lOG "TERRA NOVA'^ EXPEDITION. 



others are as truly hispid as Flint's variety of C. pisum. In the Antarctic area 

 specimens are not so highly developed— they are smaller and in several cases 

 attached to large sand-grains instead of to the normal habitat of Zoophytes or 

 MoUusca. At Station 48 the only specimen was very compressed, and without 

 incorporated fragments or spicules. The best Antarctic specimens were from 

 Station 38. 



144. Crithiomna piswn, Goes. 



Grithioiiiiia pisum, Goes, 1896, DOA. p. 24, pi. ii, figs. 1, 2. 



., Heron-AUeii and Earland, 1909, TNS. p. 410, pi. xxxiv, fig.s. 6, a. 

 . ,^ Cushman, 1910, etc., FNP. 1910, p. 55. 



Stations 2, 3, 6, 25, 26, 38, 41, 45, 47, 48, 50, 53, 54, 55. 



Occurs both free and attached. At Station 38, large, and at Station 55 very 

 large. Largest of all, sessile on sponges from Station 25, and from Official 

 Station 294. (No material to hand.) 



145. Crithionina pisum, var. Jdspida, Flint. 



[Technitella melo, Norman, /(fe de Folin, 1895. SRR. p. 13, pi. 0, fig. 3.] 

 Crithiomna pisum, var. hispida, Flint, 1899. RFA. p. 267, pi. vi. fig. 2. 



Heron- Allen and Earland, 1909, TNS. p. 110, pi. xxxiv, fig. 7. 



Cushman, 1910, etc., FNP. 1910, p. 56, fig. 63. 



Stations 2, 6, 46. 



Very fine specimens at Stations 2 and 6 (N.Z.). In the Antarctic area a 

 single specimen. 



146. Crithionina rugosa, Goes. PI. IV, fig. 5 



Crithionina rugosa, Goes, 1896, DOA, p. 24, pi. ii, figs. 3, 4. 



Cushman, 1910, etc., FNP. 1910, p. 53, fig. 59. 



Stations 6, 38, 45, 50, 53, 55. 



Much more abundant in the Antarctic than in the N.Z. area. Often attains 

 considerable size. The colour varies ; at Station 38, very dark, owing to the 

 incorporation of volcanic sand. Both free and sessile at Stations 45 and 55. Hispid 

 varieties isomorphoiis with Flint's C. pisum, var. hispida, are generally distributed, 

 we figure one from Station 38. Others were found at Station 55. The sessile 

 specimens, especially of the hispid form, can hardly be separated from C. mamilla: 

 Gol'S, in his description of the species, refers to the fact that C. rugosa appears to 

 be closely allied to C. mamilla, and it appears to us to be doubtful whether there 

 is any valid reason for the separation of the forms. The main distinctions appear 

 to be the smaller size and generally sessile habit of C. mamilla. 



C. rotundata, Cushman (C, 1910, etc., FNP. 1910, p, 56, figs 64, 65), appears, 

 to be nothing more than G. rugosa attaining super-normal dimensions and having 

 a labyrinthic interior, thus connecting C. rugosa with C. lens. 



