ANNELIDA. 
Verm. 33 
Systematic. 
Apionsoma, n. g. for A. trichocephalus, n. sp., Indian Archipelago, structure, 
Sluiter, Siboga Exped. xxv, p. 42, pi. iv, figg. 8-11. 
Aspidosiphon corallicola , p. 19, pi. ii, figg. 1-8; A. spiralis , p. 25 ; A. cris- 
tatus, p. 26, pi. ii, figg. 14-16; A. spinosus , p. 28, pi. ii, figg. 17-19; 
A. inquilinus , p. 29, pi. ii, figg. 21 &22; Indian Archipelago, structure, 
Sluiter, t. c., n. spp. 
Dendrostoma spinifer , Indian Archipelago, structure, Sluiter, t. c., p. 41, 
pi. iv, figg. 6 & 7, n. sp. 
Hamingia sibogce, Indian Archipelago, structure, Sluiter, t. c., p. 44, pi. iv, 
fig. 12, n. sp. 
Lithacrosiphon, n. gen. for L. maldivense , n. sp., Maidive Islands, anatomy 
and histology, Shipley, Fauna Maidive i, 2, p. 137, pi. vii. 
Phascolion hirondellei , Canary Islands [not described], Monaco, C.R. Ac. 
Sci. cxxxiv, p. 962. 
P. hirondellei , Gulf of Gascon}^ and Azores, p. 7, pi. ii, figg. 1-6, P. alberti, 
Cape Finisterre, p. 9, pi. i, figg. 1 & 2, pi. iii, fig. 1 & 2, Sluiter, 
Resultats Monaco xv; P. parvus , p. 30, pi. iii, figg. 1 & 2; P. phare- 
tratus, p. 31, pi. iii, figg. 3—5 ; P. convestitus, p. 32, pi. iii, figg. 6-9; 
Indian Archipelago, structure, Sluiter, Siboga Exped. xxv : n. spp. 
Phascolosoma ; brain, Herubel, C.R. Ac. Sci. cxxxiv, pp. 1603-1605. 
Phascolosoma vulgare , nephridia, and urns, Cuenot, Arch. Zool. exp. (3) x, 
No. 1, pp. 85 & 86, fig. 3 ; peritoneal elements (urns), Herubel, Bull. 
Soc. zool. France xxvii, pp. 105-117, 4 figg. 
P. reconditum , Azores, p. 11, pi. ii, figg. 7 & .8, pi. iii, figg. 3 & 4, Sluiter, 
Resultats Monaco xv ; P. vulgare var. tropicum , n. var. p. 33, P. 
jimbricatum , p. 34, P. subhamatum, p. 35, pi. iii, figg. 10-12, P. angui- 
neum , p. 36, figg. 13-16, P. filiforme , p. 37, figg. 1-4, P. confusum , 
p. 38, pi. iv, fig. 5, P. depression, p. 39, pi. iii, figg. 17-20, P. mucidum , 
p. 40, P. immunitum , Indian Archipelago, structure, Sluiter, Siboga 
Exped. xxv : n. spp. 
Physconosoma granulation, urns free in coelome, Cuenot, Arch. Zool. exp. 
(3) x, No. 1, pp. 82-84, fig. 2. 
P. hebes, p. 13, pi. i, figg. 5 & 6, P. glabrum, p. 14, pi. i, figg. 7 & 8, P. extor- 
tum, p. 15, pi. i, figg. 9 & 10, P. spongicola, p. 16, pi. i, figg. 11 & 12, 
Indian Archipelago, structure, Sluiter, Siboga Exped. xxv, n. spp. 
Priapulus caudutus (= P. tuberculato-spinosus De Guerne), Cape Adare, 
Shipley, Southern Cross, p. 284. 
Sipunculoidea, general anatomy, Shipley, Enc. Brit, xxxii, pp. 636-638, 
4 fi §g- 
Sipunculus, anatomy, Gineste, Pr.-verb. Soc. Bordeaux lvi, pp. clxiii-clxv. 
Sipunculus nudus, anatomy, histology and development of the nervous 
system, Mack, Arb. Inst. Wien xiii, pp. 237-334, 5 pis., 17 text-figg.; 
S. nudus, S. tessellatus, structure and significance of urns, Cuenot, 
Arch. Zool. exp. (3) x, No. 1, pp. 79-82, 1 fig. 
S. nitidus, Azores, Sluiter, Resultats Monaco xv, p. 14, pi. i, fig. 45, pi. iii, 
figg. 10 & 11 ; S. inclusus, p. 6, S. cequabilis, p. 7, S. claviger, pi. i, 
figg. 1 & 2, S. pellucidus, p. 9, pi. i, fig. 3, S. infrons , p. 10, pi. i, fig. 4, 
Indian Archipelago, structure, Sluiter, Siboga Exped. xxv, n. spp. 
Thalassema ; cell-lineage of the mesoblast-bands and mesenchyme, Torrey, 
Science xv, p. 576 ; early development of mesoblast, Torrey, Anat. 
Anz. xxi, pp. 247-256, 3 figg. ; eggs at Beaufort, N. C., Torrey, Ann. 
N. York Ac. xiv, p. 137. T. erythrogrammon, p. 128, pi. vi, fig. 1, 
T. diaphanes, fig. 2, T. moebii, p. 129, figg. 3 & 3 a & B, T. sermoni, 
fig. 4, Maidive Islands, characters, Shipley, Fauna Maidive i, 2. 
Thalassema indivisum, North Spain, Sluiter, Resultats Monaco xv, p. 18; 
T. ovatum, Indian Archipelago, structure, Sluiter, Siboga Exped. 
