348 
PLECOTREMA §. 2—4. 
nitens, fusco-rubella ; spira mucronata, apice acuminata; anfr. 
8 — 8V 2 parum convexi, vix discreti, ultimus spira longior, 
basi attenuatus ; apertura oblonga , denticulis 4 coarctata : 2 
parietales quorum superus punctiformis ; 1 columellaris , com- 
pressus; 1 saepe bituberculatus in peristomatis margine dextro; 
perist. rectum, crassum, marginibus callo concolore junctis, 
columellari mediocriter dilatato, patente. — Long. diam. 
5 1 / 2 mill. Apert. 5 mill, longa, 3 lata. 44 (M.) 
Plecotrema Siamensis Morelet Series conch. IV. 1875. p. 273. t. 13. f. 6. 
Habitat Siam (Bocourt). 
* 
20. imperforata H. & A. Adams. I. 106. II. 81. — Ins. Negros 
Philippinarum. 
21 . PI. hirsuta Garrett, f 
„Testa imperforata, solida, cornea; spira acuta, convexo- 
conica, circa dimidium totius longitudinis formans; anfr. 8 — 9 
(embryonales 2), piano -convexi, ultimus tumidus, transverse 
sulcatus ; sulci profundi , liras interjacentes fere aequantes, 
16 — 18 in anfr. ultimo, pilis brevibus curvatis muniti; sutura 
obsolete impressa; apertura subverticalis , angusta, contracta, 
quinquelobata , albida; perist. varice externo forti munitum, 
margine interiore labiatum, infra rotundatum, supra sinuosum, 
dentibus 2 tubercularibus validis in medio labii interioris mu- 
nitum; columella expansa, plica compressa, obliqua munita; 
regio parietalis tenuiter callosa, bidentata: dente superiore 
parvo, tuberculari, denti labiali supero opposito, inferiore 
compresso, bifurcato, in aperturam intrante. — Long. 7, diam. 
4,5 mill. 44 (Garr. angl.) 
Plecotrema hirsuta Garr. in Amer. journ. conch. VII. 1872. p. 219. t. 19. f. 1. 
— — Schmeltz in Mus. God. cat. V. p. 87. 
Habitat in insulis Viti. 
§. 3 . 
22. Cub en sis Pfr. (Coll. 11.) I. 107. II. 81. — Cardenas insulae Cuba. 
§• 4 . 
23 . PI. marginalis (Auricula) Grateloup. f 
„ Testa imperforata, ovato-ventricosa, solida, laevigata; 
spira obtuse conica, apice mamillato; anfractibus 7 marginatis, 
