169 
is covered with a thin epidermis. It is always destitute of varices 
and of umbilicus^ and hears the same relation to Pyrula that Fas- 
ciolaria does to Fusus. Indeed we would have more readily ac- 
quiesced in referring them to Fasciolaria than to Pyrula, 
although there exists hut one fold on the columella, in place of 
wo or three. 
The excluded ovaries consist of a long series of oval, parallel 
ollicles or disks of little thickness, attached hy one side to a con- 
necting string each of these disks contains numerous young ones, 
of which the shell is very obvious and even tolerably firm in its 
consistence. Such ovaries are very abundant on our coast. They 
exhibit at length a rounded perforation in the edge of the follicle, 
opposite to the string, whence the young shells escape. All this 
this is very well represented by Lister in his Conchology, plates 
879 and 881. 
Fulgur pyrtjloides. — Specific character. Pale yellowish or 
white, with rufous, dilated lines, interrupted in the middle ; suture 
canaliculated. 
Seha. Mus. vol. Z. pi. %^,fig. 19, 20 ? 
List. Conch., pi. 877. 
Martini, Conch., 3, t. 661,/! 736, 737. (Lam.') 
Encycl. Meth., pi. 443,/! 2, a, h. (Lam.) 
Bulla ficus, var. h. Gmel. 
Fulgur pyruloides, nob. Journ. Acad. Nat. Sci., vol. 2, jp. 237. 
Pyrula spirata, Lam. Anim. sans Vert., vol. 'l,p. 142. 
Bulla py rum. Dillwyn, ed. Lister Conch., Index, p. 39. 
Lamarck was unacquainted with the native country of his syi- 
rata, the description of which he published in August, 1822, 
which gives the priority to pyruloides, as this was published in 
July of the same year, twelve months after it had been read to the 
Academy. It inhabits our Southern coast, and I never found it so 
far North as New Jersey. PI. 19. 
[Am. Con., p. iii. Sept. 1831.] 
Alasmodonta. — Shell unattached, transverse, equivalved, in- 
equilateral ; cardinal teeth one in each valve, irregular, simple or 
biparted ; lateral teeth none ; muscular impressions two principal 
14 
