J27. CONTRIBUTION TO 



C ARPENTEROBLASTUS VERYI, N. Sp. (Rowley). 



Plate 86. Fi«s. 46, 47, 48. 



The three basal plates form a shallow cup or low inverted frustum of a 

 cone. The fork pieces are about three-fourths of the body height, The del- 

 toids are nearly a fourth of an inch long on the type specimen, but confined most- 

 ly to the flattened summit. The ventral region is considerably sunken as in all 

 the known species of this genus. 



The spiracles are apparently minute, while the anal opening is of average 

 size and with the tip of the deltoid a little swollen above it. The ambulacra 

 are very narrow and somewhat below the bounding edges of the radial and 

 deltoids. 



The radial lips with the inclosed ambulacrum form a rather steep ridge 

 that assumes considerable elevation at the distal end of the ambulacrum so that 

 a basal view of the blastoid is very noticeably stellate, recalling Orophocrinus. 

 The inter-ambulaeral area is almost dat from ambulaeral ridge to ambulacra] 

 ridge. The distal end of the ambulacrum droops below the inferior surface of 

 the radial, and the outline from that point to the stem base is an incurved arc. 

 The plate sutures are so strong as to appear to be grooved. 



The stem base is quite large. 



No surface ornamentation is preserved since the specimens are silieified. 



Length of the larger of the two specimens and the one figured, one-half an 

 inch, width eleven-sixteenths. 



This species differs from C. inagnihaHiH in its" strong, stellate outline, 

 greater elevation of the ambulaeral ridges, nearly flat inter-ambulacral spaces, 

 greater size of the deltoids and the shape of the dorsal side. In C. mag n't ha sis 

 the lower portion of the radials and the basal plates form a low rounded con- 

 vexity, while in ('. reryl the basal plates alone enter into the formation of a 

 low inverted frustum of a cone. C very'i bears a stronger resemblance to the 

 cast of the visceral cavity of C. tnagnthasis than it does to the real fossil, 

 in the projection of the distal ends of the ambulacra, it approaches somewhat 

 C. Stella but is a much larger species. In fact it is larger than C. magnihasis. 



The finding of this fossil in Kentucky and the probability that its horizon 

 is Keokuk, are very interesting pieces of information. Carpenteroblastus 

 has not been found beyond the limits of northeast Missouri till the present 

 specimens came to light, and not beyond the limit of the basal one foot of the 

 upper Burlington limestone. 



'JMie specilic name is in honor of the collector, Mr. Charles Very, of New 

 Albany, Ind. 



From the supposed horizon of the Keokuk it was collected, on the top of a 



