PLEIOCENE FOSSILS. 11 



ancient fauna, the name of my valued friend, Dr. Edmund Ravenel, who has himself been 

 the pioneer in the study of the lower animals at the South. 



Plate LTL, Fig. 3. The part of this species corresponding to fig. 2 of P. Holmesii, lut more perfect. 

 It will he observed that the belt-bearing-plate is without any row of great hnops. 

 Another fragment of the same part of the left side, not here figured, discovers the 

 same peculiarity. 

 " 3a. Imperfect breastplate. 



Locality. The Grove, Cooper River, S. C. (J. McC.) 



Museum, College of Charleston. 



Of the Echinodermata thus described, not one is found in the Meiocene of Virginia ; 

 Amphidettjs orthonotus (Plate II., fig. 1,) is from the Meiocene of James River, Virginia, 

 and introduced for comparison. Encope Macropora has its living analogue in Encope 

 grandis, (Agass.) and Mellita Caroliniana, in Mellita hexapora, (Linn.) A few genera 

 of Echinodermata are found as far back as the Palaeozoic period ; from the Triassic upwards 

 they increase in number, and have their maximum development in the present seas. 



MOLLUSCA.-LIO. 

 BRYOZOA. — Ehren. 



LUNULITES.— Lam. 

 LUNULITES DENTICULATA.— Con. 



Plate IV., Fig. 1 to 5. 



Lunulites denticulata, Con., Am. Jour. Sci., Vol. XLL, p. 348. (1841.) 

 Lmmlites denticulata, Ions., Quar. Jour. Geol. Soc, London, Vol. I., p. 503. 



L. subconica, depressa ; superficie interna, radiato -striata gramdata vel punctata ; celhdis 

 oblongis, denticulatis, quincuncialibus ; oribus orbiculatis, vel semi-orbicidatis ; margine 

 cremdata. 



Description. — Subcorneal, depressed; interior surface radiate-striated, granulated or 

 punctate; cells oblong, denticulate quincunx; mouths circular or semicircular, margin 

 crenulated. 



