278 DISCOVERY REPORTS 



Calyx kerguelensis (Hentschel). 



GeUiodes kerguelensis, Hentschel, 1914, p. 127, pi. viii, fig. 11. 



Occurrence. St. 58: Falkland Islands, on piles of Government Jetty, St. 140: South Georgia, 

 122-136 m. 



Remarks. This species, represented in the collection by a piece of a stout, cylindrical 

 sponge, has a skeleton very similar to that of C. arciiarius except that the dermal skeleton 

 is somewhat more diffuse. 



In the present specimen, the sigmata measure, for the most part, up to 0-04 mm. 

 chord, but a few measure up to o-i mm. 



Distribution. Kerguelen. 



Genus Dasychalina, Ridley and Dendy. 



Genotype. D.fragilis, Ridley and Dendy. 



Diagnosis. Haploscleridae with dermal skeleton composed of an irregular multi- 

 spicular reticulation subdivided into primary and secondary meshes ; main skeleton of 

 stout multispicular fibres, or systems of anastomosing fibres, with numerous isolated 

 spicules scattered between ; spongin absent or present in very small quantities. 



Remarks. This genus, estabhshed by Ridley and Dendy (1886, p. 329), was abandoned 

 by them (1887) because of a suspected identity with Pachychalina, Schmidt. The 

 characters of the latter are, however, unknown to us, and because Dosycholino frogilis 

 differs in the structure of its skeleton from other species of "Pachychalina^^ Autt., it is 

 proposed here to revive the use of the name. Dasychalina is intermediate between 

 Adocia and Callyspojigia (= "Pachychalina'", Autt.). 



Dasychalina validissima (Thiele) (Plate L, figs. 3-7; Fig. 12). 



Pachychalina validissima, Thiele, 1905, p. 473, figs. 16, 91 ; Halichondria magellanica, Dendy, 

 1924, p. 325. 



Occurrence. St. 51 : Falkland Islands, 115 m.; St. 53: Falkland Islands, 0-2 m.; St. 140: South 

 Georgia, 122-136 m.; St. WS 73 : Falkland Islands, i2i m.; St. WS76: Falkland Islands, 205- 

 207 m.; St. WS77: Falkland Islands, iio-ii3m.; St. WS 83: Falkland Islands, 137-129 m.; 

 St. WS84: Falkland Islands, 75-74 m.; St. WS 109: Falkland Islands, 145 m.; St. WS 233 : 

 Falkland Islands, 185-175 m.; St. WS 237: Falkland Islands, 150-256 m.; St. WS 243: Falkland 

 Islands, 144-141 m. 



Remarks. The specimens may be massive, as in the holotype, massively branched, 

 with branches cylindrical or flattened, or flabellate (PI. L, figs. 3-7), while the surface 

 may be smooth, tuberculate or spinose. The skeleton varies from that shown in 

 Fig. i2rt to that in Fig. 12 b. In spite of the difference in appearance, these two 

 types of skeleton structure are essentially the same. In the holotype (Fig. 12 a) the 

 skeleton consists of a reticulation of stout multispicular fibres, with numerous isolated 



