MONOGRAPH OP TI-IE GENUS STROPHIA. 
11 
Following is Ferussac’s diagnosis in Latin of which I also give a 
translation. 
“P. testa prof unde rimata, oblongo-ovata, solida, Candida, strigis 
sparsis longitudinalibus fuscis, infcerruptis, ornata, confertim costata ; 
costis filiformibus, rectis; spira apice obtuse conica, laevigata, pallide 
cornea; anfractibus novem ad decern planiusculi, angusti, ultimus, antice 
ascendens, basi vix compressus ; apertura semiovalis, intus alba vel 
fulvida, dentibus duobus profundis altero in pariete aperturali, altero 
ad columellam, coarctata ; peristomata, subincrassatum, brevissime re - 
fiexum, marginibus callo junctis, columellari patented’ 
Shell profoundly rimate oblong oval, solid, white, ornamented with 
a few interrupted lines of fuscous, ribs near together, thread like and 
straight. Apex of spire obtuse, very smooth, pale brown. Whirls, 9 
and 10, evenly following one another, narrow, the first ascending in front 
with the last but little compressed. Aperture, semioval, white or a little 
yellow within. Teeth, two, one deep in the fold of the aperture, also 
another on© on the column. Peristome, thick, short and reflexed, 
closely joined to the margin. Column, open. 
On the next page he also speaks of cne tooth which is pro- 
longed into the interior of the shell, his exact words being as follows. 
“ Plus has s’eleie une dent interieure, s’appuynt sur Pavant-dernier 
tour, et se prolongeant assez le©in daris Finterieur de la coquille.” 
I found the shells in the museum collection correctly labeled Pupa 
striatella, Cabo Cruz, Cuba, the label being in the handwriting of Rafael 
Arango, who collected many of the Strophias in the museum. 
In another large lot of shells of this species examined, I find that 
in a number of specimens the inner of the two back teeth is greatly re- 
duced in size sometimes not being longer than the outer. I also find 
that there is a well developed form as given below. 
Form No. 1, smaller than the type, measuring .60 by .30, with 
eight whirls only. Color and form similar to that of the type. There 
are about six per cent of this form. I have a single specimen in my col- 
lection which is in every way similar to typical S. striatella, but which 
differs in having smaller teeth and in being pure white in color, without 
markings. 
