64 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



congener, E. cuhensis Saussure, by the fact that the latter has the 

 carapace more depressed, wider in ratio to its length, and the an- 

 tennae decidedly shorter than are those of E. emerita. The males of 

 E. emerita are much smaller than the associated females ; the pair fig- 

 ured show the average difference. 



Type: Linnaeus states: ''Habitat in mari Indies"; H. Milne Ed- 

 wards states that it inhabits the coasts of Brazil. Say's type came 

 from Charleston, S. C, and is deposited in the Philadelphia Academy 

 of Natural Sciences. Say states in his original description of the 

 species, E. talpoidea, that it ''inhabits the coasts of the United States. 

 Common." 



Distribution: Known from the east coast of the United States, 

 Central America, the West Indies and the east coast of South America 

 as far down as the mouth of the Amazon. 



Material examined; Ten specimens from Miami Beach, Florida, 

 January, 1923. 



Habits : The life cycle of this odd little crustacean has been admir- 

 ably reported by Dr. S. I. Smith (Trans. Conn. Acad. Arts and Sci., 

 Ill, p. 311) and by Fritz Muller, from South American material, in 

 his work entitled *'FUr Darwin" (English translation, London, 1869, 

 p. 54, fig. 25). 



Technical description: Carapace oval, shuttle-shaped, 28 mm. 

 long, 20 mm. maximum width across the middle, decidedly convex in 

 both directions, with numerous transverse imbrications on the pos- 

 terior regions, with the exception of one short, prominent, transverse 

 line just behind the rostrum and one deep recurvate line anterior to 

 the median region; the imbrications resemble miniature wave ripples 

 on the sand. The rostrum is short, bluntly triangulate, separated on 

 either side by a U-shaped sinus from the submedian pair of teeth, 

 which are a trifle longer and narrower than the median tooth and with 

 the tip acute; the anterolateral margins are irregularly concave and 

 serrulate; the postlateral margins are produced, forming a covering 

 over the bases of the legs and with the lateral edge convex. 



The abdomen is flexed, so that the sixth segment and telson are be- 

 neath the body; the first segment is rudimentary, linear; the second 

 is very wide, with the epimera rounded and ciliated on the margins; 

 there are transverse lines on the epimera; the third, fourth and fifth 

 segments are successively shorter and narrower; the sixth segment is 

 about three times as long as the fifth segment, with the proximal part 

 wider than the distal, from which it is separated by a slight line; 



