2 ART. 9. 1. I JIM A : HEXACTINELLIDA. 



I now propose to give an account of my observations on 

 the above mentioned Euplectellids. The following may be men- 

 tioned at once as consequences to be derived from the results 

 I obtained on the systematic : Gray's genera Corbitella and 

 HeteroUlla should be kept up as distinct ; the former to comprise 

 not only Quoy and Gaimard's speciosa but also Marshall's 

 Eudictyum elegans as well as F. E. Schulze's Tœgeria pulchra, 

 and the latter to stand represented by the single original species 

 corbicula of Bowerbank. 



Corbitella speciosa (Quoy et Gatmard). 

 (Plate, figs. 1-12.) 



Alcyoncellum speciosum. Quoy and Gaimard, '33, p. 302 ; 



PL xxvr, fig. 3. — Milne Edwards, '36, p. 586. — 



FiLHOL, '85, p. 284 ; PL vr, fig. 1. (Not Bowerbank, 



'67, pp. 353-358.— Nor Bowerbank, '69, p. 344 ; PL 



xxiv, figs. 8-11). 

 Alcyonellum speciosum. Owen, '49, p. 205, (not Alcyonellum 



gelatinosum). 

 Euplectella speciosa in part. Gray, '66, p. 487. 

 Alcyoncellum sp. Bowerbank, '67. pp. 358-359 (not pp. 



353-358). 

 Corbitella speciosa. Gray, '67, p. 530; PL xxvitt, fig. 1. — 



Gray, '72, p. 457. — Schulze, '00, p. 156. 

 Habrodictyon speciosum. W. Thomson, '68, p. 131 ; PL iv. 



fig. 2 (not fig. 2 a).— Carter, '73; pp. 361, 367. 

 Habrodictyon speciosum in part. Marshall, '76, p. 129. 

 Habrodiclyum speciosum in part. Schulze, '86, p. 42. — 



Schulze, '87, p. 99. 



