428 NEW YORK STATE MUSEUM 



Remarks. As in the case of C . typical is, Hall included this spe- 

 cies at first in C. bicornis, the figures 2e, 20, 2p, 2r, 2s of volume 1, 

 Palaeontology of New York, representing specimens of the same ; and 

 like C . t y p ic a 1 i s , this species when recognized, was not described, but 

 only cited in the table showing the geographical distribution of the grapto- 

 lites, and not even figured. There is in the Hall collection in the American 

 Museum of Natural History a specimen with Hall's printed label " C 1 i m . 

 parvus," of which fig. 388 is an enlargement. This specimen, which is 

 from the Normanskill shale at Kenwood, may properly be used to base 

 the species upon. Gurley has in 1896, on the ground that Hall's term 

 remained a nomeu nudum, renamed and described the species as C . p h y 11 o- 

 phorus Since, however, authentic types of Hall's material are available 

 (and have been used by Gurley according to his own admission, ibid. p. 77) 

 and the form is well known under its old name among paleontologists, it is 

 neither necessary nor desirable to drop that name. 



C . parvus bears similarity to C . antiquu s and C . scharen- 

 berg i ; it is by the character of its thecae and apertural margins shown to 

 be a closer relative of the former, with which it has also the long viroella 

 and basal membrane in common. It differs from it by the closer arrangement 

 of the thecae and its smaller dimensions in general. 



The most peculiar character of this species is to be seen in the vesicle, 

 which has been fully described and figured in the introductory chapter on 

 the dilatations of the nemacaulus [p. 906°]. 



Climacograptus scharenbergi Lapworth 



Plate 28, figure 31 



Climacograptus scharenbergi Lapworth. Cat. West. Scott. Foss. 



1876. p. 6, pi. 2, fig. 35 

 Climacograptus scharenbergi Lapworth. Belfast Club, Rep't & 



Proc. Ser. 2, v. 1, pt 4. T87 7 . Apx. p. 138; pi. 6, fig. 36 

 Climacograptus scharenbergi Linnarsson. Sver. Geol. Und. afh. och 



upps. Ser. C, no. 31. 1879. p. 18 

 Climacograptus scharenbergi Lapworth. Geol. Mag. Ser. 3. 1889 



v. 6, tabic II 



