184 THE ZOOLOGIST. 



former species, which are more forward and closer to the medial 

 ridge ; it is these additional tuhercles that are its chief specific 

 feature. The anterior pair of legs are very long in the male, 

 robust, and having the forceps slightly serrated. The female has 

 these limbs of the normal length, while the carapace is similar in 

 both sexes. 



This species is considered by Bell to be the most rare of the 

 British Ebalias ; he gives it as having occurred at Plymouth 

 Sound, the Frith of Forth, Connemara, and Belfast Bay. It has 

 also been recorded from St. Andrew's ; Galway (common) ; 

 Dublin (rare) ; Aberdeen ; the Hebrides ; Moray Frith ; and the 

 coast of Northumberland. It is said to be rare in Cornwall. We 

 have obtained it from off Torbay and Start Point, in which 

 locality it is not unfrequently found. 



Eballa tubcrosa, Pennant. 



This species is the largest of the genus, and may be dis- 

 tinguished by several decided specific features. The carapace is 

 raised and divided by two rounded ridges crossing each other 

 from the four angles ; it is roughly granulated and of a reddish 

 brown colour, though in favourable localities it often assumes a 

 much brighter tint. The anterior pair of legs are robust, and, like 

 those of E. Crancliii, are rounded, carinated slightly, and have 

 the forceps serrated ; the remaining legs are simple. The 

 abdominal segments of the male are long and narrow, having 

 also the third, fourth, fifth, and sixth joints "soldered" together; 

 those of the female are broad and rounded in form. 



According to Prof. Bell, this species, although less rare than 

 the preceding ones, is by no means common ; but as their 

 habitat is the coralline zone preferably, this may to some extent 

 account for their apparent rarity. We have obtained it in con- 

 siderable numbers from Guernsey, the South Devon coast, and 

 from mid-channel off the Sussex coast. Those from the latter 

 locality were remarkably fine specimens, and one had a young 

 oyster, about one-fourth the size of the animal itself, attached 

 to its carapace. In Jersey we observed it to be somewhat 

 scarce. 



In Bell's work it is recorded from Devon, Dorset, Berwick- 

 shire, Cork, Belfast Bay, and off the Mull of Galloway. It has 

 also been taken at St. Andrew's and Shetland (at the former 



