Wi AUNALS NEW YORK ACADEMY OF SCIEyCES 



Ccelenterata 

 Lophophyllum profundum van radicosum var. nov. 



Associated with individuals having the character of Lophophyllum pro- 

 fundum, occur other specimens which differ strikingly in the profuse develop- 

 ment of hollow, spiniform stolons. Correlated with this character are usually 

 a more rapid expansion, a more irregular growth, a rather straighter shape 

 and the possession of a thinner, more knife-like pseudo-columella. The stolons 

 which are usually broken off close to the epitheca, disclosing their tubular 

 structure, are especially developed in the lower portion of the corallum. It 

 seems doubtful whether these structures served primarily for support, since 

 they are found in specimens having an unusually broad and secure attachment 

 and are absent from others in which the point of attachment is small, and 

 the anchorage apparently insecure. 



The stolons vary from large and very abundant to small and reduced to 

 only one or two in number. In this way, a gradual transition is effected 

 between the two forms which in their extreme expressions look very much 

 unlike each other, while among intermediate and less strongly characterized 

 specimens, a dividing line can hardly be drawn. The forms with more or less 

 straight, irregular, rapidly expanding coralla graduate on the one hand into 

 those with very abundant stolons, and on the other into the narrow, mure or 

 less curved, regular coralla of typical profundum. It seems to be true, how- 

 ever, that the narrow, regular growths seldom exhibit any development of the 

 root-like process. 



Horizon and locality : Wewoka formation ; Wewoka quadrangle, Coal- 

 gate quadrangle, Okla. 



EcMnodermata 

 Hydreionocrinus patulus sp. nov. 



This species is based on a somewhat imperfect calyx which is distinguished 

 by its low convexity. The median portion of the under side is strongly con- 

 cave and the height of the whole is but little greater than the thickness of the 

 plates. These peculiarities may. however, be somewhat enhanced by com- 

 pression. 



The general shape is pentagonal, with angular notches at the corners and a 

 wider irregularity at the azygous angle. The plates themselves are thick and 

 they are highly tumid on the outer side. They tend to recurve near the mar- 

 gins so that the sutures are not as depressed as the general curvature of the 

 surface, if continued to the edges, would make them. The plates near their 

 margins tend to be rather regularly and finely crenulated and the infra-basals 

 and adjacent portions of the basals are finely granulose. Unless lost through 

 erosion, these markings do not extend to the other plates. 



The infrabasals form a small pentagon of which the radius of the scar of 

 the stem occupies half the distance from the center to the side. The scar is 



