302 CRAYFISHES. 
I doubt if this is the specimen figured by Milne Edwards: he gives as the 
length of the body, two inches; the figure, which is said to be life size, is 56 mm. 
long. 
Dr. Giuseppe Nobili! also has examined the same cotype belonging to the 
Paris Museum and is convinced that it belongs to the same species as a male 
specimen, 66 mm. long, in the Museum of Natural History of Genoa, said to 
have been collected by D’Albertis in 1872 on the little island of Sorong in the 
Strait of Galevo, northwestern coast of New Guinea. Perhaps a misplacement of 
labels has occurred in this case; the extraordinary distribution of this species 
implied by the nominal locality label accompanying the Genoa specimen, as well 
as the nature of the islet of Sorong, make it probable that the specimen was in 
reality secured at Sydney, Australia, where D’Albertis collected in 1873. 
Astacopsis australasiensis may turn out to be nothing but an immature 
stage of A. spinifera. 
ASTACONEPHROPS ALBERTISIE: Nobili. 
Astaconephrops albertisii Nosit1, Annali Mus. Civ. Storia Nat. Genova, 1899, 40, p. 244; Bolletino dei 
Musei di Zoologia ed Anatomia Comparata di Torino, June 9, 1903, 18, p. 1. 
The genus Astaconephrops, with its one species albertisii, based on a single 
female specimen in the Museum of Genoa which is said to have come from 
Katau on the southern coast of New Guinea, needs further elucidation. Accord- 
ing to Nobili the margins of the rostrum (which in a general way resembles the 
rostrum of Paranephrops) are continued back, in the shape of two keels, over 
the carapace to the cervical groove; the abdominal segments are produced into 
points laterally; the inner branch of the last pair of abdominal appendages is 
furnished with a rib or keel on the dorsal face, terminating in a spine near the 
centre of the branch; the chelae are long and slender and on account of the 
elevation of the middle of the two faces appear subprismatical; the carpus is 
cylindrical, or rather depressed, and armed on the inner side with a sharp spine 
concealed in a large tuft of hairs; the inner margin of the palm is furnished with 
minute teeth, all the rest of the palm being smooth; the fingers are unarmed, 
but provided with hairs along their cutting edges. 
From the description of this animal given by Nobili one would infer a com- 
bination of the characters of Nephrops, Paranephrops and Cheraps. The 
1 Contribuzioni alla Conoscenza della Fauna Carcinologica della Papuasia, delle Molluche e dell’ 
Australia. Annali del Mus. Civ. Storia Nat. Genova, 1899, 40, p. 246. 
