EEPORT ON THE AMPHIPODA. 333 



wliicli Spenco Bate in a note, page 104, remarks that Gratia pugettensis may belong to the 

 genus (Edicerus, certainly not to Iphimedia, in wkich Dana had placed it. 



Westwoodilla hyalhm, n. s., seems to me not distinguishable from Westwoodilla cuicula, Speuce 

 Bate j " Monoculodes Stimpsoni" I should have been inclined to unite with Moiwculodes 

 carinatus, Spence Bate, but that J. S. Schneider keeps them distinct. Spence Bate in his 

 appendix sinks the name Monocidodes stimpsoni in favour of Monoculodes affirm, 

 Bruzelius, Boeck makes Monoculodes carinatus, Spence Bate, = Monoculodes affinis, which 

 G. 0. Sars thinks very doubtful. Schneider accepts Spence Bate's second thoughts. 



Amphilochus, new genus, is thus defined: — "Cephalon produced, anteriorly depressed. Eyes two> 

 posterior to the superior autennte. Superior antenna not appendiculated. Gnathopoda 

 subchelate ; in both, the carpus is inferiorly produced. Pereiopoda subequal ; coxae of the 

 third pair not so deep as the preceding. Posterior pair of pleopoda double-branched (1). 

 Telson single." 



"This genus is distinguished from Monoculodes by having two eyes situated laterally, from 

 Kroyera by having the second pair of gnathopoda not chelate, and from both by the 

 shortness of the posterior pair of pereiopoda." 



Boeck accepts the name of this genus, but suggests that it ought to be changed as being 

 preoccupied among the Coleoptera, but the name to which he refers is, according to 

 Scudder, differently spelt, Amphilocus. ITie third uropods are in fact double-branched. 

 The type species of the genus is Ampldloclius manudens, n. s. 



" Urothoe Bairdii, n. s." is a synonym of the earlier UrotJioe norvegica, Boeck, 18G0; Urothoe 

 hrevicornis, n. s., as suggested in the Brit. Sess. Crust, i. 198, is not distinct from Urothoe 

 marinus, Spence Bate. 



Liljehorgia, new genus, is thus defined : — " Cephalon not much produced. Pereion long, 

 slender, and compressed. Inferior antennte longer than the superior. Coxae not deeper 

 than their respective segments. Gnathopoda resembling each other in form ; second pair 

 larger than the first, subchelate ; carpus continuous with the propodos, and produced 

 anteriorly along its inferior margin. Pereiopoda having the dactyla styliform. Posterior 

 pair of pleopoda biramous. Telson single, entire," 



" This genus is distinguished from Urothoe by the large gnathopoda, small coxie, and the form 

 of the telson." 



The type of this genus is Gammarus picdlidus, Spence Bate, 1855. Boeck established a genus 

 Idiina in 1860, which is synonymous with Liljehorgia, but though prior yields to it, the 

 name Iduna being preoccupied. It should be noted that the telson, described as entire, is 

 in reality deeply cleft. 



"Phxth-a Kinaliani, n. s." Boeck thinks may belong to the genus Liljehorgia. Lysianassa 

 spinifera (Stimpson, Mar. Invert. Grand Mauan, p. 49) is not mentioned in the index, but 

 the description is quoted under the genus Phxdra, with the remark that it " seems to be 

 closely related to this genus, only differing from it, apparently, in the telson consisting of 

 two long spines." 



Otus, new genus, the name of which being triply preoccupied, was changed by LiUjehorg into 

 Odius, is thus defined : — " Cephalon produced anteriorly. Pereion distended. Pleon 

 compressed. Antennte simple, subequal. Mandibles having an appendage. Maxillipeds 

 unguiculate. Ischium having a broad plate nearly as long as the four succeeding joints ; 

 bases furnished with a long narrow process. First pair of gnathopoda chelate ; second sub- 

 chelate. Pereiopoda short, robust, strong. Posterior pair of pleopoda biramous. Telson 

 single, squamous." 



"This genus differs from Iphimedia in the form of the maxillipeds, in the distinctly chelate 

 character of the first pair of gnathopoda, and in the larger relative proportions of the' 

 second." The type species is Otus carinatus, n. s. 



