02 



PALEONTOLOGY OF NEW YORK. 



Kutorginn cingnlntn. 

 AUur WaI.coJ 1. 

 Figs. -47, 48 Brachial :m<l pronie views. 

 Figs. 49. Interior of a Ijrachial valve. 



and shiny, us in K. Lahradorica ; like that of Trem.\tis, K. pamula, or Lingul- 

 ELLA, K. sculptilis. 



" The interiors of the valves of 

 the only species we have showing 

 the interiors, K. cingulata, have 

 numerous radiating stria? extend- 

 ing from the beak outward toward 

 the margins of the shell. 



" In the interior of the ventral 

 valve four pairs of scars extend 

 from the beak forward as shown in figure 1 d, pi. ix. 



" The interior of the dorsal valve is divided midway by a narrow mesial 

 rid'i-e that separates two pairs of scars [adductors ?J ; the anterior pair small. 



" Shell-structure calcareous (A', cingulata, K. Whilfieldi), or horny {K. Lahra- 

 dorica, K. sculptilis)." 



Type, Kutorgina cingulata, Billings. 



Although the foregoing diagnosis furnishes many details of this group of 

 shells, it must be admitted that it is still insufficient to establish a satisfactory 

 comprehension of the generic characters or taxonomic position of Kutorgina. 

 Specimens of K. cingulata, from Swanton, Vermont, K. Latourensis, from Port- 

 land, N. B , and A'. Prospeclensis, from Lone Mountain, Nevada, which have been 

 at our dispo.sal, fail to add any features of importance. 



In this genus we meet shells often of considerable size when compared with 

 the associated brachiopods in primordial faunas, having in the type-species at 

 least, a high, incurved pedicle-valve with the form of an Ambocgelia, and a 

 subapical slope ("false cardinal area"), \yhich, according to Walcott,* is 

 " without the trace of an opening," although this feature does not agree with 

 the diagnosis above given, nor with the characters of the subapical area in other 

 species referred to the genus, where the open fissure appears to begin at the 

 apex and widen downwards, having very much the character seen in the genus 

 Ortiiis. The opposite valve, with its highly elevated marginal apex and very 

 slightly developed area, can come into contact with the pedicle-valve only at 



liulletin No. 30, U. S. Geological Sui-vey, p. 103. 



