30 



Mr. W. T. Caiman on 



lobe of antennules broad and roundel. Posterior lobe of 

 scaphognathite acutely pointed (PI. II. fig. l,c). Second 

 pair ot perteopods unequal, the carpus of the longer multi- 

 articulate. Branchial formula: — 



Type species Pandalus Montagid, Leach. 



Pandalus Montagui^ Leach. (Pis. L-IV. fig. 1.) 



Pandalm Montagui, Leach, Edinburgh Encyclopjedia, vii. p. 4;j2 



(1814). 

 Pandalus an7iulicornis,liea.ch, Malacostraca Podophth. Britaiini.-e, pi. xl. 



(1815); Krover, Voyages en Scandinavie, Crustac^s, Atlas, pi. vi. 



fig. 8, a-c (1846) ; *Bell, Hist. Brit. Stalk-eyed Crustacea, p. 297 



(1853). 

 Paudalus Montagxd, AVhite, Cat. Brit. Crust. Brit. Mus. p. 41 (1850). 



Description. — The length of the rostrum (PI. L fig. 1, a) 

 referred to that of the carapace as unity varies in our specimens 

 from 1*2 to 1*5*. It is curved strongly upwards, rather 

 deep, and bifid at the tip. The number of spines on its 

 upper edge, including those on the dorsal crest of the carapace, 

 is ten or eleven (in one specimen twelve) ; of these four are 

 placed on the cara))ace behind the orbital notch, or in some 

 cases the fifth spine is just over the posterior margin of the 

 notch. In only one case out of about twenty examined were 

 there only tliree spines behind the orbit. Below, the edge of 

 the rostrum is cut into 5 or 6 strong teeth. 



The flagella of the an<e/i?i?i/e5 are approximately equal in 

 length to the carapace and reach to the tip of the rostrum or 

 only a little way beyond. The basal lobe is fringed with 

 setaj on its anterior edge. 



The ontennal scale (PI. II. fig. 1, h) has its outer edge 

 straight or slightly convex, terminating in a spine which 

 projects beyond the rounded tip of the scale. The width at 

 the tip is more than one third of the greatest width at about 

 one quarter the length from the base. It is to be noted that 



• The length of the carapace is taken from the posterior edge in the 

 mid-dorsal line to the back of the orbital notch, while the rostrum is 

 measured forward from the la-st-named point. 



