126 



Proceedings of the Royal Irish Academy. 



Genus Nicella. 



This genus is entirely restricted to the Pacific Ocean. 



Let us now illustrate " associations of species " in different localities. 



(a) Laccadives, 



(h) Maldives, . 

 (c) Ceylon, 



{d) Andamans, 



(e) Mergui, 

 (/) N.-E. Australia, . 

 ((/) Bourbon-Mauritius, 

 Qi) Cape of Good Hope, 



S. aurantiaca, S. quadnlineata, and 



N. reticulata. 

 J. juncea, S. furcata. 

 J. gemmacea, J. trilineata, S. aurantiaca, 



S. ceylon^nsis, S. furcata. 

 J. juncea, J. racemosa. S. hicksoni, 



S. verrucosa, S. anomala, S. anda- 



manensis, S. rarnosa. 

 J. juncea, J. gemmacea, S. furcata. 

 J. juncea, J. gemmacea. 

 J. juncea, J. gemmcuxa, N. dichotoma. 

 S. flagellum, S. furcata. 



Beferervces to various large Collections of Juncellids. 



" Challenger " Collection. 



This collection was made by H.M.S. " Challenger," during her cruise 

 round the world, 1873-76. The specimens are deposited in the British 

 Museum, and were described by Wright and Studer in the Zoological Report 

 of the " Challenger" Collections, vol. xxxL, pp. 153-181. 



Juncella juncea, 

 Juncella juncea, 

 Juncella gemnuicea, . 

 Juncella gemmacea, . 

 Juncella racemosa, 

 Scirpeai-ia maculata, 

 Scirpearia profmda, 

 Sdrpearia profunda, 

 Scirpearia pi'ofunda, 

 Nicella moniliforme, 



DESCEIBED AS 



Juncella juncea, var. alha, p. 168. 

 Junt,ella harbadensis, p. 159. 

 Juncella gemmacea, p. 158. 

 Ellisella nuiculata (pars), p. 160. 

 Juruxlla racemosa, p. 159. 

 Ellisella maculata (pars), p. 160. 

 Seirpearella profunda, p. 155. 

 Scirpearella gracilis, p. 156. 

 Seirpearella rubra, p. 157. 

 Sciipearella monilifwme, p. 156. 



