NEW OENERA AND SPECIES. SpOYig . 17 
Microciona tumulosa, id. 1. c. p. 50, pi. xi. figs. 1-4, Westport Bay, Ire- 
land. 
Thalysias repens , var. n., Carter. This author, (2) p. 282, pi. xi. fig. 10, 
thus describes a repent form of T. subtriangularis from the W. Indies. 
Auletta elegans, Yosmaer, (17) p. 40, pis. i. fig. 20, iii. fig. 70, iv. fig. 158, 
off Novaja Zemlya, described as a Chaliuid. 
Spongillidje. 
Spongilla sceptroides , S. botryoides , W. A. Haswell, P. Linn. Soc. 
N. S. W. vii. p. 209, in pond, Brisbane, Now South Walos, 
Spongilla bombayensis , Carter, (5) p. 3G9, pi. xvi. figs. 5 & G, Island of 
Bombay ; the chitinous coat of the gemmule contains spicules and serves 
to attach it to foreign bodies. 
Spongilla sibirica, Dybowski, (6) p. 10, fig. 12. 
Spongilla stygia , Joseph, JB. schles. Ces. lix. p. 253 [not seen by the 
Recorder]. 
Meyenia ramsayi, W. A. Haswell, River Bell, Wellington, N. S. Wales, 
P. Linn. Soc. N. S. W. vii. p. 210,; another species of Meyenia from 
reservoirs, Sydney, not named, id. ibid. 
Meyenia acuminata, Potts, P. Ac. Philad. 1882, p. 69, mixed with another 
species, from an aqueduct connected with Boston, U.S. Some abnormal 
features of the structure and spiculation are considered to suggest a 
possible hybridization between two species in this case. 
Meyenia crateriformia [-is], Potts, (14) p. 12, from Schuylkill and 
Brandywine Rivers, &c. 
Ileteromeyenia ryderi , id. 1. c. p. 13, from branch of Delaware River. 
Tubella pennsylvanica , id. 1. c. p. 14, Lehigh Gap, Pennsylvania. 
Desmacidinid^e. 
Esperia Icevis , Carter, (2) p. 291, pi. xi. fig. 16, Puerto Cabello, W. 
Indies; E. obscura , id. 1. c. p. 299, pi. xi. fig. 18, Freemantle, W. Aus- 
tralia ; E. cunninghami , id. 1. c. p. 300, pi. xi. fig. 17, Falkland and Otter 
Islands, Patagonia ; E. plumosa , id. 1. c. p. 299. 
Esperia lanx, Yosmaer, (17) p. 44, pi. iii. figs. 89-95, Barents Sea. 
Rhaphiodesma fallaciosum , intermedium , Bowerbank, (1) pp. 163-166, 
pi. xvii., West of Ireland. 
Esperiopsis , Carter, (2) p. 296. Without diagnosis ; placed among 
the Hymedesmina ; based on Esperia villosa , Carter, removed from 
Esperia because its anchorate spicule is equianchorate. 
Ilymedesmia schmidti , id. 1. c. p. 297, pi. xi. fig. 21, = Desmacidon 
[evidently intended for Desmacella ] johnstoni , Schmidt, from Florida. 
Ilalichondria isodictyalis , id. 1. c. p. 285, pi. xi. fig. 2, Puerto Cabello, 
W. Indies, and Acapulco. 
Ilalichondria pustulosa , id. ibid. pi. xi. fig. 1, between Patagonia and 
Falkland Islands. 
Alebion piceum , Yosmaer, (17) p. 42, pis. i. fig. 19, iii. figs. 75-82, 
Barents Sea. 
Fibularia , Carter, (2) p. 282. Without diagnosis ; the 3 new species 
included in it, viz., F. massa , from Long Key Island, Nassau, ramosa , 
