t 178 J 



IX. 



THE GENUS CORALLIMOEPHUS. 



IJy T. a. STErHENSON, M.Sc, 

 Deinonsti-atoi- in Zoology, UniveisiLy College of Wales, Aberystwyth. 



(Plates XIX, XX.) 



[C0.M.MUN1CATED liV li. SOLTUEKN, ll.SC] 



Rt-ad May 10. I'ublUhed Auau»T I'J, l'J20. 



The si>eciineii.s wliicli imjvide tlie inatt-riiil for iliis .sliort ijaptr are part 

 of a colleclioii of Actiniaria taken oil' Ireland by the Fisherie.s Urancli of tiie 

 Department of Agricnlture and Teciinical Instruction for Ireland during the 

 yeare 1899-1 9 li! ; and a dcsciiplion of other species in this collection will be 

 found in a recent number of these Proceedings (vol. .\.\.\iv, section U, No. 7, 

 pp. lOG-164). 



The genus Coralliniorphus was founded by Moseley in Trans. Linn. Soc., 

 Second Series, vol. i, Zool., 1879, p. 2!)9, with V. jyrofuiubts described first in- 

 onler, then C. ri/fuiii.s. li. Hertwig wrote a good deal more about the genus 

 in his Report (and later in the Supplementary Report) on the Challenger 

 Actiniae, and it has been mentioned by other authors. 



Corallimorphus, Moseley, 1879. 



Stichodactyline Actiniaria, with weak musculature throughout. Body- 

 wall ectoderm has weak longitudinal musculature. No sphincter. No ciliated 

 streaks to the mesenterial filaments, and no true actinojiliaryngeal grooves. 

 Body-wall and oral disc may be very thick and cartilaginous, and animal 

 may attain fairly large size. Tentacles simple, and all knobbed at the tip, 

 divided into two sorts, marginal and discal. There is never more than one 

 tentacle of each sort arising from one and the same endocoel. The exocoelic 

 tentacles are the smallest of the marginal series, taken on the whole, and the 

 discal tentacles correspond to the endocoels of the inner marginal tentacles. 



