NO. 1136. OBSERVAT/OXS OX THE ASTACIDJi—FAXOX. G60 



Aatacua oaldwelli Bate, Proc. Zool. 8oc. LoudoQ, 1865, p. 469, pi. xxvii. 

 Astacoidcs madagascarieiisis Hixi.ey, Proc. Zool. Soc. London, 1878, p. 759, lig. 

 2 B ; p. 773, fig. 7 ; The Crayfish, p. 251, tig. 65, 1880. 



Habitat. — Madagascar. 



The only specimen of this species that I have seen is Gueriii's type, 

 in the Museum of the Academy of Natural Sciences of Phihidelphia 

 (No. IMK), Gucrin Coll.). The color in life, according to Goudot, is 

 brownish green. 



ASTACOPSIS Huxley. 



AstmojiHis Huxley, Proc. Zool. Soc. London, 1878, p. 764. 

 Type, Asiacus franklinii Gray. 



Rostrum triangular, concave above, margins toothed. Antenual 

 scale of moderate width, tai)ering off" to an apical spine. Anterior 

 ])rocess of epistome long triangular. Superior border of hand dentate. 

 Carapace and abdomen more or less tuberculous or spinous, at least in 

 mature individuals. Form homaroid. Twenty-one gills on each side 

 of the trunk, disposed as shown in the following formula: 



AliTHUOBRANCHlyE. 

 SOiMITE. POUOBKAXCHI^. ^ PlEUROBRANCHI.E. 



Anterior. Posterior. 



Vll. . . . O(epc) . . . . . . . . . . = O(epr) 



VIII. ...1....1....0....0 =2 



IX. ... 1 .... 1 .... 1 .... =3 



X. ... 1 .... 1 .... 1 .... =3 



XI. ... 1 .... 1 .... 1 .... 1 =4 



XII. ...1....1....1....1 =4 



XIII. ...1....1....1....1 =4 



XIV. ...0....()....0....1 =1 



64-t'pr + 6 + 5 + 4 = 21 + cpr 



Habitat. — Australia and Tasmania. 



ASTACOPSIS FRANKLINII Gray. 



Astacus frunkUnii Guay, Eyre's .Journals of Expeditious of Di.scovery into Cen- 

 tral Australia, I, p. 409, pi. iii, tig. 1, 1845; liist Crust. Brit. Mus., p. 72, 

 1847 (no description). 

 AstacKS frankUnii Ericuson, Arch. f. Natargesch., 12ter Jahrg., I, ]}. 375, 1846 

 (after Gray). 



Aalaropsis frankUnii Huxley, Proc. Zool. Soc. London, 1878, j). 764, tigs. 4,5. 



Aniampsis frankUnii Haswell, Cat. Australian Stalk- and Sessile-eyed Crustacea, 

 p. 176, 1882 (alter Gray). 



Habitat. — Tasmania. One specimen (male), 96 mm. long, in Museum 

 of Comparative Zoology (No. 1140), from Hobart Town, Mr. Kobertson. 

 The angles of the abdominal pleur.e in this specimen tend to develop 

 spiny i)oiuts. 



Astacopfiis frankUnii is similar in external appearance to the .Mada- 

 gascar craytish {Astacoidcs niadaiiascariensis). The latter, however, as 

 has been shown by Iluxley, has the number of gills reduced to twenty- 

 four, against forty-two in the former. A. frankUnii appears to be rep- 



