246 MOLLUSCA FROM THE CRAG. 
Macrra vutearts. Chemn. Conch. Cab., vol. vi, p. 230, pl. 23, fig. 229. 
TRIGONELLA ZONARIA. Da Costa. Brit. Zool., p. 197, pl. 15, fig. 1, 1778. 
— GALLINA. Id. Brit. Zool., p. 199, pl. 14, fig. 6. 
SpIsuLa souipa. Gray. Mag. Nat. Hist., 1837, p. 374. 
Spec. Char. Testd ovato-trigonali, subequilaterali, crassa, leviusculd ; dentibus 
lateralibus perpendiculariter striatis. 
Shell triangularly ovate, slightly inequilateral, thick, nearly smooth ; lateral teeth 
perpendicularly striated. 
Length, \ inch. Height, % inch. 
Locality. Red Crag, Sutton. 
Mam. Crag, Bramerton. 
Clyde Beds. Recent, Mediterranean and British Seas. 
As far as I can ascertain the history of this species, it is of comparatively modern 
origin, although by some mistake it was quoted in my ‘ Catalogue’ as from the Older 
or Coralline Crag, from which deposit I certainly have not a well-determined specimen, 
and those from the succeeding or Red Crag Period are somewhat doubtful. 
I have one characteristic specimen from Bramerton, corresponding precisely with 
the common living shell, but it does not appear to have been abundant even there, as 
it is not enumerated among the Norfolk Shells by Woodward. 
In the recent state, it is generally a littoral species, living buried in the sand, but 
has been found in water as deep as thirty-five fathoms (J/‘dudrew). It is an estuary 
species at the present day. 
8. Macrra ovatus, J. Sowerby. Tab. XXIII, fig. 1, a—d. 
Macrra ovatus. J. Sow. (not Gould.) Min. Conch., t. 160, fig. 5, 1817. 
—  DUBIA. Id. Min. Conch., t. 160, figs. 2,3, 4. 
—  eLurpricA. Brown. Ilust. Conch. Gt. Brit., pl. 15, fig. 6, 1827. 
— — Lovén. Ind. Moll. Scand., p. 45, 1846. 
— — Forb. and Hanl, Mist. Brit. Moll., vol. i, p. 356, pl. 22, fig. 3. 
— soma. Don. Brit. Shells, t. 61, small figure. 
— conGesta? Conrad. Foss. of the Med. Tert., p. 27, pl. 15, fig. 2, 1838. 
—  srriata. Myst. Coq. Foss. de Belg., p. 80, pl. 4, fig. 1 a, 1844. 
SprsuLa ELLIPTIcA. Gray. List Brit. Moll., p. 32, 1851. 
Spec. Char. Testa ellipticd vel ovato-angulatd, subequilaterali, levigatd, vel tenuis- 
sime striata, tumidiusculd ; dentibus lateralibus rugosis ; margine ventrali arcuato. 
Shell elliptical or angularly ovate, nearly equilateral; smooth or very finely striated 
transversely ; slightly tumid; lateral teeth rough or striated; ventral margin curved. 
Length, 2 inches. Height, 1} inch. 
