130 
MOLLUSCA. 
Shell conical, ovate ; consisting of five deeply defined, rather 
thick, opaque, glossy, flat -sided volutions, covered with longitu- 
dinal, fine, plicated striaj, which terminate about the centre of ' 
the body volution, and are succeeded by three or four spiral 
striae, the lower portion of the body plain ; aperture occupying 
not quite half the length of the body, ovate, subangular below, 
and somewhat acute above ; outer lip rather thin ; columellar 
lip provided with a slight plait.. Length not quite the twenty- 
fourth of an inch ; diameter about half its length. 
“ Similar to Jaminia interstriata, but dlfiering in having the 
volutions more flattened, the plicae more numerous, the colu- 
mellar plait smaller, and in having the spiral striae on the 
body.” 
Found by Professor Macgillivray, among shell sand, on the 
beach near the Broadhill, Aberdeenshire. 
12. Jaminia MARioNiE. 
Odostomia Marionce, Macgillivray, Moll. Ab., p. 156. 
Shell thin, diaphanous, glossy, conical, ovate ; with five 
volutions, which are finely plicated longitudinally, and deli- 
cately striated spirally ; the superior edge of each volution 
in the form of a plaited rib ; aperture ovate, occupying nearly 
the entire length of the body; outer lip slightly thickened, 
not reflexed on the pillar, but ending in a very slight plait 
behind the umbilicus, which is very small ; colour cream- 
white. Length the twenty-fourth of an inch ; diameter half 
its length. 
“ The peculiar markings of this species render it one of the 
most easily recognised of the genus. The tooth is so little 
apparent, were not the peristome incomplete for a short space, 
it might be referred to the genus Rissoa, to which it forms the 
transition.” 
Found by Professor Macgillivray, in shell sand, between the 
estuaries of the Dee and Don. 
13. Jaminia Ann.e. 
Odostoma Annce, Macgillivray, Moll. Ab., p. 157. 
Shell thick, opaque, glossy, white, oblong, turreted; spire 
consisting of four flat-sided volutions, which are divided by a 
shallow sutural line ; body convex, and proportionably large ; 
aperture ovate, nearly a third of the whole length ; outer lip 
thin ; the inner lip somewhat indexed, and terminating in a 
small plait on the columella, opposite the slight umbilicus. 
Length the twenty-fourth of an inch ; diameter a third of its 
length. 
Distinguished from all the others by its peculiar form. 
Found by Miss Anne Macgillivray. 
14. Jaminia oblonga. 
Odostomia oblonga^ Macgillivray, Moll. Ab., p. 157. 
Shell oblong, subcylindrical, gradually tapering to an obtuse 
apex; spire with four flat-sided volutions, divided by a deep 
sutural line, the three superior ones smooth, the lower one, 
together with the body, with numerous, fine, longitudinal ribs ; 
aperture ovate, a fourth of the whole length ; the outer lip 
terminating about the middle of the columella, in a prominent 
plait, running into the interior. Length scarcely a twenty- 
fourth of an inch ; diameter a third of its length. 
“Very similar in form and markings to Rissoa (Pyramis) 
truncata ; but not a third of the size, and having the essential 
character of an Odostomia.” (Jaminia.) 
Genus Natica. — (Page 24.) 
7. Natica helecoides, pi. XIII, f. 24, 25. 
Natica helecoides, Johnstone, Trans. Berwick Club, 1835, p. 
266; Lyell, Phil. Mag., s. 3, v. XVI, p. 365, f. 12; Jeffreys, 
Ann. and Mag. Nat. Hist., VIII, p. 165. 
Shell thin, ovate ; body large, inflated ; spire small, consist- 
ing of three rather tumid volutions, well defined by the sutural 
line, and terminating in a somewhat obtuse apex; aperture 
oblong-ovate, oblique ; outer lip thin, and sharp at the edge ; 
inner lip narrow, with a simple umbilical line behind; whole 
surface covered with a very thin epidermis, of a pale yellowish- 
white. Length nearly three-eighths of an inch ; breadth about 
a quarter. 
Found on the Berwickshire coast, by Dr. Johnstone ; in the 
Frith of Forth, by my friend Dr. Knapp, of Edinburgh, from 
whose specimen I took my figure ; and Mr. Jeffreys found it by 
dredging in Lerwick Sound, Zetland. 
8. Natica nitida, pi. XIII, f. 7, 11. 
Natica mammilla. First Ed., pi. 43, f. 7, 11; Maton and 
Rackett, p. 225 ; Nemta nitida, Donovan, IV, pi. 144 - Mon- 
tagu, Sup., p. 149 ; Natica nitida, Fleming, p. 319. 
Shell subovate, white, very glossy, and smooth ; body very 
large, inflated ; spire small, consisting of four slightly rounded 
volutions, with a very slight sutural line, a little flattened 
towards the margin, terminating in an acute apex; aperture 
a little oblique, semilunar, rounded both above and below; 
outer lip thin at the edge; inner lip narrow; umbilicus striated 
internally, and almost entirely filled by a callus process ; whole 
surface with extremely fine, nearly obsolete strise, which can 
only be seen by the aid of a strong lens. Length upwards of 
three-eighths of an inch ; breadth a quarter. 
Found near Caithness ; the Friths of Forth and Clyde. 
9. Natica rutila. 
Natica rutila, Macgillivray, Moll. Ab., p. 126. 
Shell thick, glossy, subglobose, its breadth more than its 
length; spire short, consisting of three spirally striate, much 
inflated volutions, with a narrow, channelled suture, which is 
margined by a white band; body ventricose; aperture sub- 
ovate, and placed obliquely, its inner side nearly straight; outer 
lip thin; inner lip thickened; umbilicus strongly sulcated; where 
it is somewhat reflexed, but not prominent ; external surface of 
a dull greyish-red, base of a paler hue ; inside reddish-white ; 
operculum semicircular, cornuous, and spirate. 
This species seems intermediate between Natica monilifera, 
and Natica rufa of Montagu. 
Found by Mr. Alexander Murray, at Frazerburgh. 
10. Natica squalida. 
Natica squalida, Macgillivray, Moll. Ab., p. 128. 
Shell thick, subglobose ; body large ; spire small, depressed, 
with two and a half inflated, spirally striated volutions, termi- 
nating in an obtuse apex, defined by a subcanaliculate suture ; 
aperture ovate, somewhat angulated below, oblique, and double 
the length of the spire ; inner lip reflected over the columella, 
but very thin, and leaving rather a deep fissure in the umbilical 
space, on which there is no callosity ; colour yellowish-white. 
Length three and a half twelfths of an inch ; breadth three- 
twelfths. 
This species “ bears a great aflinity to Natica helicoides, of 
