130 



MOLLUSCA. 



Shell conical, ovate; consisting of five deeply defined, rather 

 thick, opaque, glossy, flat-sided volutions, covered with longitu- 

 dinal, fine, plicated strise, which terminate about the centre of 

 the body volution, and are succeeded by three or four spiral 

 stria;, 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 ; eolumellar 

 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 differing in having the 

 volutions more flattened, the plica; more numerous, the eolu- 

 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 Marions. 



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 rellexed 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*. 



Odostoma Anntre, 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 (Pyrainis) 

 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. 3G5, 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 edo-e ; 

 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 ; Nerila 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 stria;, 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 rellexed, 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 angulatcd 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 affinity to Natica helicoides, of 



