GENERAj SPECIKS, &C. 
Spong. 5 
(vide infr^), Craticularia, g. n., P Euhrochus^ Sollas, SpJienaulax^ g. n., 
Sporadopyle, g. n., Sclerothamnus, Marsh., Farrea, Bowb., Eurete^ Marsh., 
Verrucoccelia^ Etallon, Aulodictyon^ Kent). 
Fam. 3. Coscinoporidoe. 
(Genera, ? Bothroconis, King, Leptojihragma, g. n., Pleurostoma, Rom., 
Guettardia, Mich., Coscinopora, Goldf.) 
Fam. 4. Mellitionidce. 
(Genera, AphrocalUstes, Gray, P Fieldingia^ Kent, Stauronema, Sollas.) 
Fam. 5. Ventriculitidce. 
(Genera, Pachyteichisma g. n., Trochoholus, g. n.. Ventriculites, 
Mantell, ScJiizo\r] rhahdus,g. n., Tretostamnia, Pomel ; Rhizopoterion, g. n., 
Sporadoscinia, Pomel (emend. Zittel) ; Licmosinion, Pomel, Polyblasti- 
dium, g. n., Cephalites, Toulm. Smith (pt.) ; Lepidospongia, Rom.) 
Fam. 6. Staurodermidce. 
(Genera, Cypellia, Pom., Staurnderma, g. n., Porocypellia, Pom., Ca- 
searia, Quenst., Porospongia, D’Orb., OpTirystoma, g. n., ? Placochlcenia, 
Pom.) 
Fam. 7. Maiandrospongiidai, Zitt. 
(Genera, Plocoscyphia, Reuss., Dactylocahyx, Stutchb., Periphragella, 
Marsh., Myliusia, Gray, pt., Tremaholites, g. n., Etheridgia, Tate, Toul- 
minia, g. n., Camerospongia, D’Orb., Cystispongia, Rom.) 
Fam. 8 . Gallodictyonidce. 
(Genera, Callodictyon, g. n., Marshallia, g. ri., Bechsia, Schliit., Pleurope, 
g. n., Diplodictyon, g. n.) 
Fam. 9. Gceloptychiidce. 
(Genus, Cceloptychium,Qo\di.) 
II. Lybsaktna. 
Fam. 1. Monacidce. 
(Genera, Acanthospongia, McCoy, Stauractinella, g. n., ? Acestra, Rom.) 
Fam. 2. Plionacidce. 
(Genera, Asconema, Kent, Lanuginella, Sdt. 
Fam. 3. Pollacidoe. 
(Genera, PLoltenia, Sdt., Pheronema, Leidy, Crateromorpha, Gr., Ros- 
sella, Cart., Sympagella, Sdt., Placodictyon, Sdt., Euplectella, Owen, 
Hahrodictyon, W. Th., Laharia, Gr., Meyerina, Gr., = Semperella,Mn,vBh., 
Hyalonema, Gr.) 
Sollas (19), by experiments on Dactylocalyx pumiceus, D. suhglobosa, 
Myliusia callocyathes, Farrea, and Aphrocallistes, elucidates facts as to 
their original spicule structure. Some spicules appear capitate instead of 
plain. 
Myliusia grayi, Bk., (2) p. 126, pi. ix. figs. 8-17. Figured, with its 
structures, for the first time. The peculiar fibre-nodes distinguish it from 
M. callocyathes and connect it with Ventriculites, &c. 
Sclerothamnus clausi. Marsh. (12). Redescribed and well figured as 
Dendrospongia steerii, Murie (p. 220, and pis.), from the Philippines, pro- 
bably 70-100 fathoms. The indication of a “ veil,” the spinous fibres, 
and the scopuline and other spicules are pointed out. 
Hyalonema longissimum, Sars, (18) p. 55. Taken in 430 fathoms, St. 
