JouM. R. Mick. Soc, 1910, pp. 681-1)2. f 29j 



XIV. — Hicksonella, a New Gorgmiellid Genus. 



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

 (Carnegie Fellow, University of Aberdeen). 



(Read October 19, 1910.) 

 Plate XIII. 



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

 Gorgonellida-,"* I did not include any notice of tlic unique form 

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

 spiralis. Its puzzling and divergent character made a separate 

 discussion advisable.f 



In the Eevision the Juncellids were divided into three genera, 

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

 the diagnoses given there, along with the following descriptions, 



• Proo. Roy. Irieh Acad., No. 7 (1910) pp. 247-386 (19 pis.). 



t I wish to tako this opportuuity of thanking Professor J. Arthur Thomson for 

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

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



EXPLANATION OF PLATE XIII. 



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

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



„ 2. — Spicules from tho verruca' of ditto : (n) near base, [b) near tip. 



,, 3. — Spicules from tho ccunenchyma of ditto : (n) near base, (6) near tip. 



,, 4. — Two views of the same portion of ll.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 U. capcnsis sp. u. : (a) polyp- 

 bearing, (6) non-polyp-beariug aspect. X 4. 



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



