18 Spong. 
SPONGIiE. 
termed R. stelligera , 0. S., by Hanitsch. The author gives the following 
list of species : — 
R. stuposa , Mont., = Dictyocylindrus stuposus , Bwk. ; R. rigida , 
Mont., = R. stelligera, Hanitsch; R. fascicular is, Bwk. ( Dictyocylindrus 
fascicularis , Bwk.) ; R. ventilabrum , Bwk. ( Dictyocylindrus ventilabrum , 
Bwk.), = R.viminalis , Hanitsch ; 7?. hispida, Mont. ( Dictyocylindrus his- 
pidus , Bwk.) ; 72. viminalis, 0. S. 
Raspailia ( Syringella ) falcifera , n. sp., Topsent, (6)p. 152, pi. vi, fig. 14. 
Reniera filholi, n. sp., eVf. (2) p. 65. 
Reniera ingalli , Bwk. ; for description of skeleton and spiculation see 
Hanitsch, p. 199. 
Reniera viscosa , n. sp., Topsent, (6) p. 149. 
Rhabdercemia guernei , n. g. & sp., id. (1) p. 28. 
Rhaxella perforata , n. g. & sp., Hinde. 
Sarcomus georgi, n. g. &• sp., Fol, p. 1209. 
Seiriola compacta , Hanitsch ; for redescription see Hanitsch, pp. 221- 
227, pi. xiii, figs. 1-4. It turns out to be a Stellettid, which was 
incrusted by a Suberites, and belongs to the subfamily Sanidasterince of 
the Stellettidce. 
Siphonochalina ceratosa, n. sp., Dendy, (1) pp. 356 & 357, pi. lviii, figs. 
1, la, & pi. lxii, fig. 2. 
Siphonochalina procumbens, Carter ; for description see id. (1) p. 355, pi. 
lviii, fig. 4, & pi. lxii, fig. 1. 
Siphonochalina spiculosa , n. sp., id. (1) p. 354, pi. lviii, figs. 2, 2a, & 
pi. lxii, fig. 3. 
Spanioplon fertilis, n. g. & sp., Topsent, (1) p. 31. 
Spinosella plicif era, Duch. & Mich.; for description see Dendy, (1) 
p. 363, pi. lviii, fig. 5, & pi. lx, fig. 1. 
Spinosella maxima, n. sp., id. (1) p. 365, pi. lxi. 
Spinosella sororia, Duch. & Mich. ; for description see id. (1) p. 360, pi. 
lviii, fig. 7, & pi. lix, fig. 1. 
Spinosella sororia, Duch. & Mich. — 
(a) n. var. dilatata, Dendy, (1) p. 361, pi. lviii, fig. 6, & pi. 
lxiii, fig. 2. 
(b) n. var . fruticosa, id. (1) p. 361, pi. lix, fig. 3. 
(c) n. var. elongata, id. (1) p. 362, pi. lxiii, fig. 1. 
Spinosella velata , n. sp., id. (1) p. 366, pi. lix, fig. 2. 
Spirastrella aculeata, n. sp., Topsent, (2) p. 69. 
Spongilla fragilis, Leidy ; for description see Sovinsky. 
Stelletta : — 
Yon Lendenpeld (10) gives full descriptions of the following 
species : — 
1. S. grubei, O. S., under which is included S. grubei , O. S., S. collingsii , 
' (Bwk.), Sollas, Tethya schmidtii, Bwk., Collingsia sarneensis, 
Gray, Stelletta anceps , O. S. ( Astrella anceps, Sollas). 
2. S. dorsigera , O. S. (. Astrella dorsigera, Sollas), including Stelletta 
grubei, Marenzeller. 
