dredged up from the Gulf of Manaar. 447 



tliem, which I will now describe under the generic names 

 Holocladina and Cysteodictyina respectively, having already 

 above defined the general characters of the group under the 

 term Testamoebiformia. 



Holocladina pustulifera^ n. sp. 

 (PI. XVIII. fig. 4, a-g.) 



Test radiciform, polychotomous, free towards the centre, 

 fixed by the terminations of the rootlets at the circumference. 

 Consistence hard. Composition calcareous. Colour white 

 (PI. XVIII. fig. 4). Surface even, pustuliferous, pustuliform 

 eminences of different sizes scattered over the surface irregu- 

 larly (fig. 4, e), plentifully about the centre, sparsely on the 

 branchlets, in the form of smooth, hemispherical projections, 

 varying in diameter under l-600th inch, terminating in a 

 slight papillary eminence with a punctum in the centre 

 (fig. 4, b, c), sometimes extended into a short conical spine 

 (fig. 4, d) j ends of the rootlets subpalmate, terminating in 

 amorphous granular projections (fig. 4, h), alternating with 

 conical processes, which appear to be perforated at the extre- 

 mity respectively ; and if so, here would be the oral apertures 

 (fig. 4,gg). Surface of the test between the pustuliform 

 eminences bearing the appearance of being so minutely micro- 

 punctate as to be hardly distinguishable under a high power. 

 Internally, structure of the test- wall, which varies in thickness 

 under l-50th inch, composed of extremely minute tubules in 

 juxtaposition, perpendicularly descending from the surface to 

 the interior (fig. 4,/) , which in its dried state is now hollow 

 and without foreign material, but still presenting the remains 

 of the sarcode in the form of a thin yellow layer adherent to 

 the inner surface of the test. Size of most perfect specimen 

 about a quarter of an inch in its longest diameter. 



Hob. Marine, in the crevices of Melobesian nodules. 



Loc. Gulf of Manaar. 



Obs. It is evident from the form of this test that the living 

 animal possessed an amoeboid form ; but whether both were 

 developed successively (that is, one part after another like the 

 crust on a stream of lava), or the living animal was fully 

 developed before the test was secreted, there is no evidence 

 now to show, beyond the presumption that the former was 

 most likely the case. The absence of all foreign material in 

 the interior, together with its form, distinctly separates it from 

 the genera Carpenteria and Polytrema, while it chiefly differs 

 from Aphrosina (Journ. Hoy. Microscop. Soc. 1879, vol. ii. 

 ]). 500, pi. xvii. figs. 5-10) in not being multilocular. No 

 oral apertures were satisfactorily seen ; but it may fairly be 



