176 



NEW YORK STATE MUSEUM 



flagellum longer than peduncle. Pleon apparently consisting of 

 four segments, the first three short, the last long and tridentate. 

 Length: males 30-36 mm, breadth 8-9 mm; female smaller, rarely 

 exceeding 20 mm. 



Color very variable, frequently a uniform light or dark green or 

 brownish with minute black punctations. Very often there is a 

 dorsal stripe. Rarely the colors are arranged in transverse bands 

 and blotches. Females usually darker than males, often with a light- 

 lateral stripe. 



Found on the seaweed on rocky shores or in eelgrass where its 

 color is protective. Sometimes found far from land on floating 

 seaweed. Common all along the shore. 



Idotea phosphorea Harger 



Idotea phosphorea Harger. U. S. Com. of Fish and Fisheries. 

 Rep't. 1874. p. 569 (275). /. c. 1880. p.347, pi. 5, fig.27-29. Richardson. /. c. 

 1901. p.541. 



Body with sides parallel. Antennulae short, of four segments. 

 Antennae longer, with multiarticulate flagellum, which is shorter 

 and stouter than in preceding species. 

 Pleon apparently consisting of four seg- 

 ments, the first three short, the last 

 pointed. 



The young of this species resemble the 

 young of the preceding, but may be dis- 

 tinguished by the epimeral sutures not 

 crossing entirely the second and following 

 segments. 



Length 25 mm, breadth 7 mm. Color 



varied, dark green or brownish with 



patches of yellow or whitish, not striped 



as in I . marina. 



Found among the rocks and seaweed along with the last, but 



much more rarely, being a more northern form. Small specimens 



taken at South Beach, S. I. 



Fig. 48 Idotea phos 

 phorea (After Harger) 



