INDIANA PALAEONTOLOGY. J62. 



METABLASTUS BIPYRAMIDALIS, Hall, Rowley. 



Plate 47. Figs. 21, 22, 23, 24. 



The specimen is much larger than the average example from Boonville, 

 Mo., the place from which the type of the species came. 



In the width of the cup below the ends of the ambulacra the specimen ap- 

 proaches Mr. Gurlej's species J/", icachsniuthi. 



The ambulacra are narrow and less than half the body length, the radials 

 being excavated quite deeply for their reception. 



The interradials are small. 



The specimen is so perfectly free of the matrix that the pain d spiracles 

 are easily seen but unfortunately the tops of the radials about the anal opening 

 have been broken away. 



Small perforations are visible in the ends of the deltoids, but this is due to 

 the condition of silicious replacement and the breaking in of the outside sur- 

 face. 



The column of this fossil was round and almost minute as shown by the 

 cicatrice for attachment. We have a specimen of J/. Uueatus lying upon a slab 

 with a portion of the stem just separated from the base, a slender thread-like 

 rod. 



The stem of Tricoelocrinus is triangular at the base but probably not so 

 throughout. 



From the Warsaw Limestone of Lanesville, Ind. 



All of the fossils described in this paper are from the collection of Mr. G. 

 K. Greene. 



NOTE— In Dr. Hambaeh's uew paper, entitled "Review of the Blast oideje with a pro- 

 posed new Classification and Description of New Species," the two genera Trica-locrinns and 

 Metablastus have both been discarded and the euphonious name Saccoblastus offered in lieu 

 thereof. What possible reason he could have had to rob others of their labors it would be diffi- 

 cult to imagine unless to enrich himself. Perhaps it would be better for science if his already 

 vastly superior cabinet contained the types of all genera of blastoids as it now holds such an ar- 

 ray of "scientific specimens (pathologic and abnormal developments and specimens illuj-tratiug 

 morphology/' but not one individual showing a roofing of small plates over the so-called "cen- 

 tral orifice " Our modest little cabinet of Z^'*.? than ten thousand specimens and collected in ?#«.« 

 X\i2kn fifty years contains many specimens showing this latter feature and the roofing is not com- 

 posed of "little scales or particles of broken pinuise" for, beneath this arch, over every ambn- 

 lacrum is a tunnel. 



In connection with his figures 6 and 7 in the text to show the presence of a "small pro- 

 boscis" he makes this startling statement: "To my knowledge it is the first time that such a body 

 has been obsei-ved on a Blastoid." (This is a correct copy even to the capital in blastoid). In 

 the October, 1900, number of the American Geologist, under the subject "Notes on the Fauna of 

 the Burlington Limestone at Louisiana, Mo.," I called attention to such a structure in these 



