1853.] 



o 



67 



the anterior portion of the body. Color 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. Meckelia Lizzi;e, 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 Ai'RANTiACA, 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 larger size. Ground color of a bright 

 purplish or greenish hue with numerous irregular transverse bands of bright 

 gobien. 



Found at low water mark in holes descending perpendicularly into the sand. 

 Fort Johnston, S. C. 



PLANARID^. 



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 crovrded motiings, 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. 



Dredgpd just below low water mark on a soft muddy sand, east of Fort John- 

 ston, S. C, by Lieut. Kurtz and Wm. Siimpson. 



Genus LMOGiNE, 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. Imogine oculifera, Girard. About an inch and a half in length and an 

 inch w^ide. Uppar 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, S. C, in May, 1850, under stones at 

 low water mark. 



The Committee on a " Notice of the Mja Nodulosa Wood," by Mr. 

 Lea^ reported in favor of publication. 



