NEW GENERA AND SPECIES. 
Sjpong. 1 2 
Surface smooth, with separable dermis. Foreign bodies in simple tracts 
which run outwards from interior of sponge; no connecting or secondary 
fibres. Foreign bodies also found free in syncytium or connective tissue. 
P. ramosum, id. ibid. p. 109, pi. vii. figs. 12-15, pi. viii. figs. 1-5, "Bass’s 
Strait. Proportion of foreign bodies to tissues is as 3 to 1. All the speci- 
mens contained an Oscillaria. 
Psammopemma, Marshall, (7) p. 113. Firm, cake-shaped masses of sand 
penetrated by very fine canals ; no oscula or cloacal cavity ; protoplasm 
scanty; dermiscellular, slight, [transparent, and homogeneous. P. densum, 
id. 1. c. p. 113, pi. viii. figs. 6-11, Tasmania and Cape of Good Hope ; no 
trace of fibres in the arrangement of the foreign bodies. 
Khaphidonemata (Carter). 
Chalina fangophila, Schmidt, (9) p. 80, pi. ix. fig. 2, Gulf of Marseilles. 
A rooted species, intermediate between Chalinp, and Reniera. 
Siphonochalina viridescens, Schmidt, (9) p. 76, Barbadoes, 100 fath. 
Rhizochalina amp>liirrhiza, Schmidt, (9) p. 76, pi. vi. fig. 12, Caribbean 
Sea ?, 40 fath. R. ? fihulata, id. ihkl.^ Barbadoes, 288 fath. 
Echinonbmata (Carter). 
\x Microciona affinia^ Carter, (1) p. 41, pi. iv. fig, 15. M. bulbo-retorta, id. 
ibid. p. 41, pi. iv. fig. 3. M. quadriradiata^ id. ibid. p. 42, pi. iv. fig. 4, 
identical with a species already recorded from W. Indies. M. quinque- 
radiata, id. ibid. p. 43, pi. iv. fig. 5. M. curvispicnlifera, id. ibid. p. 43, 
pi. iv. fig. 6. M. fascicalispiculifera, id. ibid. p. 44, pi. iv. fig. 7, all from 
Gulf of Manaar. 
Ilymerrhaphia unispiculum, Carter, (1) p. 45, pi. iv. fig. 8, II. eruca, id. 
ibid. p. 46, pi. iv. fig. 9, Gulf of Manaar. 
P achy chalinop sis, Schmidt, (9) p. 80. Based on an unnamed species, 
said to bear the same relation to Chalinopsis as Pachyclialina does to 
Ohalina. 
Siphonochalinopsis, Schmidt, (9) p. 80. Formed for a tubular species of 
Chalinopsis, to which no specific name is assigned. 
Dictyocylindrus manaarensis, Carter, (1) p. 37, pi. iv. fig. 1, and D. 
sessilis, id. ibid. p. 38, pi. iv. fig. 2, Gulf of Manaar. 
Phacellia plicata, 0. Schmidt, Arch. mikr. Anat. xviii. p. 282, Gulf of 
Naples, very slightly described. 
Holorrhaphidota (Carter). 
Ilalichondria acerato-spiculam, Carter,[(l) p. 49, pi. v. fig. 19, Gulf of 
Manaar. Near H. incrustans. 
Hymedesmia stellivarians. Carter, (1) p. 50, pi. iv. fig. \0,II. moorii,\d. 
ibid. p. 60, pi. iv. fig. 11. II. spinalo-stellifcra,\A. ibid. p. 51, pi. iv. fig. 13, 
II. capitato-stellifera, id. ibid. p. 51, pi. iv. fig. 12, II. trigono-stellata, id. 
ibid. p. 52, pi. iv. fig. 14, all from Gulf of Manaar. 
Rhaphiodesma minima. Waller, J. Quck. Club, 1880, p. 103, pi. v. 
figs. 2-7, Torquay. 
Amphilectus, Vosmaer, (13) p. 109. Desmacidince with linear spicules, 
smooth or spiued ; anchorates bi- or tri- dentate, or palmato-dentate, with 
similar or dissimilar ends. Neither true “ keratode fibre ’’ as in Desma- 
cidon, nor total absence of it as in Myxilla. It constitutes a central group 
