Observations on British Zoophytes. 



91 



IV. Observations on British Zoophytes. By T. Strethill Wright, M.D. 



Kionistes retiformis (xiwv-i<fr7){ii). 



I'olypary retiform — alimentary polyps minute, white, with single row of short 

 tentacles — reproductive polyps columnar, thickened towards apex, with- 

 out tentacles, bearing many generative capsules. 



A male specimen of this zoophyte was found growing in an 

 old shell at Granton in May 1857. The corallum consists of 

 a close network of flattened chi- 

 tonous tubes, from out of which 

 the alimentary and reproductive 

 polyps spring at intervals. The 

 sperm - sacs (one of which is 

 shown in the marginal woodcut) 

 attached to the reproductive polyp 

 differ from those of Hydractinia, 

 in having the endoderm attached 

 to the ectoderm at their distal ex- 



tremitieS, as I have figured in the Reproductive polyp of K. reteformis 

 (, ^ , , . mi . with single sperm-sac ; a, endo- 



sperm-sac of Eudendnum. This derm , 6, ectoderm, c, cavity con- 

 zoophyte approaches the Sertu- taining spermatozoa. 



lariadaB in the simple columnar form of its untentacled re- 

 productive polyps, and forms the connecting link between the 

 Tubulariadae and Sertulariadse. Thus we have : — 



Sperm or egg sacs attached to ordinary alimentary ) ~, ~ 



polyps, as in . . . . . / j Clava, Coryne, &c. 



Sperm or egg sacs attached to reproductive ali- ) -r, i n . , 



mentary polyps, which differ from ordinary ali- [ ^f^rlT fUC1C ° la 

 mentary polyps in having fewer tentacles, as in \ * 



Sperm or egg sacs attached to reproductive polyps, ) „ , . . 

 with rudimentary mouth and tentacles, as in j ^ ra ° mia " 



Sperm or egg sacs attached to reproductive polyps ) ir . . Q , . 

 without mouth or tentacles, as in . . } *- 10nistes > kertulana. 



V. (1.) On the Vomer in Man and the Mammalia, and on the Sphenoi- 

 dal Spongy Bones. By John Cleland, M.D., Demonstrator of 

 Anatomy in the University of Edinburgh. 



The remarks which I am about to make will be confined as 

 much as possible to matters of observation. I shall resist the 

 temptation to enter on the question of the constitution of the 



