170 | JOURNAL OF SCIENCE. 
remotis obliquis reticulatis, areolis reticulatis ; clypeo ovali, 
postice latiori, foramine pulmonali postico; capite parvo; ten- 
taculis brevibus, ad apicem ferrugineis. Long. 2.5 poll. 
Bay of Islands, New Zealand, among turnips.—Dr. Pickering. 
Characterised by its sooty colour. Dr. P. has no doubt that 
it is a native species. 
Unio watkarense, Colenso (Tasmanian Fournal of Science, 
1844. “Memorandum of an Excursion in New Zealand,’ p. 
37).—Shell oblong or oblong-ovate, concentrically and irregularly 
sulcated, sub-diaphanous, inflated ; anterior side produced, ob- 
tuse, slightly compressed ; posterior slope keeled, sharp; base 
slightly depressed ; umbones decorticated flattish, much worn ; 
primary tooth large, crested ; epidermis strong, overlapping at 
margin, wrinkled on anterior slope ; colour brownish-yellow on 
posterior side, shading into dusky green on anterior, with 
alternate light coloured lateral stripes ; 3% inches broad (sic), 
2¥% inches long. 
Hab., Waikare Lake, mountains, interior of the North Island. 
NEW ZEALAND , PYCNOGONIDA,, ORE 
“CHALLENGER” EXPEDITION 
—_< 
Among the numerous specimens of Pycnogonida obtained 
during the last voyage of the “Challenger,” and which were 
handed over for examination and description to Dr. P. Hoek, of 
Leiden University, only three species were got in the New Zealand 
seas,and theseatconsiderabledepths. No littoral forms appear to 
have been gathered while the “ Challenger” was in Wellington 
Harbour. Two of these species belong to the genus Wymphon 
of Fabricius, but the third is a remarkable form, which Dr. Hoek 
places in a new genus Oorhynchus. The generic description of 
Nymphon is taken from M. Edwards’ “ Histoire Naturelle des — 
Crustaces,” vol. iii, p. 532. 
GENUS NYMPHON, fade. 
Body slender. Head (proboscis) cylindrical and obtuse at 
the extremity, First thoracic segment much longer than the 
others, and bearing on the middle of the upper surface a tubercle 
furnished with 4 small smooth eyes. Abdomen conical, amalga- 
mated with the last thoracic segment. Mandibles (fates 
michoires) one pair, terminated by an elongated claw, and carry- 
ing at their base a palp of 4 joints, inserted at the anterior 
extremity of the first thoracic segment. Four pairs of ambula- 
tory feet, very long and slender ; their 6th joint much elongated; 
terminal claw small; penultimate joint furnished at the extremity 
with two claw-like spines. Accessory feet (in the female) much 
more slender than the others, borne on the lower part of the ~ 
first body-segment, below the first pair of feet, and serving to 
support the eggs. 
1. Mymphon longicoxa, Hoek (lc. p. 58; Pl. IL, figs 1-5; Pl 
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