166 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Like the Astartes, the creature was very timid and had to be 
watched for hours to secure even a ghmpse of the animal. Its 
color was reddish orange as in Astarte. The anal syphon showing 
the valve only was barely projected beyond the edge of the shell, 
its membrane exceedingly diaphanous. No traces of papillae 
were observed, nor was there an indication of a branchial syphon, 
the mantle being open and devoid of papillae. The foot in some 
positions was short and pointed, directed downward and marked 
with radial striations; or it may be long and narrow and extended 
in front. 
CARDITA NOVANGLIAE Morse. 
I have not yet succeeded in securing a drawing of the expanded 
animal. The mantle near the edge of the shell is pale purple 
blending into light warm gray. The foot is Hght yellow. In 
these respects the species shows its differences from C. horealis 
with which it was confounded and then for a time recognized as 
only a variety of that species. Nothing could be more marked 
than its specific differences. 
GLYCYMERIS SILIQUA Spengler. 
Fig. 24. Length, 84 mm. 
I have often found on various beaches a small shell which I 
at first mistook for the young of Solecurtus gihhus, or the smaller 
species, S. bidens. Neither of these species has as yet been found 
north of Cape Cod. Fragments and even single valves of 
Glycymeris are often picked up. Stimpson recalls it as having 
been found aUve on Nahant Beach after a storm. Sixty-four 
years ago a Portland fisherman gave me a specimen from the 
Georges Bank. I made a drawing of it at the time from which 
the figure here given is a copy. The specimen had been preserved 
in alcohol. The syplions were enclosed in a thick, wrinkled 
brown membrane and evidently could not be drawn within the 
shell. The Hgament was external and massive. Mr. WilHam 
F. Clapp gave me a young specimen of this species from the 
Georges Bank that revealed the true nature of the young which I 
had supposed was the young of Solecurtus. 
The young shell is elongate oval, of a light fawn color. In 
the adult which is covered with a thick, black epidermis the shell 
is thick and chalky white. Fig. 24, a, is 1.5 millimeters in length; 
