158 GAZA. 



G. FISCHERI Dall. PI. 49, fig. 37. 



This shell is of six and a half whorls, and closely resembles Gaza 

 dsedala Watson, except in the following particulars : It is much 

 more depressed proportionally ; the upper margin of the aperture 

 is distinctly depressed below its general plane ; and the radiating 

 lines, almost microscopic in G. d&edala, are in this form impressed 

 in the early whorls near the suture, so as to produce a succession of 

 short ripples, following the recurved lines of growth, which give a 

 fringe-like ornamentation to the suture, at the rate of about five 

 ripples to a millimeter. Nothing like this is visible in any of the 

 specimens of G. superba. The margin of the suture in this form is 

 distinctly appressed, forming a narrow border. The operctilum has 

 about seven whorls. The umbilicus is completely floored over. 

 The soft parts are like those of G. superba, but the tentacles are 

 shorter and stouter, the lateral lobes of the epipodium propor- 

 tionally larger, there is one more lateral process, and the muzzle is 

 not so much expanded laterally at its termination. 



Max. diam. of base, 25'0 ; min. diam., 20'0 ; alt., 16*0 mill. (Dall.) 

 Off Santa Lucia, in 423 fins., gray ooze. 



AVe know so little about the limits of variation in this beautiful 

 group that it is with some doubt that I apply a name to these speci- 

 mens. The difference in form and sculpture, and the distance 

 between Fiji where G. drcdala was collected and the Antilles has 

 seemed to me sufficient warrant in this instance. (Dall.) 



G.fischeri DALL, Bull. Mus. Comp. Zool. xviii, p. 355. (1889.) 

 Subgenus CALLOGAZA Dall. 



Callogaza DALL, Bull. Mus. Comp. Zool. ix, p. 49 (1881) ; I. c. 

 xviii, p. 356. 

 G. WATSONI Dall. PL 49, figs. 25, 26, 27, 28. PI. 48, figs. 11, 12. 



Shell much smaller than the last and but slightly nacreous ; 

 whorls six and a quarter, having the same general form as in the 

 last species, but with a more prominent nucleus ; nucleus small, 

 bulbous, dark brown ; first two and a half whorls glassy, brown 

 spotted, smooth ; subsequently the exterior two-thirds of the upper 

 surface of the whorls sculptured with four or five strong revolving 

 threads ; the space between them and the suture above, with strong, 

 even, flexuously radiating, shining, rounded plications (about eight 

 to a millimeter) which pass obliquely over the revolving threads 

 and appear again on the base as strong regular plications in the 



