10 Myr . 
XII. MYRIOPODA AND PROTOTRACHEATA. 
Spirobolidas. 
Acanthiulus, Gerv., is allied to Spirobolus , murrayi , Aru Is., p. 136, pi. ix, 
fig. 7, Pocock, Ann. Nat. Hist. (6) xi, n. sp. 
Spirobolus spinigerus, Wood, is a synonym of S. marginatus , Say ; Boll- 
man, Bull. U. S. Mus. xlvi, p. 145. S. monilicornis , Porat, syn. heil- 
priniy Bollm., and probably virescens, Daday, recorded from Bermuda, 
p. 138, dorsalis (Le Guillou), Aru Is., described, p. 140, figured 
pi. ix, fig. 8 ; Pocock, Ann. Nat. Hist. (6) xi. S. pulvillatus and 
simillimus , Newp., are synonymous with each other, and with giganteus 
of Porat, and ligulatus of Yoges, caudatus , Newp., syn. la?tus } 
Karsch, roseus, Gervais, syn. costulatuSy Porat, and S. hecate of 
Butler is a Spirostveptus j Pocock, t. c. pp. 249 & 250. 
S. dentatusy p. 3, fenicheliy p. 4, New Guinea, Daday, Math. term. Ertes. 
Magyar Ak. xii ; S. erythrocephalus, Madagascar, p. 250, pi. xvi, 
fig. 2, urophorus, Seychelles, p. 251. pi. xvi, fig. 3, naresii , Seychelles, 
p. 252, pi. xvi, fig. 4, hoplurus. N. VV. Borneo, p. 252, pi. xvi, fig. 5, 
caledonicus, New Caledonia, p. 253, pi. xvi, fig. 6, Pocock, Ann. Nat. 
Hist. (6) xi ; S. digrammus, Cape Town, p. 138, pi. ix, fig. 9, 
challengeriy Ki Is., p. 139, pi. ix, fig. 10, Jlavo-collariSy Aru Is., p. 140, 
pi. ix, fig. 11, hcemorrhantuSy Ki Is., p. 141, pi. ix, fig. 12, Pocock, 
t. c. ; S. graciliSy Paramaribo, p. 190, callipus } Guanajuato, p. 191, 
bahamensisy Bahamas, p. 192, surinamensis } Paramaribo, p. 192, 
zonipuSy Paramaribo, p. 194, dugesi , Guanajuato, p. 194, Bollman, 
Bull. U. S. Mus. xlvi ; S.moulmeinensisy Moulmeiu, p.395, macruruSy 
Teuasserim, p. 396, dollfusiiy Cochin China, p. 397, sj)icidifer } 
S. Tenasserim, p. 397, fees, Carin Cheba, p. 398, gestri , Malewoon, 
p. 399, elevatuSy Bhamo, p. 399, macidifery Mt. Mooleyit, p. 401, 
Pocock, Ann. Mus. Genova, xxiii ; S. Iceviventris , Cameroous, p. 29, 
crassusy Zanzibar, p. 31, arcuosus , Damara, p. 31, pocockiy Cape Town, 
p. 32, sabulosoidesy Cape Town, p. 33, Porat, Bih. Svenska Ak. 
xviii, No. 4 : n. spp. 
Spirostreptida-]. 
Alloporus bipunctatu8, Free Town, Sierra Leone, p. 27, pi. ii, figg. 15 & 
16, Cook & Collins, Ann. N. York Ac. viii, n. sp. 
Odontopyge furcata , Karsch, Loanda, described, p. 36, fig., pi. iii, figg. 
24-28 ; Cook & Collins, Ann. N. York Ac. viii. 
O. dimiatiformiSy Delagoa Bay, p. 44, Porat, Bih. Svenska Ak. xviii, 
No. 4, n. sp. 
Spirostreptus erythropareiuSy Brandt, and rubripes, Newp., are synonymous, 
p. 135; Pocock, Ann. Nat. Hist. (6) xi. S. syriacus , Sauss., described 
from Syria, p. 77, fig. 6 ; Porat, Rev. biol. Nord France, vi. S. 
attenuatusy Brandt, Namaqua, p. 36, pachysoma , Brandt, Namaqua, 
p. 37, hildebrandtianusy Karsch, Madagascar, p. 40, earner oonensis , 
