314 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
which, on the canal, are two smaller, narrower, and more simple spines ; aperture 
ovate with a projecting, simple margin, not adherent on the side of the body; the 
outer lip with five notches due to the spiral ridges; interior without lirae; canal 
elongated, recurved, nearly closed. Lon. of shell, 29; of last whorl, 24; of aper- 
ture, 8; max. diam. of whorl, 15; including spines, 19 mm. 
U. 8. S. “ Albatross,” station 3397, Gulf of Panama, in 85 fathoms, mud, 
bottom temperature 57°.3 F. U.S. N. Mus. 123,020. 
This shell has the characteristics of the Mediterranean species Zritonalia erina- 
cea Linné, but is smaller, with more slender form and fewer and less strongly 
striated spirals. 
TWPHMIS Montrrort. 
Typhis martyria Datt. 
Plate 15, figure 11. 
Typhis martyria Dall, Proc. U. 8. Nat. Mus., 1902, 24, p. 550. 
U.S. 5. “ Albatross,” station 8013, off the island of San Pedro Martir, Gulf 
of California, in 14 fathoms, sand, bottom temperature 65° F. U.S. N. Mus. 
130,629. 
ANTISTREPTUS Dat. 
Antistreptus Dall, Proc. U. 8S. Nat. Mus., 1902, 24, p. 582; type, A. magellanicus Dall. 
Glypteuthria Strebel, Zool. Jahrb., 1905, 22, heft 6, p. 627; type, Huthria meridion- 
alis K. A. Smith. 
This genus was originally described as sinistral, the type being left-handed in 
its spiral, but the excellent figures given by Strebel in his most useful work on 
the Magellanic fauna show that there are also dextral species. Thus, like Anti- 
planes in the Turritidae, the diagnosis must be revised to include both dextral 
and sinistral species. Strebel shows that in fully adult specimens, both outer and 
inner lips are somewhat thickened, and the outer lip may even show some traces 
of liration, if all the species he refers to Glypteuthria are congeneric. With the 
above reservation, the operculum may be said to be concentric with an apical nu- 
cleus and short ovate form, the inner face with a callous border on the anterior 
margins. It does not, however, show the purpuroid rotatory markings on the 
interior face of the operculum, which characterize Huthria cornea, the type of the 
genus to which Strebel refers Glypteuthria as a subgenus. Only an examination 
of the radula can finally decide the question, but the similarities of the shell, 
nucleus, and operculum are sufficient to render it very probable that Autistreptus 
will eventually form a subordinate group of Huthria. 
