CllISIA. EBURNEA. 



" SERTOLARIO D'AVORIO," Cawlini, Mem. d. Pol. mar. 240, pi. ix. figs. 5, 6. 



CKLLI-LARIA EBURNEA, Pallas, Elench. 75. 



CELLARIA EBURNEA, Ellis $ Sol. Zooph. 24 : Lamk. An. e. Vert. ed. 2, ii. 

 184. 



CIUSJA EBI-RNEA, Zawi*. Pol. corall. flex. 138: Flem. B. A. 540: Johntt. 

 Br. Zooph. ed. 2, 283, wooodcut, fig. 62, pi. 1. figs. 3, 4 : 

 Reid, Ann. N. H. xvi. (1845), 385 : Van Sen. Eecherches, 

 Mem. Brux. xviii. 28, pi. iii. figs. 12-16 : Milne-Edwards, 

 Ann. So. Nat. ii. Zool. 198, pL vi. figs. 2, 2 a ( = var. aculeata): 

 Smitf, (EfV. K. Vet.-Ak. Forb. 1864, 117 & 132, pi. xvi. 

 figs. 7-19 ; var. cornuta ( = C. aculeata, Haas.), loc. cit 1 17 <t 

 133: &C.&C. 



CKISIA ACDLEATA, Hassall, Ann. N. H. vi. (1841), 170, pi. vii. figs. 3,4: 

 Johnst. B. Z. ed. 2, 285. 



? CIIISIA PRODUCTA, Smitf, loc. cit. 116 <fe 131, pi. xvi. figs. 4, 5, 6. 



CRISIA HAUERI, Rettss (fide Manzoni), Foss. Polyp, d. Wiener Tertiiirbeok. 

 54, pi. vii. figs. 22-24 ; Fauna deutsch. Oberoligocans, ii. 

 54, pL xv. figs. 6-8. 



Zoariwn forming small bushy tufts, of ivory whiteness, 

 much branched, branches usually originating from the 

 lowest cell in the internode, occasionally higher up, 

 curled inwards. Zoascia alternate, minutely speckled, 

 more or less curved, almost entirely adnate, with a cir- 

 cular orifice very slightly bent forwards, frequently a 

 pointed projection on the outer side; 3-9 cells in an 

 internode; joints horn-coloured or (sometimes) black. 

 Ooecia pyriform, adnate, thickly punctate, irregularly 

 distributed, with a projecting tubular orifice in the 

 adult state. 



Height from to 1 inch. 



Var. a (acuteata, Hassall). With a long, slender spine on 

 the outer side of the zooecia, near the top. 



Var. /9 (producta, Smitt). Zooecia more or less straight, 

 elongated, the orifice directed upwards. 



HABITAT. On Algae and zoophytes (chiefly), stones, &c., 

 from tide-marks to deep water (170 fathoms in Shetland). 

 LOCALITIES. Generally distributed on our coasts. Var. a 

 (aculeata). Kingstown Harbour; Brighton (Hassall): 

 Antrim, 47 fathoms (Swanston) : Ayrshire (W. T.) : Shet- 



