Dr. Baird on a new Entomostracous Crustacean. 149 



Description of a new Odontophorxjs. 

 By John Gould, F.R.S., etc. 



Odontophorus melanonotus, Gould. 



Throat, fore part of the neck, and chest rich chestnut-brown ; ab- 

 domen deep blackish-brown, very finely but obscurely freckled with 

 chestnut ; lower part of the abdomen, thighs, under tail-coverts, tail, 

 back of the neck, wings, and rump uniform velvety brownish-black ; 

 legs apparently horn-colour in front, with a wash of orange between 

 the scales ; bill black. 



Total length, 10 inches; bill, -|; wing, 6 ; tail, 2| ; tarsi, 2-1-. 



Hab. Ecuador. 



There do not appear to be any markings about the face, as is usual 

 with the other members of this genus ; but, as my specimen is some- 

 what injured in that part, I am unable to speak positively on this 

 point : the orange colouring, too, between the scales of the legs may 

 or may not be natural ; it is probably due to some extraneous cause. 



This new species, which I have received direct from Ecuador, is 

 in every respect a typical Odontoplwrus, and is very nearly allied to 

 O. niyroyularis, O. erythrops, and O. hyperythrus ; but when the 

 four species are seen together, their specific distinctness is very 

 readily apparent. 



When shall we acquire a knowledge of the whole of this group of 

 birds ? 



Description of a New Entomostracous Crustacean, 

 belonging to the Order Phyllopoda, from South Au- 

 stralia. By Dr. Baird, F.L.S., etc. 



Estheria Birchii. 



The animal appears in all respects to resemble that of the Estheria 

 giyas, except that the eye is placed on a more prominent pedicle. 

 The specimen examined was a female, and full of ova. These were 

 disposed all along the body of the j)arent, were very numerous, and 

 presented a very pretty appearance when seen under the microscope. 

 They are small, round, and grooved, the grooves running in a cir- 

 cular manner like those of a rifle. 



The shell or carapace is of a greenish colour, of an oval shape, 

 and flattened. The umbo is anterior, situated about 2 lines from 

 the margin. The dorsal margin slopes slightly downwards, and is 

 dentated on the edge, in consequence of the ridges, with which its 

 surface is strongly marked, terminating at the external edge in a 

 prolongation or tooth. The ventral margin of the carapace is rounded 

 anteriorly, and terminates posteriorly in one of the strong tooth-like 

 prolongations mentioned above. 



The surface of the shell is marked with 13 ribs or ridges, which 

 near the umbo are slight, but become stronger, well-marked, and 

 prominent as they descend. The surface between the ridges is dif- 

 ferent from any previously described ; it is rather opake, not polished, 

 and presents somewhat the appearance of ground glass. 



