408 MOLLUSCA. 
Looks like a variety of T. rastellum, Hanley (T. Philippi, Anton), 
but is proportionally shorter, the disk is more tumid anteriorly; the 
beaks are farther back ; the concentric lamine of the right valve are 
everywhere more delicate, but on the anterior half they are smoothly 
reflected or almost wanting, so as to have a gloss: the portion where 
the lamine are interrupted, giving the peculiar scale-like appearance, 
is very limited, and confined to this valve, in front of the fold; left valve 
nearly destitute of lamination, shining, with very delicate radiating 
striz, and the oblique grooving on the centre of the disk is very decided. 
The folds are very decided and destitute of lamination on both valves. 
On one specimen, very faint rusty radiations are discerned; on another, 
the beaks are stained bright red, much like 7. crucigera. 
Figures 517, 5174, lateral views of both valves ; 5174, dorsal view 
of the shell. 
TeLLina Lauta (Gould). 
T. parva, solidiuscula, oblonga, inequvalvis, umbonibus ad trientem pos- 
ticalem longitudinis sitis ; latere antico semiovali, margine dorsal 
recto, latere postico triangulart ad apicem truncato ; valvis concentricé 
liratis (iris cum strius obliquis anticé decussatis) albis, roseo quadri- 
radiatis et antice hneis araneosis rosaceis ornatis; flexura incon- 
spicua: cardo dentibus lateralibus carens. 
Tellina lauta, Goutp; Proceed. Boston Soc. Nat. Hist., ii. 252. 
June 1850. Expedition Shells, 79. 
SHELL small, solid, transverse, beaks at the posterior third; anterior 
half semi-elliptical, upper edge straight, rather declining; end rather 
sharply rounded; posterior half triangular; upper edge straight, 
strongly declining; tip truncated; fold indefinite; altitude greatest a 
little in front of beaks; lines of growth finely grooved, decussated by 
slightly oblique lines on the two anterior thirds of the shell; colour 
white, cherry-red at the beaks, and with four broad, conspicuous rays 
of the same colour, the two anterior ones made up of numerous capil- 
lary lines, and these lines are also found on the intermediate white 
spaces; interiorly thickened, tinted cream-colour; the red rays being 
