mandible oil-green ; tibiie and hinder part of the tarsi bright yellow ; 

 remainder of the legs and feet yellowish brown. 



Totai length 14 inches ; bill Sį ; vving 7i; tail 2| ; tarsi 2^. 



The 3'oung dilFer in having all the upper surface brown, \vith a 

 triangular spot of white at the tip of all the \ving feathers, and the 

 throat bioadly and conspicuously striated with bro\vn on a \vhite 

 ground. 



Hab. Port Essington. 



ACTITIS ElirUSA. 



All the upper surface pale glossy or bronzy bro\vn, each feather 

 crossed \vith irregular bars of dark brown, bounded on either side by 

 a narrow line of paler brovvn ; wings dark brown ; base and tips of 

 the secondaries \vhite ; primaries very slightly tipped with white ; 

 centrai tail-feathers pale glossy or bronzy brown, vvith a row of irre- 

 gular-shaped spots of dark brown along the margins ; lateral feathers 

 white, crossed by irregular blended bars of dark and pale brown ; 

 under surface •vvhite, w'ith the exception of the sides of the chest, 

 \vhich are pale brown, and the shafts of the feathers of the front of 

 the neck, which are also pale brown. 



Totai length Q\ inches ; bill 1^ ; wing 4^ ; tail 2i ; tarsi 1. 



Hab. Port Essington. 



Remark. — Closely allied to, but smaller than, Actitis hypoleucus. 



Sterna gracilis. 



Crown of the head and back of the neck rich deep black ; all the 

 upper surface, wings and tail silvery grey ; sides of the neck and all 

 the under surface white, with a blush of rose-colour on the breast and 

 centre of the abdomen ; shafts of the primaries -nhite, their outer 

 \vebs slaty black, and a narrow stripe of dark slate-colour along the 

 inner web close to the stem ; irides brownish red ; bill red ; feet 

 orange-red, nails black. 



Totai length \2\ inches ; bill 2 ; \ving 8į ; tail 6 ; tarsi |. 



Hab. The Houtmann's Abrolhos, ofFthe western coast of Australia. 



Remark. — A very elegant species, closely allied to Sterna Dougallii 

 of tlie British Islands. 



2. Short Des^criptions of new or LirTLE-KNowN Decafod Crus- 

 TACEA. By Adam White, F.L.S., Assistant in the Zool. Dep. 

 British Museum. 



Family Maiad^. 

 ScHizoPHRYS, White. 



Carapace oval, depressed, some\vhat attenuated behind ; beeik 

 deeply cloven ; upper orbit deeply cloven, vvith a strong tooth in the 

 middle of the cleft ; under orbit with an elongated appendage on the 

 inside, \vilh t\vo teeth at the end. 



Tail of malc \vith seven joints, the tides nearly parallel. Fore-legs 

 shortest. Fintrcrs \vithout teeth. 



