346 
PLECOTREMA §. 2. 
conoidea, apice mucronata; anfr. 8, planiusculis, infra suturam 
sulco profundo et lato exaratis, ultimo basi attenuate, pone 
aperturam valde cristato; apertura subobliqua, angusta; plicis 
parietalibus 2, superiore tuberculiformi, altera bipartita; plica 
columellari compressa, subhorizontali; perist. simplici, margi- 
nibus callo crasso junctis, dextro intus incrassato, tridentato, 
dente superiore minuto, columellari dilatato, patente. — Long. 6, 
diam. 3*^ mill.; apert. 2 mill. longa.“ (A.) 
Plecotrema exigua H. Adams in Proc. Zool. Soc. 1867. p. 307. t. 19. f. 15. 
Habitat „Trou d’Eaux Douces“ insulae Mauritii (G. Nevill). 
* 
13. striata (Laimodonta) Nuttall. (Coll. 6.) I. 104. II. 79. — 
Pease in Proc. Zool. Soc. 1871. p. 469*). — Patel Cat. p. 114. — 
Schmeltz in Mus. God. cat. V. p. 87. — Auricula striata Phil. — 
Pedipes inaequalis C. B. Adams. — Plecotrema inaequalis H. A. 
Adams, Patel Cat. p. 114. — Ellohium striatum H. 8f A. Adams. — 
Var. /?: Plecotrema lahrella H. 8f A. Adams . — Lirator multisulcatus 
Beck ? — Ins. Sandwich. 
i4. PI. rapax Dohrn. 
„ T. imperforata, ovato - conica , tenuiuscula, regulariter 
sulcata, nitidula, corneo - hyalina ; spira conica obtusiuscula; 
sutura marginata; anfr. 6 — 7 planiusculi, ultimus spiram supe- 
rans, basi attenuatus, pone aperturam cristatus; apertura obli- 
qua; plicae parietales 2, superior dentiformis, peroblique de- 
scendens, inferior extus breviter bifida, lamelliformis, transversa; 
columellaris mediocris, ascendens; peristomium rectum, margi- 
nibus callo lato junctis, dextro bidentato, columellari breviter 
reflexo. — Long. 6, lat. 3; ap. long. 3, lat. 2 mill.“ (D. — 
Coll. Nr. 7.) 
Plecotrema rapax Dohrn in Malak. Bl. VI. 1859. p. 204. 
— Patel Catal. p. 114. 
*) „T. crassa, imperforata, globoso-conica, sabovata, nigra, spiraliter 
impresse striata, striis rare inaequaliter distantibus, interstitiis planis, striis 
remote hispidulis; spira conica, mucronata, convexiuscula; sutura linearis; 
anfr. 7, ultimus tumidiusculus, i j 2 longitudinis testae fere aequans, basi vix 
attenuatus; apertura fere verticalis, oblonga, postice acuta, vix contracta, 
basi rotundata, nigricans vel cinereo-nigrescens ; plicae parietales 2, lamelli- 
formes, superior perobliqua, altera extus bifida, valde compressa, elevata, 
profunde intrans ; plica columellaris valida, transversa; peristoma rectum, 
acutum, marginibus plerumque callo lato tenuissimo junctis, dextro intus, 
dimidio anteriore et circa basin prope marginem calloso, bidentato; columella 
extus ad marginem vix elevato-laminata , infra juxta regionem umbilicalem 
vix crispata. — Diam. 8X5 vel 5X3 mill. Oahu.“ 
