SYSTEMATIC. 
Spong. 23 
Family Hyalonematida. 
Hyalonematidce, the family to comprise five genera, Pheronema Leidy, 
Poliopogon Wyv. Thoms., Hyalonema Gray, Lophophysema F. E. S., 
and Semperella Gray, the subfamilies Hyalonematince and Semperellince 
to be abolished; Schulze (56) p. 4. 
Hyalonema Gray, remarks on, p. 10; H. aculeatum F. E. S., described, a 
doubtful species, based on specimens which are evidently young forms, 
pp. 31-33, pi. ii, figg. 1-14; H. affine Marsh, described, includes 
H. apertum F. E. S. and R. mcehrenthali F. E. S, pp. 27-30, pi. vii ; 
H. cdcocki F. E. S., described, pp. 23-26, pi. vi, figg. 1-8; H. heideri 
F. E. S., described, a doubtful species, p. 34, pi. ii, figg. 15-22; 
H. heymonsi F. E. S., described, perhaps a young form of II. indicum 
F. E. S., p. 36, pi. iii, figg. 14—18; H. indicum F. E. S., described, 
with two varieties, laccadivense and andamanense, n. varr. (formerly 
considered to be distinct species); perhaps includes H. pirum and 
H. heymonsi , pp. 10-13, pi. iii, figg. 1-3, pi. iv, figg. 1-14; H. in- 
vestigatoris F. E. S., described, pp. 26 & 27, pi. vi, figg. 9-17 ; II. 
lamella F. E. S., described, pp. 15-18, pi. xix; H. mcehrenthali 
F. E. S., proves to be a young form of H. affine Marsh, p. 10; II. 
martabanense F. E. S., described, pp. 21-23, pi. xviii; H. masoni 
F. E. S., described, pp. 13-15, pi. v (vide etiam n, d, vi); H. pirum 
F. E. S., described, perhaps a young form of H. indicum F. E. S., 
pp. 34 & 35, pi. ii, figg. 23-30; H. rapce F. E. S., described, p£>. 18-21, 
pi. xvii; H. weltneri F. E. S., described, pp. 36 & 37, pi. iv, figg. 15-24: 
Schulze (56). H. masoni F. E. S., occurrence, etc. [vide ii, d, vi]; 
Alcock (1). 
Lophophysema infiatum F. E. S., described; Schulze (56) pp. 38-41, 
pis. xx & xxi. 
Pheronema Leidy, characters of the genus, pp. 4 & 5; P. circumpalatum 
F. E. S., proves to be a young P. raphanus F. E. S., p. 5 ; P. raphanus 
F. E. S., described, includes P. circumpalatum F. E. S., pp. 5-10, pi. i, 
Schulze (56). P. raphanus , occurrence; Alcock (1), p. 146, fig. 18 
and p. 295. 
Semperella cucumis F. E. S., described; Schulze (56) pp. 41-46, pi. viii: 
occurrence; Alcock (1) p. 146. 
Family Receptaculitida:. 
t Ischadites ioivensis (Owen); Whiteaves (68) pp. 143 & 144. 
t Pasceolus gregarius Billings; Whiteaves (68), pp. 144 & 145. tP. (?) 
hospitalis for t Sphcerospongia hospitalis Salter, described; Feed (49) 
pp. 338 & 339, pi. xviii, figg. 6 & 7. 
t Receptaculites oweni Hall; Whiteaves (68) pp. 142 & 143. 
t Sphcerospongia hospitalis , vide Pasceolus. 
Family Pollakida. 
t Hyalosteliaparallela McCoy, and t H. smithi Young; Peach (45) pp. 361, 
380, & 381. 
(ii) DICTY0NINA. 
Family Farreida. 
Farrea Bwk., characters of the genus, p. 85; F. occa Bwk. (Carter) 
described, pp. 86 & 87; Schulze (56). 
