CEPHALOPOUA FE03I THE HOKKAIUo. 37 



Shell discuklal, thick; whorls rüuiicl in the early stage; 

 subquaclrate in the adult, higher than broad, and Ijroadest near 

 the umbilical edge. Ventral side uniforniely rounded. Umbilicus 

 moderate in size, showing about three fifths of the circumference 

 of each volution and surrounded by a perpendicular wall. Surface 

 ornamented with very fine striœ, and also very feeble and narrow 

 farrows. The striœ are so fine that we can hardly detect them 

 without the aid of a magnifier ; they rise at the umbilical suture, 

 bend abruptly forward at the umbilical edge and then traverse the 

 sides without any further flexion. The faint furrows on the body 

 cluiml)er of the largest specimen are narrow, parallel to the stria*, 

 and arranged at intervals of al)out half a centimeter from 

 one anotlier. The sutui'e line is very complicated, but shows on 

 the whole the character of the group of G. Sacya Forbes. 

 There are six or seven saddles on each side ; the external, the two 

 lateral and the first auxiliary saddles are symmetrically bifid ; the 

 lii'st lateral lol)e is the deepest, slightly surpassing the external lobe 

 in depth and also symmetrically Ijipartite. Auxiliary saddles and 

 lobes hang obliquely toward the uml)ilical suture. 



The fine strite of growth and numerous feeble furrows of the 

 present form make it seem at first sight to be allied to Pseudo- 

 l^hylliles indra Stoliczka' sp., to which its general aspect also 

 closely conforms. The most characteristic feature of Pseudo- 

 lihylliics, however, lies in the suture line (jf the young shell, which 

 shows tripartite saddles with plylloid termination, while in 

 individuals of an advanced stage both branches of the external 

 saddle become unequal in size. The Indian form is, therefore, 

 not only difierent from the Japanese, but also from all other 



1) Stoliczka: 1. c p. 112, PL LVIII, fig. 2.— Kossmat: 1. c. p. 41 (J37), PI. II. (XVJ.), 

 figs. üa,b, 9a,b; PI. III. (XVII.), figs. 6, 7a,b; PI. IV. (XVIII.), fig. 3. 



