946 PLECOTREMA $. 2. 
conoidea, apice mucronata; anfr. 8, planiusculis, infra suturam 
suleo profundo et lato exaratis, ultimo basi attenuato, 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 *). — JPüátel Cat. p. 114. — 
Schneltz in Mus. God. cat. V. p. 87. — Auricula striata. Phil. — 
Pedipes inaequalis C. B. Adams. —  Plecotrema inaequalis H. & A. 
Adams, Pütel Cat. p. 114. — Ellobium striatum .H. & A. Adams. — 
Var. B: Plecotrema labrella H. & A. Adams. — Lirator multisulcatus 
Beck? — ns. Sandwich. 
14. Pl. rapax Dohrn. 
, T. imperforata, ovato-conica, tenuiuscula, regulariter 
suleata, nitidula, corneo-hyalina; spira conica obtusiuscula; 
sutura marginata; anfr. 6—7 planiuseuli, ultimus spiram supe- 
rans, basi attenuatus, pone aperturam cristatus; apertura obli- 
qua; plieae 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. 1.) 
Plecotrema rapax JDohrn in Malak. Bl. VI. 1859. p. 204. 
— —-  JPütel Catal. p. 114. 
*) ,'T. crassa, imperforata, globoso-conica, subovata, nigra, spiraliter 
impresse striata, striis rare inaequaliter distantibus, interstitiis planis, striis 
remote hispidulis; spira conica, mucronata, convexiuscula; sutura linearis ; 
anfr. 7, ultimus tumidiusculus, !/; longitudinis testae fere aequans, basi vix 
attenuatus; apertura fere verticalis, oblonga, postice acuta, vix contracta, 
basi rotundata, nigricans vel einereo-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 cirea basin prope marginem calloso, bidentato; columella 
extus ad marginem vix elevato-laminata, infra juxta regionem umbilicalem 
vix erispata. — Diam. 8 2«/,5 vel 5 2&3 mill. Oahu.* 
