` 
378 Dr. H. A. Nicholson on the Genus Climacograpsus. 
of the ‘Systema’ (Stockholm, 1768) there is to be found a 
description of a fossil termed by Linneeus G'raptolithus scalaris, 
the exact nature of which has formed a subject of some con- 
troversy. This so-called G. scalaris was originally described 
by Linneus and figured in his ‘Scanian Travels’ (Skanska 
Resa), which were published in 1751. I have not at present 
an opportunity of reproducing the original figure of Linneeus ; 
but I subjoin a copy of the facsimile of the same given by 
Geinitz (Die Graptolithen, t. 6. fig. 20), which will be accu- 
rate enough for all practieal purposes (fig. 3). 
Fig. 3. 
Figure of Graptolithus scalaris, Linn., after Linneus. From ‘Skanska 
Resa,’ p. 147. Copied from Geinitz. 
From this figure it will be seen that two wholly dissimilar 
objects are represented in this primitive sketch. The two 
spiral bodies are unquestionably Graptolites, and may very 
possibly be referable to the base of the species now known as 
G. Sedgwickii, Portl. The straight body, however (^ lineam 
Striasque transversas referens") is the original G. scalaris; 
and a rather unfruitful controversy has been carried on as to its 
exact nature. The question, however, is not wholly unimpor- 
tant, as changes in our nomenclature have been advocated on 
the basis of the supposed nature of this figure. 
. By Wahlenberg, Geinitz, and Barrande, Œ. scalaris, Linn., 
is regarded as a unicellular or monoprionidian Graptolite (viz. 
G. sagittarius) compressed in a direction rectangular to the 
cellules, so that the apertures of the cellules are shown running 
across the stipe transversely, Upon this view the term “ sca- 
estes tima 
