£.70 Mr. W. S. M. D' Urban on the 



and out with spicules ; spicules comparatively long, slightly 

 curved, slightly clavate, more or less covered irregularly with 

 small tubercles, l-100th by l-750fch inch in their greatest 

 dimensions. 



Hab. Marine, growing on the stems of Tubularia and 

 attached to shells, 62 to 160 fms., Barents Sea. 



Obs. This differs from Ammothea Luetkent, Marenzeller 

 (Coelent., Echinod. u. Wiirmer der k.-k. osterreichisch-unga- 

 rischen Nordpol-Exp. p. 16, Taf. iii. fig. 1 : Wien, 1877, 

 4to), in the more or less agglomerated condition of the 

 polyps, which in A. Luetkent are separate like bunches of 

 grapes. The latter has been found on the west coast of 

 Greenland, and by Capt. Feilden in Smith Sound. With 

 reference to the disputed point about the " retractile " nature 

 of the polyps in Ammothea, there can be no doubt that they 

 are verruciform and composed of tubular tentacles coated all 

 over, both inside (that is, towards the internal cavity of the 

 polyps) and outside, with spicules, as above stated ; while in 

 Lobularia they are attached to a retractile tube within the 

 radiated aperture of the surface. Hence, as stated by Kolli- 

 ker (apud Marenzeller), they are not retractile. In Ammothea 

 the only tentacles are those seen on the outside of the cell, 

 which is not imbedded in the matrix. 



Marenzeller mentions the following Actinozoa as having 

 been met with by the Austro-Hungarian expedition : — 

 Ammothea Luetkent, Mar. ; Gersemia Jlorida, llathke, and 

 O. loricata, Mar.; Umbellula encrinus, L. ; Paragoria arborea, 

 L. ; Urticina felina, L. ; Phellia, sp. ?; and Zoanthus arcticus, 

 M. Sars. 



Dr. van Lidth de Jeude mentions a species of Actinia as 

 having been found in three dredgings. On one occasion two 

 specimens were obtained attached to a large whelk(?)-shell. 

 One or two corals brought home by Mr. Grant have not yet 

 been determined. 



ECHINODERMATA. 



Crossaster papposus (Linck), var. affinis (Brandt). 



The only specimen brought me by Mr. Grant had but eight 

 rays. 



Ophiopleura arctica, Duncan, in Ann. & Mag. Nat. Hist. 

 August and September 1878. 



Only two specimens of this rare Ophiurid were brought me 

 by Mr. Grant. 



