272 bulletin: museum of comparative zoology. 



U. S. S. "Albatross," station 3393, Gulf of Panama, in 1020 fathoms, mud, 

 bottom temperature 36°. 8 F. U. S. N. Mus. 123,101. Also at station 3366, iu 

 1067 fathoms, globigeriua ooze, off Panama, bottom temperature 37° P- ; at station 

 2791, on the S. W. coast of Chile, in 677 fathoms, mud, bottom temperature 38° F. ; 

 and at station 2919, off Cortez Bank, California, iu 984 fathoms, mud, temperature 

 38° F. 



The characteristics of the soft parts were described in the original publication. 

 It may be added that Pleurotoma {Surcula) clara von Martens, from Patagonia, 

 though much smaller, is evidently a member of this group. 



The immense range of the species already indicated will be greatly increased if 

 with the reception of more and better material the following form is definitely 

 fixed as a variety of persimilis, which at present seems doubtful. 



Irenosyrinx (persimilis) var ? leonis Dall. 



Shell small compared with the preceding species, white, of about seven evenly 

 rounded whorls. Compared with the young of I. persimilis of the same size the 

 whorls are more capacious, smoother, not flattened behind nor on the periphery ; 

 the carinations of persimilis are wanting or represented only by an obsolete indi- 

 cation of a ridge ; the canal is wider and more i-ecurved, the anal fasciole shows 

 the markings of tlie sulcus to be wider and not quite so near the suture. Lou. 

 of shell, 50; of last whorl, 38; of aperture, 29; max. diam., 18 mm. 



U. S. S. " Albatross," station 307't, off Sea Lion Rock, coast of Washington, 

 iu 877 fathoms, mud, temperature 36°.6 F. U. S. N. Mus. 110,605. 

 Three specimens were obtained, of which all were more or less eroded. 



Irenosyrinx goodei Dall. 



Plate 19, figure 2. 



Leucosyrinx goodei Dall, Proc. U. S. Nat. Mus., 1889, 12, p. 300, pi. 6, fig. 1. 



U. S. S. "Albatross," station 2788, in 1050 fathoms, mud, bottom temperature 

 36°.9 F. 



Figured for coniparisou with /. persimilis. 



Irenosyrinx ? crebristriata Dall, n. sp. 



Plate 13, figure 10. 



Shell of moderate size, white, covered with a pale yellow pcriostracum ; spire 

 acute, a little shorter than the aperture; whorls rounded, bix in number exclusive 

 of the (lost) nucleus; suture very distinct ; axial sculpture none, except incrc- 

 nirntal lines, unless on the (eroded) apical whorls; siphoiial fasciole wide, ex- 

 tending from the suture to an obscure ridge which forms the shoulder of the 



