JOUENAL 



OF THE 



ROYAL MICROSCOPICAL SOCIETY. 



DECEMBER, 1910. 



TRANSACTIONS OF THE SOCIETY. 



XIV. — Hicksonella, a New Qorgonellid Genus. 



By James J. Simpson, M.A., B.Sc. 

 (Carnegie Fellow, University of Aberdeen.) 



(Read October 19, 1910.) 

 Plate XIII. 



In my recently published " Revision of the Juncellid-group of the 

 Gorgonellidie,"* I did n °t include any notice of the unique form 

 described by Professor S. J. Hickson under the name of Juncella 

 spiralis. Its puzzling and divergent character made a separate 

 discussion advisable. t 



In the Revision the Juncellids were divided into three genera, 

 namely, Juncella, Scirpearia, and Nicella, and an examination of 

 the diagnoses given there, along with the following descriptions, 



* Proc. Roy. Irish Acad., No. 7 (1910) pp. 247-386 (19 pis.). 



t I wish to take this opportunity of thanking Professor J. Arthur Thomson for 

 entrusting these forms to me for identification and description, and also the 

 Carnegie Trust for a grant to cover the cost of the illustrations. 



EXPLANATION OP PLATE XIII. 



Fig. 1. — Portion of Hicksonella spiralis, enlarged to show the spiral form and 

 also the distribution and nature of the verrucse. x 3. 



,, 2. — Spicules from the verrucse of ditto : (a) near base, (b) near tip. 



„ 3. — Spicules from the ccenenchyrna of ditto : (a) near base, (&) near tip. 



,, 4. — Two views of the same portion of H. flagcllata sp. n. : (a) polyp-bearing, 

 (b) non-polyp-bearing aspect, x 4. 



„ 5. — Spicules of ditto. 



,, 6. — Two views of the same portion enlarged of H. capensis sp. n. : (a) polyp- 

 bearing, (b) non-polyp-bearing aspect. I x 4. 



,, 7. — Spicules of H. cnpcnsis sp. n. 



Dec, 21st, 1910 2 z 



