OCR Text |
Show 1891.] THE SHELLS OF PERAK. 331 a small white Patula-\\ke shell, which from its fine and regular striation, the silky aspect, and the inner varices must be an immature Streptaxis, but not identical with the above species. It has a diameter of only 3 m m . and shows already 5| whorls. 2. ENNEA(MlCROSTROPHIA)PERAKENSIS,Godw.-AuSt.& G. Nev. (Plate X X X . figs. 1, 1 a.) Ennea perakensis, Godw.-Aust. & G. Nevill, P. Z. S. 1879, p. 735, t lix. fig. 2 (juv.) ; v. Molldff. J. As. Soc. Beng. Iv. 1886, p. 300 ; Ancey, Bull. Soc. Mai. Fr. v. 1888, p. 341. Bukit Pondong (Hungerford). In the remarks on the name of the subgenus to which this species belongs, I have committed the error of writing Martensia, Nevill, instead of Nevillia, Martens. The latter name has been given by Prof, von Martens to a group of Mascarene Enneas (Beitr. Faun. Maur. 1880), but it was preoccupied by H. Adams (P. Z. S. 1868, p. 289) for a genus of the Rissoidse. The group, which comprises a number of Indian, Chinese, and Mascarene species, I have renamed Microstrophia (Jahrb. deutsch. malakoz. Ges. xiv. 1887, p. 22). The Perak species is closely allied to E. stenopylis, Bens. 3. E N N E A (MICROSTROPHIA) HUNGERFORDIANA, V. Molldff. (Plate XXX. figs. 2, 2 a.) Ennea hungerfordiana, v. Molldff. 1. c. p. 301. Bukit Pondong (Hungerford). 4. ENNEA (MICROSTROPHIA) SUBCYLINDRICA, V. Molldff. (Plate XXX. fig. 3.) T. anguste perforata, fere cylindracea, albido-hyalina; spira superne conoideo-convexa, apice obtuso, turn cylindracea. Anfr. 7, convexiusculi, costulis verticalibus subdistantibus-36 anfractupenultimo-regulariter sculpti, ultimus angustior, basi subcompressus, paullum ascendens. Apertura verticalis, rotun-dato- tetragona ; peristoma latiuscule expansum, albo-callosum, superne continuum, subsolutum, sinuatum, margo dexter ad in-sertionem subito attenuatus. Lamella parietalis valida, longe intrans. Alt. 2"75, diam. 1 mm. Hab. ad Bukit Pondong leg. cl. R. Hungerford. Fam. VITRINID^E. 5. VITRINA NUCLEATA, Stol. Vitrina nucleata, Stol. J. As. Soc. Beng. xiii. 1873, p. 23, t. fig. 12, t. ii. figs. 4-6. Helicarion nucleatus, Tryom, Man. Pulm. i. p. 177, t. 41. figs. 49-51. Bukit Pondong (Hungerford) ; Penang (Stoliczka). Tryon places this species in Llelicurion, whilst Stoliczka distinctly states it to be a Vitrina. |