208 
HELICINA §. 18. 
155. IK. denticulate* Pfr. 
T. globoso-conica , solidula, oblique striata, minutissime 
decussata, rugis antrorsum descendentibus distantioribus sculpta, 
parum nitida, alba, superne late flavo-fasciata ; spira convexo- 
conica, acuta; sutura eleganter denticulata; anfr. 5 4 / 2 vix con- 
vexiusculi , ultimus peripheria subangulatus, basi parum con- 
yexus ; columella bre viter arcuata , antrorsum dentata, superne 
rim a brevi notata, retrorsum in callum tenuem abiens ; aper- 
tura subtriangulari-semiovalis ; perist. album, angulatim patens, 
medio in rostrum triangulare productum. — Operc. ? — Diarn. 
maj. c. rostro 13, min. fere 11, alt. 9 mill. (Mus. Cuming.) 
Helicina denticulata Pfr. in Proc. Zool. Soc. 1855. p. 103. 
— - — Pfr. Novit. conch. I. p. 84. n. 144. t. 23. f. 9. 10. 
Habitat Honduras. 
* 
156. gonoefaila Pfr. (Coll. 113. — Gray Phan. p. 
283. — Pachystoma Ad. Gen. p. 303.) .... Mon. p. 389. 
157. If. grsitio§a Pfr. 
T. subgloboso-turbinata, tenuiuscula, striatula, striolis spi- 
ralibus obsoletissime notata, nitida, pellucida, fuscescenti-rubra 
vel lutea ; spira conoidea , acutiuscula ; anfr. 5 convexiusculi, 
ultimus subcarinatus, antice rotundatus ; columella subrecedens, 
alba, callum emittens albidum; apertura obliqua, subtriangu- 
lari-semicircularis ; perist. undique breviter expansum. — Operc. 
tenue, solidulum, carneum. — Diam. maj. 9, min. alt. 
fere 6 mill. (Mus. Cuming.) 
Helicina gratiosa Pfr. in Proc. Zool. Soc. 1856. p. 385. Malak. Bl. 
1856. p. 245. 
Habitat „ Admiralty Islands." 
% 
158. gcopulorum JVKor. (Coll. ill. — Ch. ed. nov. 
p. 72. t. 10. f. 21 — 23. — Pfr. in Mai. Bl. 1856. 
p. 148. — H. marmorea Vel. — H. elongata Pfr. 
Mon. n. 114. Nec Orb . — Gray Phan. p. 283.) . Mon. p. 389. 
159. II. pyramidally Sowerby. 
T. trochiformis, tenuis, sublaevigata, lutea ; spira subcon- 
cavo-conoidea, mucronata; anfr. 7% planiusculi, medii tenui- 
ter spiraliter striati, ultimus subcarinatus; columella verticalis, 
complanata, callum tenuissimum retrorsum emittens; apertura 
diagonalis, subquadrangulari-ovalis ; perist. tenue, breviter ex- 
pansum, margine dextro leviter sinuato, basali versus colu- 
