1896.] NATURAL SCIENCES OF PHILADELPHIA. 445 



the species as the last mentioned gentleman had over two years ago 

 announced his intention of describing it, but has so far, I believe, 

 published nothing referring to it. As a distinct form from any pre- 

 viously reported from these islands, I have thought best to briefly 

 indicate it. 

 Bulimulus (NsBsiotus) chemnitzioides Forbes. Plate XVII, fig. 4. 



Bulimus chemttUzioides Fbs., P. Z. S., 1850, p. 55, pi- ix, fig. 6; Pfr., Mon. 

 Hel. Viv., Ill, p. 303, 1853; Kiister in Chemn. Conch. Cab., ed. ii, Bulimus 

 No. 113, pi. 31, figs. 21-23. 



Bulimus {N(esioius) chemnitzioides Pfr., Vers. Malak. Blatt., p. 160, 1855, _^ 



Bulimulus ( Omphalostyda) chemnitzioides H. & A. Ads., Gen. Rec. Moll., ii, 

 p. 161, 1855. 



Bulimulus {Pleuropyrgus) chemnitzioides Martens in Albers Heliceen, ed. ii, 

 p. 221, 1860; Pfr., Norn. Hel. Viv., p. 254, 1881 ; Reibisch, Isis, 1892, p. 12, t. 

 ii, fitr. 4; Stearns, Proc. U. S. Nat. Mus., XVI, p. 381, 1893. 



Bulimulus [Fleuropyrgus) lima Reibisch, Isis, 1892, p. 13, t. ii, fig. 5. 



On Chatham Island, at 300-600 feet elevation, with B. perspec- 

 tivus Pfr., on rocks and under stones, Wolf; on the leaves of plants 

 at 1,600 feet elevation, near the southwest end of Chatham Island, 

 Dr. Baur ; also Kellett, Habel and the U. S. Fish Commission. 



The younger specimens named lima by Reibisch though appar- 

 ently differing somewhat in form, appear to grade directly into the 

 others. This species sometimes shows a small but distinct parietal 

 tooth or callosity, but this is quite exceptional. 



Jaw almost membranous, thin, light horn-colored, slightly arcu- 

 ate, of almost equal height throughout, low, wide, with blunt ends 

 and margins bluntly denticulated by the broad ends of the ribs ; 

 anterior surface with about 20 broad, flat ribs, reinforced at their 

 outer edges and separated by very narrow interstices. 



Radula long and narrow, formula about 1 ; rhachidian 



22+8-8+22 



tooth tricuspid as in the other species ; perfect laterals about eight 

 on each side, bicuspid ; marginals low, wide, with one inner long 

 bicuspid cutting point and a shorter wide outer cutting edge broken 

 up into three or more denticles. 



The specimens examined anatomically were so much shrunken 

 by the alcohol and had genitalia so little developed that they could 

 not be satisfactorily dissected. This species is connected so closely 

 by such forms as B. Relbischi and B. rugiferus with the typical 

 Ncesioti that it is obvious that they should be referred to the same 

 section of the genus. The nepionic whorls are usually decorticated 

 and smooth, but when perfect, show the usual transverse ribbing. 



