314 BULLETIN : MUSEUM OF COMPAKATIYE ZOOLOGY, 



which, on the caual, are two smaller, narrower, aud more simple spines ; aperture 

 ovate with a projecting, simple margin, not adherent ou the side of the body ; the 

 outer lip with five notches due to the spiral ridges ; interior without lirae ; caual 

 elongated, recui-ved, nearly closed. Lou. of shell, 29 ; of last whorl, 24 ; of aper- 

 ture, 8 ; max. diam. of whorl, 15 ; including spines, 19 mm. 



U. S. S. " Albatross," station 3397, Gulf of Panama, in S5 fathoms, mud, 

 bottom temperature 57°.3 F. U. S. IS'. Mus. 123,020. 



This shell has the characteristics of the Mediterranean species Tritonalia erina- 

 cea Linne, but is smaller, with more slender form aud fewer aud less strongly 

 striated spirals. 



TYPHIS MONTFORT. 



Typhis martyria Dall. 



Plate 15, figure 11. 



Tijphis martyria Dall, Proc. U. S. Nat. Mus., 1902, 24, p. 550. 



U. S. S. "Albatross," station 3013, off the island of San Pedro Martir, Gulf 

 of California, in 14 fathoms, sand, bottom temperature 65° F. U. S. N. Mus. 

 130,629. 



ANTISTREPTL'S Dall. 



Antistreptus Dall, Proc. U. S. Nat. Mus., 1902, 24, p. 532 ; type, A. magellanicus Dall. 

 Glypteuthna Strebel, Zool. Jahrb., 1905, 22, heft 6, p. 627 ; type, Euthria meridion- 

 alis E. 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 Turritidac, 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 liratiou, if all the species he refers to Gly|)teuthria 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 chanicteri/.c Euthria cornea, the typo of the 

 genus to which Strebel refers Glypteuthria as a subgenus. Only an examinatii)U 

 of the radula can finally decide the question, but tlie similarities of the shell, 

 nucleus, and operculum arc sufficient to render it very probable that Antistreptus 

 will eventually form a subordinate group of Euthria. 



