208 



The specimen is about two inches in length and nearly three 

 fourths of an inch in diameter, in its contracted state. '' Body- 

 between the rows of suckers of a beautiful bluish color, smooth, 

 and shining, with light pink reflections. Suckers when con- 

 tracted, fawn color ; when extended, white." (St. MSS.) The 

 suckers are somewhat numerous, in five well defined lines, each 

 row being biserial, with a narrow space between the series. The 

 sides of the suckers are supported by multitudes of minute, 

 double-crested, perforated spiculse very similar to those of Scle- 

 rodactyla briareus ; the crests, with their triple points, project 

 through the integuments, bristling the sucker in all directions. 

 The terminal plate or disc is correctly represented by that of the 

 species last mentioned. In one or two instances the suckers are 

 bifurcate. 



The oral circle is composed often pieces, each terminating in 

 a short blunt point anteriorly. The alternate pieces, to which 

 the retractor muscles are attached, are prolonged posteriorly in a 

 slender bifurcation, an arrangement similar to that in 5^. briareus, 

 though the parts have no such close union or soldering as in that 

 species. 



The form of the tentacula is sufficiently expressed in the 

 generic characters. Their calcareous deposits are in very 

 small quantity, chiefly confined to the main stem or lower 

 branches, very irregular in shape. 



The integuments contain calcareous matter in abundance, not 

 in well-defined plates, as in Chirodota arenata, where the quan- 

 tity is similar, but in delicate, superposed, laminse, each layer 

 thickly perforated, but no perforation extending through the entire 

 deposit. 



No opportunity having yet occurred to investigate fully the 

 generative, digestive, or respiratory organs, or the papillae of the 

 anus, descriptions of them are for the present deferred. 



This species was found near Fort Johnson, S. C. by Lieut. 

 Kurtz, U. S. A. and Mr. William Stimpson. It was in shallow 

 water, buried about two inches beneath the sand. But a single 

 specimen was obtained. For the liberality which has placed this, 

 as well as other species of the same family from that region, 

 in my hands for description, I desire to express my grateful 

 acknowledgment. 



