ISOPODS OF NORTH AMERICA. 



383 



SYNIDOTEA CONSOLIDATA (Stimpson). 



Idotea consoUdata Stimpson, Proc. Cal. Acad. Sci., 1, 1S56, j). 89; Bnst. Jour. Nat. 



Hist., VI, 1857, p. 508. 

 Edotea hicuKpidn Mieks, Jour. Linn. Soc. London, XVL 1883, j). W. 

 Sipiidotea amsolidata Benedict, Proc. Acad. Nat. Sci. Pliila., 1897, p. .S93. — 



Richardson, Proc. U. S. Nat. Mus., XXI, 1899, p. 848; Ann. Mag. Nat. 



Hist. (7), IV, 1899, i). 268; American Naturalist, XXXIV, 1900, p. 227. 



Locdllty. — Pacilic Grove, California. 



Body ovate, twice as long as broad, 4 mm. : IS mm. 



Lenoth of abdomen, 3 mm. 



Head with a slight median excavation. Posterior 



to the median notch are two small tubercles on either 



side of the median line. Lateral to these tubercles 



and in front of the eyes are two larger tubercles, 



one on either side. Between the 63^68 in a trans- 

 verse line are two small tubercles, one on either 



side of the median line and a little farther apart 



than the two anterior tubercles. Posterior to these 



two tubercles in the middle of the head is one small 



tidjercle in the median line close to the posterior 



margin. The eyes are large and round, composite 



in structure, and placed close to the lateral margins. 



The basal article of the first pair of antenme is short 



and not dilated; the first, second, and third articles 



are about eciual in length; the fourth is nearly twice 



as long as the third. The first antennie extend to the end of the third 



article of the peduncle of the second antennsv. The basal article of the 

 second pair of antenna^ is almost inconspicuous; the 

 second is short; the third and fourth are increasingly 

 longer than the second; the fifth is about one and a 

 half times longer than the fourth. The flagellum 

 consists of eight articles. When retracted the second 

 antennse extend to the middle of the third thoracic 

 segment. 



The second, third, and fourth segments of the thorax 

 are longer than the others. The epimera of all the 

 segments are firndy iniited with the segments. The 

 lateral portions of the segments are expanded and the 

 lateral margins rounded in outline. Three longitud- 

 inal rows of low tubercles extend the entire length 



of the thorax, one median row and one on either side of this. On 



each segment these tubercles are situated in a transverse row of three. 

 The abdomen is composed of one segment, with lateral sutures at the 



base, indicating another partly coalesced segment. There are two very 



Fig. 420.— Synidotea 

 consolidata (after 

 Benedict), x 6. 



Fk;. 421. — Synidotea 



CONSOLIDATA. MaX- 

 II.LIPED. X 39. 



