222 CONNECTICUT GEOL. AND NAT. HlST. SURVEY. [Bull. 



Idothea phosphorea (Harger). 



FIG. 69. Idothea phosphorea. 



1874. Idothea phosphorea, Harger, Rept. U. S. Com. Fish, 

 for 1871-2, p. 569. 



1880. Idothea phosphorea, Harger, ibid., for 1878, p. 347, 

 pi. 5, figs. 27-29. 



1905. Idothea phosphorea, Richardson, Bull. U. S. Nat. 

 Mus., No. 54, p. 367. 



Body oblong-ovate, slightly more than three times as long as 

 wide ; length of abdomen equal to greatest width of body. Head 

 broader than long, with anterior margin straight on either side of 

 a very slight median excavation. Eyes moderately large, round, 

 compound and placed just in front of the median transverse 

 line of the head at the extreme lateral margin. 



First antennae with first joint but little wider than second one, 

 each of which is subequal in length to the third joint; fourth 

 joint a little longer than any one of the preceding; extending to 

 end of third peduncular joint of second pair. Second antennae 

 with first joint inconspicuous and second and third joints subequal 

 in length; fifth joint longer than fourth which in turn is longer 

 than the third; flagellum shorter than peduncle and made up of 

 about a dozen segments. 



Thoracic segments subequal in length, except the first which 

 is shorter in the mid-dorsal line. Coxal plates distinctly marked 

 off from their respective segments, except in the case of the first 

 segment, and each one in turn occupying a larger part of the 

 lateral margins and becoming wider posteriorly. Legs of more 



