GRAPTOLITES OF NEW YORK, PART 2 237 



bundle of thecae, suspended from it, becomes more or less bent upon itself 

 [see text fig. 126J. 



C. calicularis is at once distinguished from all of its conveners 

 in the locks of New York by its short and at the same time stout habit, and 

 the prominent curved apertural spines. It shows a longer nema than any 

 of the other species have exhibited and this is frequently curved directly 

 above the sicula, evidently because the latter has been 

 forced out of its original vertical position in the sus- { . 



pended rhabdosome by the weight of the heavier bundle 

 of thecae which naturally assumed the vertical position 



itself. Fig. 132 Corynoides 



The nema attained a length of two or three times RgoV. BriKSlK $S3S 



Club 



that of the rhabdosome. It is in this species that the 



peculiar appendages of the nema, mentioned before, are observed most 



frequently [see also text fig. 29, 30]. 



The aperture of the sicula was distinctly circular and devoid of all 

 appendages. The apertural part, projecting beyond the bases of the 

 thecae, presents sometimes a wrinkled or withered appearance, as if it had 

 fallen into disuse during the lifetime of the colony. 



Corynoides gracilis Hopkinson 



Plate 13, figures 2, 12, 15, 16 



Corynoides gracilis Hopkinson. Geol. Mag. 1872. 9: 502; pi. 12, fig. 1 

 Corynoides gracilis Lap worth. Cat. West. Scottish Foss. 1876. p. 7; pi. 4, fig. 93 



Description. Rhabdosome long (12 mm) and narrow (.4—5 mm), 

 slightly curved, of uniform width, composed of a sicula and three thecae. 

 Sicula long (.2 mm) and narrow. Thecae extremely slender, of uniform 

 width, not divergent from the sicula, bent outward near their aperture ; 

 each provided with two short straight mucros. Apertures of thecae straight, 

 perpendicular to the axis of the theca. Nema thin and filiform. 



Position and localities. This, the typical form of C . gracilis, has 

 been observed by me only in beds which I consider as somewhat younger 

 than the typical Normanskill zone [see p. 18] viz, at the power house 



