ZOOLOGY. 
CCXXV 
Nymphum Grossipes. 
Pycnogonum Grossipes Faun, Green. No. 310. Zool. Dan. v. 3. p. 67. t. 119? 
Abundant at ebb tide on the shores of the North Georgian Islands, agree- 
ing in all respects with the minute description of O. Fabricius, 1. c., except 
in the palpi, (described as antennae,) which in these specimens were of five 
instead of four articulations, the first being very short and tubular ; Fabricius 
has also omitted to notice that the tarsi are jointed; the first joint is shorter 
than the second. 
The account annexed to the figure of the P. Grossipes in the Zool. Dan., 
refers to this description of Fabricius as being a most perfect one; 
but on comparing the figure with the description, and both with the 
.specimens under notice, the following differences are observable ; the middle 
and longest joint of the haunch appears short in the figure ; the first joint of 
the tarsus is longer than the second ; the fingers of the mandibles are not of 
equal length, and the palpi are proportionably shorter in comparison with the 
rostrum. It may be inferred from these differences that the P. Grossipes 
figured in the Zool. Dan., is neither the P. Grossipes of Fabricius, nor the 
present species. 
There are three essential points in which the species under description differs 
from the N. Gracile and N. Femoratum of Dr. Leach, Zool. Misc. vol. i. t. 19 ; 
in the fingers of the mandibles, which curve in a contrary direction to each 
other, and meet only at the point instead of along their whole inner edge; in 
the palpi being of five instead of six joints ; and in the first joint of the tarsi 
being shorter than the second. These points are not indeed expressly men- 
tioned in the specific description of the N. gracile and femoratum, but they 
are inferred, as forming a part of the prefixed character of Dr. Leach’s Genus 
Nymphum; the thighs of the present species being compressed, (more in 
some individuals than in others,) give it in other respects a near resemblance 
to the Femoratum. 
