D EXAMINE TENUICORNIS. 
241 
he therefore described it as wanting. We were only ac- 
quainted with this species from the description and figure 
of Rathke, until it was recently sent to us by the Rev. 
A. M. Norman, who, in company with Mr. Jeffreys, took 
it between the tide-marks at Lerwick, in the Shetlands. 
We are, however, much inclined to consider it as only 
a variety of Montagues species, and it will be for future 
observation to determine whether the absence of a small 
denticle, and other peculiarities noticed above, are of 
specific importance. 
The accompanying vignette represents a cutter and 
steamer : the former probably with some naturalist on a 
dredging expedition. 
R 
