1853.] 367 
the anterior portion of the body. Cclor uniform yellowish white, reddish 
anteriorly. 
Found on the third and fourth subregions of the littoral zone, along the coast 
of North and South Carolina. 
6. Mecxetta Lizzim, Girard. Body six or eight inches long, flattened. Head 
rather short and rounded, without any vertical splitting of the snout. Genera- 
tive aperture oval, pointed anteriorly. Color uniform dull yellowish white. 
When immersed in alcohol, the body assumes the same shape as in the preced- 
ing species. 
Inhabits the sandy flats near Fort Johnston, Charleston Harbor. 
Genus STIMPSONIA, Girard. Body elongated, subcylindrical or compressed, 
provided with an expanded back, on the surface of which blood-vessels are ob- 
served, as in Acteons. Cephalic region marked with an annular and smooth 
membrane, overlapping the anterior part of the body. A broad, terminal and 
subcircular opening communicating with the general cavity of the body, and 
through which the products of the general apparatus find their way outwards. 
At the upper margin of the cephalic ring there is a funnel-shaped or rather 
corolliform organ somewhat like the corolla of the dragon root (Arum) in the 
centre of which a cylindrical proboscis may be seen, at the inferior part of 
which the mouth opens. The animal sucks its food through this proboscis, and 
the surrounding disc assists in adhering to its prey. There are no eye specks. 
7. STIMPSONIA AURaNTIACA, Girard. Body compressed laterally: transverse 
diameter about a quarter of an inch; depth greater than the horizontal diame- 
ter. Periphery of the anterior opening undulating. Length of the body about 
six inches, and probably attaining a Jarger size. Ground color of a bright 
poepee or greenish hue with numerous irregular transverse bands of bright 
golden. 
Found at low water mark in holes descending perpendicularly into the sand. 
Fort Johnston, S. C. 
PLANARIDZE. 
8. PLANOCERA NEBULOSA, Girard. Body about half an inch in length, and a 
quarter of an inch wide, elliptical, provided with two whitish, protractile and 
retractile tentacles, a tenth of an inch in height when protruded. Ground color 
dark hyaline, with dark crowded mottlings, giving to the whole a dark grayish 
appearance. From the tentacles a medial dark brownish red line extends to the 
posterior margin. Beneath gray, except two whitish convolutions, the genital 
apparatus seen by transparency, anteriorly tinged with pink. The periphery is 
whitish hyaline. 
Dredged just below low water mark on a soft muddy sand, east of Fort John- 
ston, S.C., by Lieut. Kurtz and Wm. Stimpson. 
Genus IMOGINE, Girard. General form elliptical, discoid, periphery con- 
tinuous, provided all around with a crowded series of minute black specks. Two 
tentacles on the anterior third of the body, and terminated by an oculiform 
organ. 
9. ImocinE ocuLireRA, Girard. About an inch and a half in length and an 
inch wide. Upper surface fuscous, clouded with dark red spots; unicolor 
beneath. Tentacles cylindrical, swelling towards the top, and terminated by a 
rounded black eye. 
Found by myself at Sullivan’s Island, 8. C., in May, 1850, under stones at 
low water mark. 
The Committee on a “ Notice of the Mya Nodulosa Wood,” by Mr. 
Lea, reported in favor of publication. 
