CRTTSTACEA. 
107 
Eurystheus erythrophthatsius.— Z*7y«Jor«/, in ofvers af Kongl. 
Vet. Alcad. Zorhandl, 1855,^. 124. 
Not uncommon in Plymouth Sound, and it has been sent to us, 
among other places, from Banff, by Mr. Edward. 
Genus, Amathilla. — Bate and Westwood, j). 459. 
Head produced to a sharp point. Antennm rather short. First 
pair with a second branch. Hands small, subequal. Back carin- 
ated. Tilson entire, slightly emarginate at apex. 
Aaiathilla sabini. — Leach, Basse’s First Voyage, oot. ed., ii,p. 178. 
This is an arctic species. First taken in Baffin’s Bay by Genl. 
Sabine, during Eosse’s first expedition. It has since been found 
on all the northern places where naturalists have dredged, both 
on the European and American coasts. Those from the Arctic 
seas and the coast of Scotland are large, being about an inch in 
length, but the size appears to diminish in regular proportions as 
it processes southward. In Shetland and the Moray Frith it is 
scarcely as large as the Arctic specimens. At the Menai Straits 
it is scarcely half as large, and on the south coast of Cornwall it 
appears to have reached its minimirm size, as it has not been 
recorded further south. It wiU be found in rocky pools near low 
■Water mark occasionally everywhere. 
Genus, Gammauus. — Fahricius. 
Three posterior rings of the body furnished with bundles of 
short spines. Eyes long, narrow, or curved. Antennte slender, 
With a short second branch. Hands not large, subequal. Telson 
double. 
Q'Amaiarus marpnus. — Leach, Lin. Trans , xi, p. — Bate and West- 
wood, p. 370. 
The colour of the animal is olive-green. They are very gre- 
garious, and live amongst the seaweed on our shores, and frequent 
®8tuaries a considerable distance from the mouth of every river. 
Q'Amhakus campyeops. — Leach, Fdin. Ency. — Bate and Westwood, 
p. 375. 
This species is named from the crooked shape of the eyes. It 
^•Ppears to be an intermediate form between G. marinus, and 
^ovusta. It is not very common, but it has been taken among 
other places in Plymouth Sound, 
