin, vol. ii. p. 855. 43, zooid with extended tentacle, 

 X 200 ; 44 and 45, tentacle in various states of contraction more highly mag- 

 nified and showing externally developed spiral fibrilla (Robin). 



46. HEMIOPHRYA TRUNCATA, Fraip., vol. ii. p. 825. Adult zooid, x 250 (Fraipont). 



