EEPORT ON THE POLYZOA. 



Var. a. gracilis (PL I. fig. 4). 



Character. — Closely resembles Crista denticulata but of far slenderer habit, rarely 

 if ever presenting any longitudinal interspaces between the series of zocEcia ; branches 

 not more than 0'2 mm. wide ; zocecia about 0"06 in diameter. 



Habitat. — Off Zebu, Philippine Islands. 



Var. /3. patagonica, d'Orbigny (?) 



Crisia patagonica, d'Orb., Voy. dans I'Am. M6r. Polyp., p. 7, pi. I figs. 1-3. 



" Cells from nine to nineteen, straight, very distinct ; branches arising from second 

 or third cell ; sometimes two from an internode, when the second arises from the sixth 

 cell. Joints black." Diameter of branches about 0-23 mm., and of zocecia 0"08 mm. 



Habitat. — Station 36, oflF Bermudas, 30 fathoms, coral. 



[Patagonia.] 



(4) Crisia elongata, M.-Edw. (PI. I. fig. 3). 



Crisia elongata (1), M. -Edwards, Eech. sur les Crisies, p. 10, pi. vii fig. 2 ; Busk, Brit. Mus. Cat., 

 pt. iii. p. 3, pi. iv. figs. 5-6 ; Waters. 



Character. — Zoarium composed of long straight branches. Zocecia, twelve to 

 twenty-one or more in each internode ; often much produced and curved forwards. 

 Aperture circular, even ; branches arising from the fifth to the seventh zocecium. 

 Ooecial cells unknown. Surface finely granular. Branches 0*3 mm., zocecia 0"07 mm. 

 wide. 



Habitat.~8ta,tioR 176, lat. 18° 30' S., long. 173° 52' E., 1450 fathoms, Globi- 

 gerina ooze. 



[Red Sea or Mediterranean? M.-Edw.; Algoa Bay.] 



Whether the specimen (the only one in the Challenger collection) here described and 

 figured really be the form described by M. Milne-Edwards I am by no means now con- 

 vinced, but it is the same as that to which I have given the same appellation in the 

 British Museum Catalogue. One reason for the doubt is that M. Milne-Edwards 

 describes his Crisia elongata as narrower than Cnsia denticulata, while that I have to 

 name is certainly quite as wide, if not wider, than the usual form of Crisia denticulata. 



(5) Crisia acuminata, n. sp. (PI. III. fig. 1). 



Character. — Zoarium 1 to 2 inches high, composed of long, straggling, tlcxuose 

 branches dividing once or twice dichotomously and terminating in two short bifurcations. 

 One of the terminal zocecia (usually the penultimate), is often produced into a long, 



