4 1 2 Mr. E. J. Micrs on the Genera 



Suya khasiana, n. sj). 

 (tourteeu examples compared), 

 o. Has a general tinge of ferruginous throughout, which is 

 particularly strong upon the forehead and wing ; 



h. Generally pure white on abdomen and centre of breast ; 



c. Thigh-coverts pure rufous ; 



d. The terminal white spots on the black feathers of the 

 lower part of the neck are larger. 



XXXIX. — Note on the Genera Astacoides and Paranephrops. 

 By Edward J. Miers, Assistant in the Zoological Depart- 

 ment, British Museum. 



In the 'Annals' for last month Professor J. Wood-Mason 

 published a very interesting note "On the Mode in which the 

 Young of the New-Zealand Astacidw attach themselves to the 

 Mother." He states (p. 306) that he observed this peculiar 

 mode of attachment in the young of " a female of Astacoides 

 zealaJidicus,^^ which, he adds in a footnote, ''^ = Paranephrops 

 setosuSj Hutton ;" and, in another footnote, he cites the genus 

 Paranephrops of White as synonymous with Astacoides of 

 Guerin-Meneville. As it appears to me still uncertain to 

 what species Professor Wood-Mason refers in his communi- 

 cation, the following observations may be of interest. 



Guerin-]\Ieneville founded the genus Astacoides^ in April 

 1839*, for a species of crayfish described as occurring very fre- 

 quently in the rivers of Madagascar, to which he applied the 

 name of ^. Goudotii, after its discoverer M. Goudot. This 

 species was noticed almost contemporaneously by M. Milne- 

 Edwardsf, and subsequently described at greater length and 

 well figured by him|, under the name of A. madagascariensis. 

 Of this species, unfortunately, no specimens are in the collection 

 of the British Museum ; but the published descriptions and 

 figure suffice, I think, to show that the genus is well charac- 

 terized by its robust form, powerful anterior legs, with broad 

 hands and short palm, and the position of the antennae, which 

 are inserted heneath the antennules and are furnished with a 

 small or rudimentary basal scale. 



In the genus Paranephrops of White§, as exemplified in 



• Revue Zoologique, ii. p. 109 (1840). 

 t L'Institut, p. 152 (1839). 



X Archives du Museum d'Histoire Naturelle, ii. p. 35, pi. iii. lia-s. 1-6 

 (184p. 



§ Zoological Miscellany, ii. p. 79 (1842). 



