456 Mr. H. J. Carter on 



gave a description of this sponge under the idea that it was 

 a parasitic growth of an Esperia over tlie sand-iibre of a dead 

 Psammonematous sponge ; but having received another speci- 

 men of the same kind from Mr. Wilson, which shows that 

 this could not have been the case, for skeletal spicules of the 

 Esjjeria are mixed with the quartz-grains of the Psammone- 

 matous fibre, I saw that the name which I had given to it was 

 not only altogether inappropriate, but misleading, in short 

 that it was an Esperia which had built up the wliole structure ; 

 hence I propose to change the name of '"''Esperia parasitica " 

 to ^'' Pseudoesperia enigmatical'' following the course which I 

 have laid down for the location of such compound sponges, 

 explained in the ^Annals' of 1885 (vol. xv. pp. 319-321). 

 Thus it might be placed in the order Holorhaphidota at 

 the end of the group to which it more particularly belongs, 

 viz. the " Esperina." It is a very remarkable combination, 

 but not more so than the covering of a Psammonematous 

 structure with LufFarid fibre, as described above under the 

 name oi Pseudoceratina typica (p. 287), or that in the species 

 just mentioned, viz. Psendohalichondria clavilobata^ which 

 is accompanied by a Holorhaphidotic spiculo-fibre. 



Suherites spinispirulifera^ Cart. 



Suherites spintspiruh'fera, ' Annals,' 1879, vol. iii. p. 345, pi. xxviil. 

 tigs, and ~ 



Specimen consisting of a thick crust about ^ in. high and 

 4 in. square. Colour yellowish. Surface pitted, pits sur- 

 rounded by ridges, altogether forming a subreticulated pattern. 

 Pores not seen. Vents here and there in the pits. Spicules 

 of two kinds, viz. skeletal and flesh-spicules : — 1, skeletal 

 spicule, subpin-like ; 2, flesh-spicule, consisting of a spinife- 

 rous shaft, spirally twisted for about one turn and a half. 



Log. Port Western. 



Obs. This is a varietal form of that from Port Elizabeth 

 (Cape Colony), the type specimen of which, described and 

 illustrated in 1879 (/. c), is in the British Museum, bearing 

 my running nos. 13 h and 15 k, registered 71. 5. 12. 1. 



Suherites {Hymeniacidon) carnosus, Bk. 



Suherites {Hymeniacidon) carnosus, Bk., Mon. B. S. toI. iii. pi. xxxiv. 

 figs. 5-9. 



Specimen fig-shaped, with globular head and contracted 

 narrow stem. Head 1 in. in diameter. Growing on the 

 valve of a Pecten. 



Log. Port Western. 



