AB CTURUS. 
221 
Tam. IDOTEIDM 
Terminal appendages of the last false legs very large, 
lamellated, covering all the lower surface of the abdomen, 
and not projecting beyond the first segment, which is shield- 
like and very large. 
Gen. 107. ARCTURUS, Latr. 
Body long; the four first pairs of legs lamellar at the end, 
not fitted for walking or seizing ; the three last pair of legs 
formed for walking. Antennae like legs, and employed in 
seizing and enclosing the prey : the young of the great 
Arctic species adhere to these organs by the legs. 
Aecturtjs longicobnis, Sowerby, sp. (Plate XII. fig. 1.) 
— This species and the two next have the fourth ring of 
thorax as long as all the others together. The body of this 
is rugose, and, with the antennae, is nearly an inch long. 
The eggs are red, and adhere to the under side of the 
largest segment of the body. 
First observed by Mr. T. W. Simmons, entangled in the 
nets of the fishermen, off Dysart, near Inch Keith (Sowerby); 
Cullercoats, Northumberland (Dr. Clarke) ; Falmouth and 
Firth of Clyde (Rev. A. Norman) ; Berwick (Dr. Johnston). 
