31(J Scientific Notices^^Zoology, [Oct. 



of the Animal Kingdom, in which he proposed to divide it into 

 two groups, thus : 



1. Aerozoces, Living in air or water; organs of respiration 

 double ; water rarely useful, sometimes injurious ; skeleton com- 

 posed of articulated pieces; head always distinct; organs of 

 locomotion formed of jointed pieces; lateral opposite, parallel, 

 or in pairs, that is to say, symmetrical; nervous system den- 

 droidal, very apparent, composed of amonihform spinal marrow, 

 each knot or joint of which received two trunks of the principal 

 nerves ; reproduction by union of the two sexes, separate on the 

 different individuals. Dioicous. 



2. Hydrozoces, Living in the water, or in a damp air ; organs 

 of respiration simple, or indistinct ; water indispensable to all 

 the individuals in all ages and in all states ; skeleton not inter- 

 rupted or wanting; head sometimes apparent, usually wanting; 

 organs of locomotion never jointed, nor symmetrical, often 

 w^anting; nervous system slightly apparent, often invisible, with- 

 out any spinal marrow, sometimes radiating very rarely with a 

 cephalic ganglia. Reproduction by the union of unesexual 

 bemg in some groups (Dioicous) ; by the union of bisexual in 

 others (Hermaphrodite) ; and without sexual union in others 

 (Agamous). In the last the reproduction is oviparous, gemmi- 

 parous, or fissiparous. 



The 6rst of these groups contains the Vertehrata and Anmdosa 

 of Cuvier, and the second the Mollusca Radiata and zoophites 

 of the same author. Lamx. Bui. Sci. Nat, 1825. 



The division is exactly the same as that proposed by Mr. 

 W. S. Macleay, in his paper on certain Laws which regulate the 

 Arrangement of Insects and Fungi, which was reprinted in the 

 Annaisy vol.vi.p. 324,and abridged into the Bulletin of Sciences 

 for 1824. . 



7. On the Horn of Plenty y a Variety of the Common Garden 



Snail. 



A most beautiful specimen of the monstrosity of the common 

 garden snaW {Helix asperse) called the Cork screw, or Horn of 

 plenty, on account of the whorles being separate from each other, 

 so as exactly to represent the figures of the latter, was disco- 

 vered a few months ago in a gjarden in Devonshire. 



This monstrosity was first described by Born in his descrip- 

 tion of the shell in the Museum of Maria Theresa, where he 

 formed it into a genus under the name of Corni {Born 31us, 

 362, t. 13, f. 10, 11, and Vignette, p. 361), and gave three good 

 figures of the shell. Chemnitz added monstrosmn to the named 

 and copied figure of Born. Shaw, in his Naturalist's Miscellany, 

 figured the shell, and under the name of Cornucopia Helicina 

 (xiv. t 518). Gmehn and Schroeter considered it as a specios 



