366 Mr. H. J. Carter on 8])ecimens 



poljthalaraous interior of the podal part, which is the test in 

 the latter, generically the same. Otherwise of what calcareous 

 foraminiferal test is the arenaceous Squamulina scopula the 

 representative ? 



SPONGIDA. 



Caenosa. 

 Halisarca ruhitingens^ n. sp. (provisional). 



Amorphous, indefinitely spreading and agglomerating to- 

 gether every thing in its course, at the same time that the 

 whole is tinged externally by its red colour, appearing in the 

 form of a thin membrane when stretched across cavities, com- 

 posed of polygonal divisions (cells) in juxtaposition, filled 

 with granular contents in which the pigment is situated. 

 Divisions varying in size under 5-6000ths inch in diameter. 



Hah. Marine. 



Loc. Gulf of Manaar. 



Ohs. At first Halisarca riibitingens appears like a Hilden- 

 hrantm; but the absence of distinct cellular structure, no 

 conceptacles, and its greater thinness are opposed to this view; at 

 the same time these characters do not satisfy me as to its being 

 a species of Halisarca ; hence I have named it " provisionally" 

 (that is, until it has received examination in the living state). 



PSAMMONEMATA. 

 Hircinia claihrata^ u. sp. 



Skeleton kerataceous, massive, sessile, lobate ; lobate por- 

 tions passing into thick digital processes, subbranched, hollow, 

 clathrate. Texture stiff, resilient. Colour light brownish 

 yellow. Surface irregularly clathrous, covered with minute 

 points (conuli) . Structure uniformly reticulate, chiefly com- 

 posed of simple, solid, translucent, amber-coloured fibre, here 

 and there charged with foreign bodies (quartz-grains and 

 sponge-spicules) , especially towards the surface, where the 

 ''points" are all areniferous; forming an irregularly fissured, 

 clathrous, thin wall, varying under a quarter of an inch in 

 thickness, which presents itself under the general form men- 

 tioned. Size varying from 6 to 12 inches in height and breadth. 



Hah. Marine. 



Loc. Gulf of Manaar ; Red Sea. 



Ohs. I have never seen to my knowledge any thing but 

 specimens of the skeleton of this sponge, which, being very 

 tough and durable, have in all probability been picked off the 

 beach ; at the same time, if they had been taken alive and 



