506 
rilOTOZOA. 
the long pointed process from the central boss projecting inwards towards 
the axis of the sponge. A thin sarcode-layer, abounding in stellate spicules, 
which vary much in size, covers the whole of the body and stem. One 
remarkable spicule (bifurcated expando-ternate) seems to terminate the 
axis in the centre of the large osculum. TF. wallichi, dredged in 1013 
fathoms, in lat. 58° 23' N., long. 48° 50' W. 
Doroillia agariciformisy gen. et sp. nov., Kent (M. Micr. J. 1870, p. 293), 
Brit. Mus. ; locality unknown. 
This is certainly the same as that described by Perceval AVright as Wyville- 
thomsonia, and is also very probably the species referred to by Bowerbank, 
^ Brit. Sponges,’ vol. i. p. 22, as Tethea muricata, Bbk. MS. Bowerbank does 
not describe the species which Gray made into a genus, Thenea (P. Z. S. 
1807, p. 541). The species should therefore stand m Thenea wallichi (E. P. 
Wright). 
Tethyopsis columnifer, gen. et sp. nov., Stewart (Q. J. Micr. Sc. July 
1870, p. 281), Philippine Islands. 
Teihya atropurpureay sp. n.. Carter (Ann. N. H. (4) vi. p. 176), locality 
unknown. 
Trachya, gen. nov., Carter (Ann. N. II. (4) vi. p. 178). Asperous, massive, 
cake-shaped, free or fixed, dense, rigid, osculiferous. Internally multi- 
nucleate. Spicules of two kinds only, viz. large and small; large spicule 
smooth, fusiform-acerate ; small spicule, which is chiefly confined to the 
upper surface, smooth, fusiform-acuate. 2\ j)crmwleata, sp. n., A^era Cruz. 
The new genera and species of siliceous sponges described by 0. Schmidt 
(Spong. Atlaut.) are so numerous that the limits of the ‘ Record ’ hardly 
admit of a transcription of the generic diagnoses. AVe enumerate them 
below, arranged in the families now adopted by that author: — 
I. Hexactinjsllidje (= Vitrea, Wyville 'riiomson, except some 
species of JDactylocalyx auctt.). 
Lanuginella (g. n.) pupa (p. 13), Capo- Verde Islands. 
Holtenia pourialesi (p. 14), II. mccus (p. 15), Florida. 
Sympayella (g. n.) nux (p. 15), Florida. 
Placodictyon (g. n.) cucumaria (p. 16), Florida. 
Farrea fecunda (p. 16), between Florida and Cuba. 
Factylocalyx crispus (p. \Q)y = Myliusia callocyathus, Gray (?). 
II. Lithistid.e. 
Leiodermatium (g. n.). L.ramosum (p. 21), Florida; Z. lyncem (p. 22), 
Portugal. 
Corallides (g. n.)* typus (p. 22),=.l)actylocalyx prattii^ Bbk. (?), and 
Macandrewia azorica, Gray (.^), Florida; C. microtuberculatus (p. 23), Cape- 
Verde Islands; C. eleyantior (p. 23), Portugal; C. noU-tangere (p. 23), 
Portugal, Cape Verde; C. clavatella (p. 23), Florida; C. polydiscus, 0. Sdt. 
(p. = Discodermia poly discus, Bocage ; Lyidium (g. n.) torquilla (p. 84), 
Cuba, Cozera. 
III. Halisarcina — Gummineae. 
Cellulophana (g. n.) collectrix (p. 25), Florida, Tortugas. 
Columnitis (g. n.) squammata (p. 25), Antilles. 
Chondrilla phyllodes (p. 26), Antilles. 
