new Crustacea fro m Devon and Cornwall. 294 



carries five setas ; the setas are arranged in three groups — the 

 two outer are close together, so also are the next two, but 

 there is a moderately wide space between the two pairs of 

 setas and also between the inner pair and the last seta situated 

 a small distance up on the inner edge ; in the space between 

 the outer and inner pairs there appears to be a small spine. 

 The secondary joints are broadly ovate, the length being 

 scarcely twice the width at the broadest part ; the inner 

 margin is nearly straight, but the outer is moderately convex ; 

 a small seta springs from the middle and an elongated one 

 from near the distal end of the inner margin, while other five 

 are arranged round the lower half of the outer margin and 

 apex. 



The furcal joints are very short. 



Hab. Dredged near Beggar's Island, Plymouth, in 1889 ; 

 apparently not very common. 



This species is readily distinguished by the robust form 

 and structure of the first pair of natatory legs, the stout eight- 

 jointed antennules, and the form and armature of the fifth 

 feet. 



Dactylopusia ornata, sp. n. 



Description of the female. — Body moderately robust; length 

 •62 mm. (^ of. an inch). 



Antennules short, moderately stout, and composed of six 

 subequal joints. Outer ramus of posterior antennas appa- 

 rently only two-jointed. Mouth-organs as in D. rostratus, 

 T. Scott. 



The first thoracic legs are short and stout ; the three-jointed 

 outer branches are rather shorter than the first joint of the 

 inner ones ; the first two joints have the outer margin fringed 

 with short setae, and a setiferous spine springs from their 

 outer distal angles ; the second joint bears also a plumose 

 seta on its inner margin ; the end joint is small and bears 

 several spiniform apical seta?. The inner branches appear to 

 be only two-jointed ; the first is stout and elongated, and 

 bears a long plumose seta on its inner margin ; the end joint 

 is short and probably composed of two coalescent joints, it is 

 furnished with a stout and slightly curved claw-like terminal 

 spine. The next three pairs resemble those in D. rostrata 

 (T. Scott). 



The fitth pair are broadly lamelliform ; the primary joint 

 bears interiorly five setas of unequal lengths on the broadly 

 rounded distal edge ; the secondary joint is subquadrangular 

 and carries five stout setas, one being near the distal end of 



