NEW GENERA AND SPECIES. SpOUg, 11 
S. angulo-spicatus^ id. 1 . c. p. 346, pi. xxviii. fig. 8. Spicules undulating 
acerate. J amaica. 
S. fuliginosus, id. 1 . c. p. 347, pi. xxviii. fig. 9. Skeleton spicules all 
spined. Colour black. 
Tetliea maza, (11) p. 472, pi. xxviii., between tide marks, Bay of Rio 
de Janeiro. Produces immense numbers of buds; they are penetrated 
by ciliated chambers from the parent. Subcortical cavities formed by 
splitting of the mesoderm, and therefore comparable to the body cavity 
of higher animals. 
2'ethea caudata, Deszo (Schmidt, MS.), (3) p. 628, Mexico ; mentioned, 
and its body-layers described. 
Alectona^ Carter, (2) p. 494. Based on an excavating variety of Corti- 
cium wallichi, Carter, here named by the same author Alectona millari^ 
and figured, pi. xvii. Found boring in AmphiheUa oculata, and also 
partially free. Atlantic, north of Scotland. 
Stellettinopsis, Carter, (1) p. 348. S. corticata, id. 1. c. p. 348, pi. xxviii. 
figs. 10-16, Port Adelaide, Australia ; S. simplex^ id. 1. c. p. 349, pi. xxviii. 
figs. 16-18, Torres Straits?. Both have long, smooth, acerate skeleton, 
and minute stelliform flesh spicules, and either sccptriform or bacillar 
flesh spicules besides. 
Hemiastrella, Carter, (1) p. 146. Spiculation half composed of bodi- 
less stellate spicules ; the remainder of linear spicules. H. typus, Carter, 
1. c. pi. xxi. fig. 9, Marine ; II. affinis, id. 1. c. p. 147, pi. xxi. fig. 10. 
Axos Jlabelliformis, Carter, (1) p. 285, pi. xxvi. figs. 1-4, Australia?. 
A. spinipoculum, id. (1) p. 286, pi. xxv., Port Jackson, Australia; cf. id. 
op. cit. (6) iv. p. 106. 
Tetilla radiata, Selenka, (11) p. 468, pi. xxvii. figs. 1-4, 6-8, Bay of 
Rio de Janeiro, 3 fath. Budding observed. It has eight regularly- 
branching longitudinal water-canals. 
Lithistid^ of Gulf of Mexico, Schmidt (8). 
(а) Anomocladina. 
Vetulina, p. 19. Based on V. stalactites, sp. n., id. 1. c. pis. i. fig. 1, 
ii. fig. 9. Distinguished by the centres of the skeleton spicules being 
enlarged by outgrowths of adjacent spicules, as well as by addition of 
layers of siliceous matter. Barbadoes, 100 fath. 
(б) Tetracladina. 
Tereopsis, p. 20, pi. ii. fig. 10. No species named ; connected perhaps 
with Terca, Zitt. ; 80-92 fath. 
Rimella, p. 21. Based on R. clava, sp. n., id. 1. c. pis. i. fig. 2, ii. figs. 5, 
7, & 11. Agrees with Aulaxinia, Zittel, in outward form, but Wants the 
distinct superficial layer of that species, and differs from it in the shape 
of the spicules. Near Havannah, 292 fath. 
Collinellay p. 21. Based on C. inscripta, sp. n., 1. c. pis. i. fig. 3, ii. 
fig. 12. Agrees closely with Trachysycon, Zittel. Near Morro Light, 292 
fath. 
Discodermia amphiaster, p. 23, pi. iii. fig. 4, near Havannah ; D. 
nucerium, id. 1. c. p. 25, pi. i. fig. 4, pi. iii. figs. 1 a-7, 6, latitude of 
Havannah, 120-240 fath. 
