RHAPHAULUS. 
91 
Annulus Pfr. in Proc. Zool. Soc. 1855. p. 105. Nec Ehrenb. 
— //. et A. Adams Gen. rec. Moll. 11. p. 286. 
— Benson in Ann. and Mag. 2d. ser. XVII. p. 342. 
Rhaphaulus Pfr. in Novih conch. I. p. 75. 
Nomen generi initio datum, monente Cl. Gaskoin (in 
litt.) mutandum fuit, cum genus Diatomacearum jam prius ab 
Ehrenbergio eodem nomine descriptum sit. 
Species nunc notae sunt sequentes : 
1. Rh« bombyciiius Ffp. 
T. impervie umbilicata, oblonga , tenuiuscula , confertim 
striata, serica, rubello-cornea ; spira irregularis, inflata, in co- 
num obtusulum desinens; anfr. 6 convexi, penultimus gibbus, 
latere aperturali subplanatus, ultimus attenuatus, ad suturam 
marginatus, antice ascendens; apertura circularis , basi axin 
subexcedens ; perist. duplex: internum callosum, adnatum, ex- 
ternum late expansuin, reflexiusculum , marginibus superne 
callo junctis: apertura canalis suturalis aperturae testae paral- 
lela. — Operc. luteo-corneum. — Long. 14, diam. 7 i f i mill. 
Ap. intus fere 4 mill. diam. (Coll. Nr. 138.) 
Annulus bomhycinus Pfr . in Proc. Zool. Soc. 1855. p. 105. t. 32. f. 10. 
//. et A. Adams Gen. rec. Moll. 1 1. p. 286. t. 86. f. 3. 
Pfr. Novit. conch. I. p. 62. n. 103. t. 17. f. 12. 13. 
Rhaphaulus bomhycinus Pfr. Novit. conch. I. p. 75. 
jS. Minor, anfr. 5*/*i penultimo magis turgido ; long. 10, diam. vix 6 mill. 
Habitat Sarawak, Borneo. 
2. Rli. Lorraieit Pfr. 
T. perforata, gibboso-oblonga, solida, conferte striata, sub 
epidermide fulvida saturate violacea ; spira irregularis, inflata, 
in conum brevem desinens; anfr. 5 convexi, penultimus gib- 
bus , latere aperturae subplanatus , ultimus attenuatus , antice 
subascendens; apertura circularis, basi axin subexcedens; pe- 
rist. callosum, album, continuum, expansum et reflexiusculum, 
limbo interiore cum exteriore connato; foramen superum par- 
vulum, oblique sursum spectans. - — Operc.? — Long. 15, 
diam. 8 mill. Ap. intus 4 1 / 3 mill. diam. (Mus. Cuming.) 
Anaulus Lorraini Pfr. in Proc. Zool. Soc. 1856. p. 36. (Conf. Bens. 
in Ann. and Mag. 2d. ser. XVII. p. 342.) 
Raphaulus Lorraini Pfr. Novit. conch. I. p. 75. n. 126. t, 20. f. 21.22, 
Habitat Pulo Penang (Dr. Lorrain). 
