BULIMULUS. 149 



apex is vertically costulate, as in B. motitivagus (Boll. Mus. Zool. ed 

 Anat. Comp. xii, no. 309, p. 18). 



B. IMLEIFORMIS (Moricand). Vol. xi, p. 181. 



This species has the texture and sculpture of the thin, corneous 

 forms of Prologlyptus, and I am now disposed to agree with Ancey 

 (Le Naturaliste, 1901, p. 92), that pileiformis (and perhaps gyrina 

 Val.) are Bulimuli, forming a series in that genus parallel to Oxy- 

 chona in Drynuzus. The apex of B. pileiformis was illustrated in 

 vol. xi, pi. 33, fig. 42. It was Dohrn who first suggested that pilei- 

 formis should be placed in Bulimulus, Jahrb. x, p. 352, 1883. 



Oxychona bifasciata has the apical sculpture of typical Drymceus. 



B. HJEMATOSPIRA Pilsbry. PI. 25, figs. 19, 20, 21. 



Shell rimate, pillar-shaped, the last 4 whorls of about equal diam- 

 eter and while, those above tapering and deepening to a blood-red color ; 

 thin, but moderately strong, opaque, nearly lustreless. Apex obtuse, 

 the earlier 1 whorls convex and sculptured with delicate, spaced and 

 straight longitudinal riblets ; next whorl or two nearly smooth, with 

 merely some series of long granules ; longitudinal ribs gradually ap- 

 pearing ; the white, cylindrical portion of the shell being sculptured 

 with strong, arcuate ribs, narrower than their intervals, and several 

 spiral series of long, narrow, crowded granules. Whorls 8^ to 9, 

 the earlier convex, the later 3 or 4 somewhat flattened. Aperture 

 small, oval, longer than wide, white within ; peristome simple and 

 unexpanded. 



Length 16, diam. above aperture 3; aperture 3 mill. long. 



Length 16.3, diam. above aperture 3; aperture 3 mill. long. 



Length 15, diam. above aperture 3.1 ; aperture 3 mill. long. 



Locality unknown,, probably Peru. Types in coll. A. N. S., No. 

 78,135, and in coll. University of Michigan. 



Bulimulus h&matospira PILS., Proc. Acad. Nat. Sci., Phila., 1900, 

 p. 392. 



This beautiful little Bulimulus would be considered a Peronceus, 

 from its narrow form and calcareous texture, were it not for the 

 apical sculpture, which is like that of N&siotus, Protoglyptus and Or- 

 thotomium. This shows it to be not a Peronceus, but a stock of differ- 

 ent ancestry, parallel to that group, such as I have shown lo exist in 

 various Bulimulid groups. It stands in such a relation to Proto- 



