MUSEUM OF COMPAKATIVE ZOOLOGY, 31 



The only specimen carrying eggs is the one ahove referred to as taken off 

 the mouth of Chesapeake Bay. In this specimen the eggs are in an early stage 

 of development, are nearly spherical and .65 to .70 mm. in diameter, and are 

 carrietl in a mass behind the first pair of abdominal appendages, and between 

 the appendages of the second and third pairs, the mass being principally sup- 

 ported by the first pair, very slightly by the third, and not at all by the fourth 

 and fifth. 



Five specimens give the following measurements in millimeters : — 



Station 32G 898 326 329 326 



Sex 9 9 9 S S 



Length from front of carapax to tip of 



telson 60.0 124.0 126.0 83.0 107.0 



Length of carapax along median line 26.0 53.2 55.2 36.0 45.3 

 Breadth of carapax between spines of 



anterior margin . . .12.9 25.5 27.3 16.5 23.0 



Greatest breadth (in front of cervical 



suture) ..... 

 Length of first pair of legs * . 



" merus 



" cai-pus .... 



" chela 



" dactylus 



" second pair of legs 



" merus . .' . 



" carpus 



" propodus 



" dactylus 



" fifth pair of legs 



" propodus . 



" dactylus 



" abdomen . 

 Greatest breadth at second somite . 



" " sixth somite 



Length of telson .... 

 Breadth of telson 



* In the second, third, and fourth columns the measurements of the first pair of 

 legs arc taken from the right leg ; in the first and last columns, from the left. In the 

 sp.'cimen of which the measurements are given in the fourth column, both legs of 

 the first pair are present and the left one is a little shorter than the right and gives 

 the following measurements : length, 153 ram. ; merus, 47 ; carpus, 31 ; chela, 48 ; 

 dactylus, 28. 



