SYSTEMATIC. 
Spong. 27 
(b) Order TETRACTINELLIDA. 
(1) Sub-order CHORTSTIDA. 
Tribe SIGMATOPHORA. 
Family Tetillida:. 
Ckrotella Soil., diagnosed; C. minuta , n. sp., from Mayaguez Harbour, 
Porto Rico, 220-225 fathoms; Wilson (71) p. 383. 
Cinachyra Soli., diagnostic list of known species, p. 219 ; C. malaccensis , 
n. sp., from Pulau Bidang, Malay Peninsula, pp. 219 & 220, pi. xiv, 
fig. 2, pi. xv, fig. 5 : Sollas (58). 
Spongocardium, n. g., allied to Cinachyra Sollas, for S. gilchristi , n. sp., 
from Cape Natal, South Africa, 185-200 fathoms; Kirkpatrick (28) 
pp. 224 & 225, pi. ii, figg. 1 & la, pi. iii, fig. 1. 
Tctilla honaventura , n. sp., from False Bay, South Africa, 22 fathoms, 
p. 226, pi. ii, fig. 2, pi. iii, fig. 2; T. casula (Crtr.), from False Bay, 
South Africa, 22 fathoms, redescribed, pp. 226 & 227, pi. ii, figg. 3 & 
3a: Kirkpatrick (28). T. ridleyi Soli., redescribed; Sollas (58) 
pp. 218 & 219. 
Tribe ASTROPHORA. 
Family Asterostreptidal 
Asterostreptidce, n. fam. of Choristida , characterised by streptasters, 
equivalent to the group Streptastrosa Sollas after subtracting the 
genera Placinastrella F. E. S., Dercitus Gray (inch Stoeba Soil, and 
Calcabrina Soil.) and Corticella Soil, (inch Calthropella Soil.); com¬ 
prising (1) subfamily Theneince , n. subfam. (9), for the genera Thenea 
Gray, Sphinctrella Schmidt, and Pcecillastra Soli.; (2) subfamily 
Packastrellince, n. subfam. (p. 10), for the genera Pachastrella Schmidt, 
Nethea Soil., Characella Soil., and Triptolemus Soil.: Topsent (62). 
Characella Soli., diagnosed, p. 11; the genus comprises C. pachastrelloides 
(Crtr.), (inch C. sollasi Tops., and perhaps C. aspera Soli.), C. stellettodes 
(Crtr.), C. agassizi Soil., and C. saxicola Tops., pp. 15 & 16 : Topsent 
Nethea Soil., diagnosed, p. 11; the genus includes three species, A . nana 
(Crtr.), N. amygdaloides (Crtr.), and N. connectens Schmidt, p. 15: 
Topsent (62). 
Pachastrella Schmidt, diagnosed, p. 10 ; the genus includes only two 
known species, P. lithistina Schmidt, and P. monilifera Schmidt; the 
latter is the type-species and includes P. abyssi Schmidt and P. 
ovisternata Lend.; P. lesinensis Lend, is a Sanidasterine (vide Derci- 
tancorina ), pp. 13-15 : Topsent (62). P. calicidata , n. sp., from oft' 
Durnford Point, Natal, 90 fathoms, pp. 227 & 228, pi. ii, fig. 4, pi. iii, 
fig. 4 ; P. isorrhopa , n. sp., from Cone Point, Natal, 34 fathoms, 
pp. 228 & 229, pi. ii, fig. 5, pi. iii, fig. 5 [vide etiam n, d, vi]: Kirk¬ 
patrick (28). tP. primceva Z., Schrammen (55) pp. 3 & 6. P. styli- 
fera Lend, is a synonym of Pcecillastra compressa Bwk.; Topsent 
(62) p. 12. 
Pcecillastra Soil., diagnosed, p. 10 ; P. amygdaloides Soil, belongs to the 
genus Nethea , p. 12; P. compressa Bwk. includes Pachastrella stylifera 
Lend., p. 12 ; P. synibiotica, n. sp., a small species from the Azores, 
living symbiotically with Spongosorites placenta , p. 13 : Topsent (62). 
