260 Mr. H. E. Strickland on a proposed new genus of Garrulinse. 



gin of the whorls, and the septa being foliated on the edge. I 

 am aware that this opinion is not in conformity with the ideas of 

 many zoologists and comparative anatomists, for ]\Ir. Owen, in 

 the last arrangement of these animals (Todd. Ency. Comp. Anat.), 

 though he places the Spirida with the Dihranchiate Cephalopods, 

 places the Ammonites with Tetrahranchiate next to Nautilus, with 

 the following character, " animal unkno^^^l, presumed to resemble 

 the Nautilus" 



It is \exy desirable that other specimens of this animal should 

 be preserved and brought to Em-ope, that we may have the op- 

 portunity of examining its internal structure, for I can fully sym- 

 pathize with Mr. Cuming in not wishing to have the single spe- 

 cimen which he possesses in any way iujm'ed or cut. 



EXPLANATION OF PLATE XV. 



Fig. 1. The back of the animal. 



Fig. 2. The ventral surface with the anal tube. 



Fig. 3. The side, showing the shell, the dorsal and ventral process of the 



mantle and the anal tube. 

 Fig. 4. Extremity of the body, with the gland and its central aperture as 



contracted in spirits. 

 Fig. 5. The figure copied from Lamarck's sketch, ' Enc. Methodique.' 

 Fig. 6. Animal and shell, copied from De Blainville's ' Manuel.' 

 Fig. 7, The figure copied from Peron and Lesueur's * Atlas.' 



XXXV. — On Cyanocitta, a proposed new genus of Garrvlin^e, and 

 on C. superciliosa, a new species of Blue Jay, hitherto co? founded 

 with C. ultramarina, Bonap. By H. E. Strickland, M.A. 



I LATELY received from Prof. Brandt of St. Petersbm'g a bird 

 from California, labelled " Corvus ultramarinus, Audub., pi. 362. 

 fig. ?>," but which was evidently distinct from the true C. ultra- 

 marinus of the Prince of Canino. The latter species is found in 

 Mexico, and has received the synonymous names of Garrulus sor- 

 didus, Swainson, and Pica Sieberi, Wagler. It is nearly uniform 

 blue above without any supercihary mark, and cinereous below, 

 becoming whitish on the belly and vent. In the bird from Ca- 

 lifornia on the contrary the dorsal feathers are cinereous brown ; 

 above the eye and ear-coverts is a narrow row of white dots ; the 

 cheeks are blackish with a bluish tinge on the lower part ; the 

 chin and throat white, faintly streaked with gray, the sides of 

 each feather being margined with the latter colom-. The blue of 

 the crown and nape descends on each side and forms a collar 

 around the white of the throat. The rest of the lower parts are 

 very light brownish ash-colour. The wings and tail are blue as 

 in C. ultramarina, with which it agrees in general form, except 

 that the wings are much shorter. Total length 1 1 inches ; beak 



