XXVlll 
THE VOYAGE OF H.M.S. CHALLENGER. 
been gradually pressed by the more prolific and hardier shallow-water forms deeper and 
deeper into the ocean. In the case of Lecena and Placostegus, again, both are members 
of genera not unknown in comparatively shallow water, and even between tide-marks. 
Station 253. Mid Pacific; lat. 38° 9' N., long. 156° 25' W.; 3125 fathoms; red clay 
(dredged). 
Lecena ahyssorum, n. sp. | Placostegus henthalianus, n. sp. 
Surface of the sea at Honolulu. 
Alciopa quadrioculata, n. sp. | Alciopa sp. {V). 
Greeffia oahuensis, n. sp. 
G. South Pacific Eegion. 
The majority of the specimens from this area come from the Strait of Magellan, the 
confined waters of which seem to be favourable for their development. Of characteristic 
forms the most striking are Aj)hrodita echidna, De Quatrefages, two species of Lagisca, 
Eunoa opalina, Leanira magellanica, Eunice, Nothi'ia, Plemipodus, Sarny thoq)sis, 
Eupista, and Euthelepus. 
Station 272. Mid Pacific; lat. 3° 48' S., long. 152° 56' W.; 2600 fathoms; Radiolarian 
ooze (trawled). 
Myriochele paeijiea, n. sp. 
Off Tetuaroa Islands. 
Glyeera sagittarice, n. sp. 
Station 285. Pacific ; lat. 
(trawled). 
32° 36' S., long. 137° 43' W.; 2375 fathoms; red clay 
Placotegus morchii, n. sp. 
Station 298. Off the west coast of South America; lat. 34° 7' S., long. 73° 56' W.; 
2225 fathoms ; blue mud (trawled). 
Lumbriconereis ahyssorum, n. sp. 
Nothria pycnobranchiata, n. sp. 
ehlersi, n. sp. 
Maldanella valparaisiensis, n. sp. 
Samythopsis grubei, n. sp. 
Eupista darwini, n. sp., A. 
