Chilton. — New Zealand Sand-hoppers. 



299 



l-k—4- 



Occunence.- — On sandy beaches at numerous points on the New Zealand 

 coasts, and at Chatham Islands.* 



Remarks. — This species is smaller 

 and less common than T. quoyana. 

 but is found at suitable spots all round 

 the coast. Mr. Thomson says that 

 it occurs " on sandy beaches and 

 sandhills, usually at some distance 

 from the sea." Most of my own 

 specimens, however, have been taken 

 near high-water mark ; at Moeraki, 

 on the east coast of Otago, I found it 

 burrowing in the sand in places similar 

 to those where T. quoyana is usually 

 found. It closely resembles that 

 species in colour, but may be readily 

 distinguished by the short antenna 

 and the greatly swollen body. 



In young males the second gnatho- 

 poda have the propod small and the 

 palm regularly rounded as in some 

 species of Orchestia ; in older males 

 the form differs very much at various 

 stages, and it is possible there may 

 be more than one adult form, though 

 I think not. Fig. 13 is taken from a 

 large specimen collected at Moeraki ; 

 other specimens have the palm more 

 like that shown by Stebbing (1887, 

 pi. 39, fig. A, gn. 2) ; it has the basal 

 joint very long, and its anterior surface channelled to fit the large propod 

 when reflexed. 



Fig. 13. — Fourth peraeopod of 

 adult male. 



Taiorchestia telluris (Bate). (Figs. 14 to 18.) 



Orchestia telluris Bate, 1862, p. 20, pi. 3, fig. 6 ; pi. 4, fig. 4 : G. M. 

 Thomson, 1899, p. 200. Taiorchestia telluris Stebbing, 1906, 

 p. 551 (with synonymy). 



Specific Diagnosis. — Body rather compressed. Antenna 1 reaching 

 rather beyond penultimate joint of peduncle of antenna 2. Antenna 2 

 variable, in first form short, about as long as head and first segment of 

 peraeon, flagellum rather shorter than peduncle; in second form longer, 

 especially in adult males. Gnathopod 1 in male with carpus longer than 

 propod and bearing a small rounded pellucid lobe near middle of its free 

 hind margin, propod with a rather larger lobe at distal angle forming 

 a transverse palm ; whole limb rather spinose. Gnathopod 1 in female 

 similar but without the lobes, propod narrowing distally. Gnathopod 2 

 in the male of two forms. In the first form (fig. 16) with propod large, oval, 

 palm oblique, spinose, concave between the base of the finger and an acute 



* In Mr. G. M. Thomson's collection are one large female and three smaller ones 

 from Pirates' Bay, Tasmania, which appear to belong to this species, but without a 

 male the identification is somewhat uncertain. 



