42 Mr. II. J. Carter on 



in. in greatest diameter, that is in the middle; cloacal 

 cavity 3-24ths in. in diameter in the middle. 



Ohs. At first sight this looks very much like Sycandra 

 Ramsayi from its hairiness ; but when examined minutely it 

 is found to present the structure above stated, which allies it 

 almost as much to the Leucones as to the Sycones, hence the 

 wall-structure is a mixture of both. The sarcode of the 

 chambers is plentifully beset with ova, which appear to be in 

 the last stage of segmentation. 



17. Hypograntia sacca^ von Lendenfeld, sp. 



Gmntessa sacca, v. Lend. oj). et loc. cit. p. 1098, pi. Ix. fig. 41, aud 

 pi. Ixiii. fig. 42. 



Individualized. Specimen large, pyriform, compressed to 

 flatness, sacciform, somewhat bent upon itself, free and open 

 at the small end, which is truncate and bears the remains of 

 a peristome that has been broken off, so that, at first sight, it 

 appears to be naked or without one ; convex at the large end, 

 where the point of attachment was by the most prominent 

 part. Colour sponge-brown. Surface consisting of cribri- 

 form sarcode densely charged with small radiates, through 

 which project a number of glistening cones consisting of long 

 acerates ; pores of the cribriform structure large, averaging 

 about l-207th in. in diameter, or just half the size of the holes 

 in the cloaca ; cones irregular in form, of different sizes, and 

 at various distances apart, averaging about l-4l5th in. in 

 diameter at the base, and 1 -207th in. from each other ; but 

 all broken off in the specimen, so that their length cannot be 

 ascertained. Pores in the cribriform structure as just stated. 

 Vent single, terminal, amounting in the compressed state of 

 the specimen to a mere slit about 5-12ths in. long; furnished 

 with a peristome, which has been broken off close to the lip ; 

 leading into a large cloacal cavity, which, on account of its 

 compressed form, measures H in. in its greatest diameter; 

 thickly scattered over with subcircular holes averaging l-60th 

 in. in diameter, or twice that of the " pores," as before 

 stated, arranged for the most part in groups of three and 

 four together, at variable distances apart, depending on the 

 breadth of the intervening skeletal structure of the cavity ; 

 presenting xoitliin their borders one or more openings of the 

 wall-structure; scantily echinated with short spines, that is 

 the fourth arm of quadriradiates. Structure of the wall, which 

 when compared with the diameter of the cloaca is very thin, 

 not being more than l-16th in., much the same as in Grantia 

 hirsuta. Ends of the chambers of the wall-structure exter- 

 nally covered by the cribriform sarcode and the cones respec- 

 tively. Spicules of three kinds, viz. acerate, triradiate, 



