MARINE COPEPODA OF NEW ZEALAND. 43 
Genus THALESTRIS Claus. 
1. THALESTRIS FORFICULA Claus. 
1863. Thalestris forficula Claus (1), p. 181, pl. xvii. figs. 7-11. 
Ss . Thomson (1), p. 104, pl. x. figs. 16-21. 
Otago Harbour, between tide-marks; ‘“ dredged abundantly in Dunedin Harbour’ 
(Thomson). 
? 
2. THALESTRIS CILIATA, sp. nov. (Plate XI. figs. 28-33.) 
Robust ; lateral margins of the abdominal segments clothed with short sete (fig. 33). 
Antennules nine-jointed (fig. 28); joints subequal, the length represented by the 
: hal a ie sn Oat pile : 
following formula: —~747-G-7@ 303 4 Posterior foot-jaw forming a suboyate, 
elongated hand, the anterior margin of which bears a continuous fringe of short, 
closely-set sete; terminal unguis stout, falcate, more than half as long as the hand 
(fig. 29). Outer branch of the first pair of feet (fig. 30) with densely pectinated 
margin: one long and stout spine at the apex of the first and one on the middle of the 
second joint; the last joint has two fine marginal sete and one very long, slender 
seta at the apex, between which are two stout falcate claws with hook-like projections at 
their bases: the outer branch has a single seta near the distal extremity of the first joint, 
and at its apex are two ungues, one large and one small. ‘The marginal spines of the 
swimming-feet (fig. 31) are long and slender, and the outer edges of the joints of both 
branches are ciliated. ‘The two laminz of the fifth pair of feet (fig. 32) are of equal 
length; the outer lamina ovate, with finely ciliated margins, four long sete at the apex 
and two on the outer edge; the inner lamina has five principal sete, two marginal and 
three apical, the intervals between which are ciliated. Male unknown. 
Hab. Akaroa Harbour. One specimen only. 
3. THALESTRIS AUSTRALIS, sp. nov. (Plate XII. figs. 1-5.) 
Antennules nine-jointed, slender, the comparative lengths of the joints as in the 
: , LoL ody. s1 Wen en ec hsp Bihon 
following formula: s5-7-3-¢ 6 4 4 6 (fig. 1). Hand of the posterior foot-jaw 
(fig. 2) subovate, bearing near the middle of the anterior margin a single spine-like 
seta, terminal unguis moderately stout and reaching a little beyond the middle of the 
hand. Outer branch of the first pair of feet (fig. 3) shorter than the inner, stout, 
its inner margin bearing rather in front of the middle a stout plumose seta, outer 
margin a large median spine and four apical ungues which successively increase in 
length from first to last; the inner branch has a long, slender, apical unguis and a 
much shorter seta; anterior margins of the larger ungues of both branches finely 
pectinated. Marginal spines of the swimming-feet (fig. 4) long and slender, with 
