MOLLUSCA OF INDIA, 201 
Rhaphaulus chrysalis, Benson, A. M. N. H. 1859, vol. iv. p. 94 
(desc. animal and operculum); Pfr. Mon. Pneum. vol. il. p. 92; 
Sowerby, Thes. Conch. pl. cclxv. figs. 6,7; Hanley, Conch. Ind. 
Pp. doy plscxxminy fet 7, 
Rhaphaulus chrysalis, Theob. Supp. Cat. p. 40; Nevill, Hand-list, 
p. 301. 
Original description :—‘ C. testa wmbilicata, distorto-ovata, solida, 
striatula et punctato-malleata, fusco-carnea ; spira irrequlariter ovata, 
apice conoidea, acutiuscula ; sutura levi; anfract. 6, convexiusculis, 
penultimo latere aperturali planulato, ultimo augustiore ; apertura 
vertical, circulari ; perist. crasso, dilatato, patente, reflewo, margine 
supero linea horizontali adnato.  Operculum ? Long. 16, 
diam. 9 mill. Hab. Ava.” 
Stoliczka, in 1871, described the animal of this species as fol- 
lows :—‘“‘I have only obtained a single live specimen at the Farm 
Caves near Moulmain. ‘The animal was pale greyish white, with a 
slight fleshy tinge; tentacles rather long and pink; rostrum stout, 
the red oral parts shining through at its base; the frontal edge is 
slightly lobed. There is a regular canal leading from the pulmo- 
nary cavity backwards, then piercing the mantle and entering the 
tube, which runs again forward on the internal side of the last whorl 
below the suture, until it terminates in the external apertural tube. 
The form of this tube is different from that of Pupina or Alyceus, 
but it is very much the same as in Streptaulus.” 
RHAPHAULTS ASSAMICA, nN. sp. (Plate XLVII. figs. 2, 2 a, 2 6.) 
Locality. Brahmakhund (M. J. Ogle). 
Shell elongately cylindrical, solid, rather tumid, flattened on the 
frontal surface of the penultimate whorl; sculpture regularly 
closely costulate ; colour dull umber-brown ; suture moderately im- 
pressed ; whorls 6, penultimate the largest with sides flat, the next 
much smaller and convex ;’ aperture perpendicular; peristome very 
thick, double, both continuous, but the outer only has a thin callus 
on the whorl. 
The sutural tube has its origin on the upper outer margin close 
upon the outer lip, is colourless, and turns sharp downwards behind 
it, extending to nearly the height of the last whorl. This peristo- 
mial tube is not a tube in the strict sense of the term, but in section 
is semicircular, an arch outside resting upon the body-whorl, which 
forms the diameter. An inner sutural tube follows the suture 
backwards; it opens internally 3 mm. within the aperture, it is in- 
distinctly shown on the exterior, but the lines of costulation extend 
over it, differing thus from what is seen in the similar tube in 
Streptaulus blanfordi, Bs. 
Operculum horny, of 8 close-wound whorls; origin central. 
Largest. Size: major diam. 8°3, diam. ap. 4:0, alt. axis 16°75 mm. 
- Os 546 Gs OG) =. 0-66 inch. 
Smallest. = 0'0, is 38, Salas mm. 
ye O20. 22 ae ORO eS 0°52 inch. 
