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The antennae, mandibles, maxillae and maxillipedes are of the usual Safpphzrina type. 
Male unknown. 
The female of this species is readily separated from any of the other members of the 
genus by the long narrow furcal joints, and by the outer margin of the joints being nearly 
straight and without setae. 
Occurrence. — One specimen was obtained from the plankton collected at Station 
136, off Ternate Island, Molucca Passage. 
Genus Copilia Dana, 1849. 
The males of this genus resemble the males of Sapphzrzna in general appearance, but 
they can readily be separated by their very elongate and narrow furcal joints. The females are 
easily recognised by the large and somewhat quadrangular cephalic segment, by the moderately 
long anal segment, and by the long slender furcal joints. 
Three species were represented in the plankton collected by the ‘Siboga’ in the Malay 
Archipelago. 
1. Copitlia mirabilis Dana. 
Copilia mirabilis Dana, 1852, p. 1232, pl. 86. 
Copilia mirabilis Brady, 1883, p. 117, pl. LIII, figs. 1—11. 
Copilia mirabilis Giesbrecht, 1893, p. 647, pl. 50. 
Copilia mirabilis T. Scott, 1893, p. 113. 
Copilia mirabilis 1. C. Thompson, 1900, p. 289. 
Copilia mirabilis Cleve, 1901, p. 6. 
Copilia mirabilis A. Scott, 1902, p. 420. 
Copilia mirabilis Thompson & Scott, 1903, p. 286. 
Copilia mirabilis Cleve, 1903, p. 360. 
This species proved to be comparatively common and widely distributed in the area 
traversed by the ‘Siboga’. It was present in the plankton collected at the following stations. 
Stat. 16. — Stat. 36. — Stat. 47°. — Stat. 66. — Stat. 75 (HENSEN vertical net, 11 metres 
to surface). — Stat. 81. — Stat. 89. — Stat. 93. — Stat. 96 (day). — Stat. 96 (night). — 
Stat. 98. — Stat. 99. — Stat. ro1. — Stat. ro6. — Stat. 110. — Stat. 117%, 430 speci- 
mens. — Stat. 118 (HENSEN vertical net, 900 metres to surface). — Stat. 121. — Stat. 
124. — Stat. 125. — Stat..128 (HENSEN vertical net, 700 metres to surface). —- Stat. 129. — 
Stat. 133. — Stat. 136. — Stat. 141 (HENSEN vertical net, 1500 metres to surface). — 
Stat. 144. — Stat. 146. — Stat. 157. — Stat. 165. — Stat. 169. — Stat. 172. — Stat. 
177°. — Stat. 184. — Stat. 185 (HENSEN vertical net, 1536 metres to surface). — Stat. 189°. — 
Stats. 194—7. — Stat. 203 (HENSEN vertical net, 1500 metres to surface). — Stat. 204. — 
Stat. 213. — Stat. 214. — Stat. 215%. — Stat. 216. — Stat. 217 (horizontal cylinder). — 
Stat. 220 (HENSEN vertical net, 200 metres to surface). — Stat. 220 (surface). — Stat. 223. — 
Stat. 224. — Stat. 225. — Stat. 252. — Stat. 276 (HENSEN vertical net, 750 metres to 
surface). — Stat. 282. — Stat. 304. 
The female of this species can readily be recognised by the comparatively long and 
narrow anal segment, and by the furcal joints being about two and a half times longer than 
the anal segment. 
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