Thomson. — On Neio Zealand Orchestidae. 201 



carpos and propodos ; the 2nd gnathopoda have a broadly 

 ovate propodos, pahn very obhque and with a large triangular 

 tooth near the hinge. The 5th pereiopoda in old males have 

 the meros dilated, and the carpos produced posteriorly into a 

 large rounded plate. Pleopoda diminishing posteriorly ; 3rd 

 pair very small 



Hah. — On sandy beaches, usually just above high-water 

 mark. 



Locality. — Waiwera (north of Auckland) and Otago Har- 

 bour. Not common. 



Probably Filhol's species, 0. dentata, should be assigned 

 to this form, but it is impossible to identify it either by his 

 description or figure. 



4. Orchestia aucklandise, Sp. Bate. 



1862. Orchestia aucklandicB. 



1862. Sp. Bate, Brit. Mus. Cat.', p. 17, pi. la, 



fig. 3. 

 1876. Miers, Cat. N.Z. Crust., p. 121. 

 1881. G. M. Thomson, Trans. N.Z. Inst., vol. 13, 



p. 208. 

 1886. Thomson and Chilton, Trans. N.Z. Inst., 



vol. 18, p. 145. 

 1893. Delia Valle, Gamm. d. G. d. Napoh, p. 505, 



pi. 57, fig. 65. 



1885. Orchestia ornata (?). 



1885. Filhol, Miss, de I'ile Campbell, p. 463, pi. 53, 

 fig. 2. 



"©• 



1885. Talorchestia armata{?). 



1885. Filhol, I.e., p. 460, pi. 53, fig. 3. 



Body robust in large specimens, and in old males with 

 transverse ridges at each segment, giving a corrugated ap- 

 pearance ; length as much as 28 mm. Limbs with few 

 spines. Second antennae projecting nearly straight from the 

 head, about half as long as body, very strong. Coxal plate 

 of 2nd gnathopoda and 1st pereiopoda produced on the pos- 

 terior margin into an acute apophysis. In the males the 

 1st gnathopoda have rugose processes on the carpos and pro- 

 podos, the 2nd gnathopoda are broad and dilated distally, 

 palm nearly transverse, defined by a prominent tooth, and 

 often produced into a flattish tooth about the middle. Pleo- 

 poda normal. 



Hab. — At or below high-water mark, under stones, kelp, 

 &c. ; a powerful species, hopping vigorously. 



Locality. — Kenepuru (/. McMahon), Sumner [C. Chilton), 

 Timaru, Dunedin, Stewart Island. Probablv common. 



