POLYZOA. 103 



84. C. elegans, sp. nov. Cells arranged quincuncially, minutely 

 granular, the septum between two cells prolonged upwards into a 

 narrow rib running up the centre of the tube in the row above. White. 



FAMILY TUBULIPORID^;. 

 Polyzoarium depressed, or massive, adnate, orbiculated, or lobed. 



TUBULIPORA. 



Polyzoarium adnate or decumbent ; entire or divided into lobes 

 or branches ; cells partially free and ascending, radiating from an 

 eccentric point. 



85. T. glomerata, sp. nov. Encrusting, irregular, wart-shaped, 

 thick ; tubes crowded, irregularly placed. 



ALECTO. 



Polyzoarium adnate, creeping, irregularly branched ; cells in single 

 series or disposed in more or less irregular transverse rows. 



86. A. racemosa, sp. nov. Large, branched ; cells in clusters 

 of from two to ten together, irregularly placed. 



87. A. disposita, sp. nov. Slightly branched, irregular; cells 

 prominent, arranged in parallel rows ; margin defined. 



FAMILY D IASTOPOELD^: . 

 Polyzoarium discoid or indefinite, adnate, sessile, or pedunculate. 



TENNYSONIA. 



Polyzoarium arising from a rather thick central base, lobate, stelli- 

 form ; lobes curved, with a median angle ; tubes wholly immersed, 

 except the mouths, which are disposed in straight lines extending from 

 the median angle to the denticulate margin of the lobes ; interspaces 

 cancellous. 



South Africa. 



88. T. Stellata, Busk. Fronds much curled ; tubes with thin 

 mouths, slender, erect, rather closer towards the margin, but ceasing 

 altogether before reaching it. 



Cape of Good Hope. 



PATTNELLA. 



Disc concave or depressed in the centre ; tubes ascending towards 

 the margin ; mouth simple, circular ; surface not perforated. 



* 89. P. veiTUCaria, Milne -Edwards ; Tubulipora patellata, 

 Gray, Dieff. N.Z., ii., p. 295. Cells crowded towards the circumfer- 

 ence ; margin scored ; central cells shorter, often oblique. 



New Zealand (Dr. Sinclair). 



DISCOPORELLA. 



Polyzoarium sessile or aduate ; discoid, centre usually elevated or 

 Bub-conical, rarely depressed ; tubes horizontal, usually disposed in 



