372 ARCTURHLE. 



A double row of tubercles run down each side of the 

 inferior margin of the body, immediately above the inser- 

 tion of the legs; these tubercles are large and very promi- 

 nent on the three anterior and three posterior segments 

 of the body, but on the fourth they are not so prominent, 

 and are placed in a regular series on each side of the lon- 

 gitudinal hinges peculiar to this segment in the female. 



The pleon bulges considerably, and then tapers sud- 

 denly to a point at its posterior extremity. 



The animal is of a straw colour, spotted with brown. 



Not having seen a specimen of this species, we have 

 been compelled to borrow our description and figures 

 from Mr. H. Goodsir's Memoir on the genus above re- 

 ferred to. It was taken in the Frith of Forth, opposite 

 Anstruther, by Mr. H. Goodsir. 



