1132 THE VOYAGE OF H.M.S. CHALLENGER. 



To these should be added, from his account of the subfamily Podocerinae, the 

 following characters : — 



" Upper Lip apically little sinuate. 



" Secondary plate of the Mandibles large. 



" Lower Lip broad. 



" First Maxillw having the palp armed with few, elongate spines ; the inner plate 

 little, ovate, without setae. 



" Second Maxilla broad ; the outer plate very broad and longer than the inner. 



" Maxillipeds with the plates of moderate size ; the inner plate armed with three 

 teeth, the outer with very many strong teeth [on the inner margin], longer teeth on the 

 apical margin, the series ending with curved seta? on the outer margin ; the palp very 

 large ; the second joint elongate. 



"The body subdepressed ; the back rounded; the side-plates small. 



" The Eyes situated on the lateral lobes of the head. 



" Upper Antennae with the peduncle long; the third joint almost equalling the second 

 in length. 



" Lower Antennae with the flagellum of few or many, never very many, joints. 



" First Gnathopods subchelate, smaller than the Second. 



" Telson thick, furnished with spines or teeth." 



The other characters mentioned by Boeck have either been included in his character 

 of the family, or do not refer to the genus Podocerus. It has been pointed out by 

 S. I. Smith l that for Cerapus \Erictlionius~\ longimanus, which Boeck assigns to this 

 group, he himself figures the inner plate of the first maxillae with setae, so that the 

 absence of setae from that plate is not a valid character of the group. It may be added 

 that in the description of Podocerus latipes, Kroyer, Boeck expressly states that the 

 inner plate of the first maxillae has setae on the apex. 



Podocerus falcatus (Montagu) (PI. CXIX.). 



1808. Cancer Gammarus falcatus, Montagu, Trans. Linn. Soc. Lond., vol. ix. p. 100, pi. v. 



fig. 2. 

 1847. Cerapus falcatus, Thompson, Ann. and Mag. Nat. Hist., vol. xx. 

 1857. Podocerus falcatus, Spence Bate, Synopsis, Ann. and Mag. Nat. Hist., ser. 2, vol. xix. p. 



16 (sep. copy). 

 1857. Jassa falcata, White, Popular History of British Crustacea, p. 198. 

 1862. Podocerus falcatus, Sp. Bate, Brit. Mus. Catal. Amph. Crust., p. 255, pi. xliv. fig. 1. 

 1862. ,, „ Bate and Westwood, Brit. Sess. Crust., vol. i. p. 445, fig. 



1869. „ ,, Norman, Last Report on Dredging among the Shetland Isles, p. 285. 



1870. „ „ Boeck, Crust, amph. bor. ot arct., p. 168 (248). 



1876. „ „ Boeck, De Skand. og Arkt. Amph., p. 605, pi. xxvii. figs. 4, 7; pi. 



xxviii. fig. 2. 



1 Trans. Connect. Acad., vol. iv., July 1880, p. 270, footnote. 



