1905.] NATURAL SCIENCES OF PHILADELPHIA. 783 



HAWAIIAN SPECIES OF ENDODONTA AND OPEAS. 



BY H. A. PILSBRY AND E. G. VANATTA. 



Some five species of the typical group of Endodonts have been de- 

 scribed from these islands. One of these, E. binaria (Pfr.), is unlike the 

 others in wanting palatal teeth. Two, E. laminata (Pse.) and E. api- 

 culata Anc, are roughly sculptured, and two, E. lamellosa (Fer.) and E. 

 fricki (Pfr.), are smoothish, marked with weak growth-lines only. The 

 present paper deals with the smooth species. According to Mr. 

 Thaanum, these snails are found among dead leaves on the ground, 

 never on logs or stumps. The round-whorl ed, ribbed Endodonts, such 

 as E. ludijera and E.thaanumi, live on dead stumps and logs, and under 

 the bark of dead trees, but also among fallen leaves. E. lanaiensis was 

 found at Mapulehu, Molokai, under bark and on stumps. 



Endodonta lamellosa (Fer.). PI. XLIII, figs. 7, 8. 



Helix lamellosa Fer., Histoire, etc., I, p. 369, PI. 51A, fig. 3. 



The locality of the original specimens of this species is not known. 

 Specimens labelled Kauai in the collection of the Academy agree best 

 with the original figm"es, one of these being illustrated on our plate. 

 This shell measures, alt. 3.5, diam. 9.5 mm., and has 6^ whorls. The 

 umbilicus is rounded at the bottom, being at first thimble-shaped with 

 sub vertical walls; then the suture diverges more, leaving a narrow, fiat 

 spiral terrace which descends about 1 to If turns, the side wall remain- 

 ing vertical except on the last half whorl where it slopes outward a 

 little, as shown in fig. 8. The keel does not project at the suture on 

 the upper siu-face, though visible there. The upper parietal lamella 

 is distinctly bifid. 



Somewhat smaller shells have been examined from Waianae, Oahu 

 (D. D. Baldwin), and a small race also occurs at Mt. Lihau, near 

 Lahaina, West Maui (D. Thaanum). 



Mr. Sykes has placed E. fricki (Pfr.) under E. lamellosa as a synonym, 

 but without stating that he had seen the type. As originally described 

 and figured, it differs from lamellosa by the absence of a columellar 

 lamella. This is, next to the parietal, the most constant of the laminae 

 in Endodonta, and its absence, if confirmed by other specimens and not 



