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



in this Synopsis, is referred to the genus Monoculodes, Stimpson. But in the Catalogue the 

 name Kroijera is retained for a genus thus defined : — " Cephalon produced and anteriorly 

 depressed. Eyes not coalesced into one. Superior antenna not appendiculate. First pair 

 of gnathopoda subchelate; carpus inferiorly produced along the inferior margin of the 

 propodos. Second pair chelate ; carpus produced along the inferior margin of the 

 propodos. Fifth pair of pereiopoda considerably longer than the preceding. Posterior pair 

 of pleopoda biramous. Telson squamiform, entire." Boeck spells the name as Kroyeria, 

 and then rejects it, as pre-occupied in a different group of Crustacea, in favour of his own 

 later name, Po7ifocrates. Kroyera having in fact lapsed as a synonym of Monoculodes 

 could not properly be revived, and must therefore yield to Fonfocrates, Boeck, unless it 

 should prove that Kroyera carinata has a right to be restored. See Note on J. Sparre 

 Schneider, 1885. 



" Subfamily V. Gammarides. The upper antenna not in advance of the lower, and never 

 rudimentary. Gnathopoda generally prehensile. Last pair of posterior pleopoda terminating 

 in two stylets which are more or less fringed with cilia." Genus 11. Darwinia : — " Pereion 

 inflated. Upper antenna without secondary appendage. All the feet terminating in simple 

 hooks, not subcheliform." This genus Boeck identifies with Lafystius, Kr0yer. Genus 

 15. Ccdliope, now CaUiojnus, is given from Leach, MS., and thus defined : — " Upper 

 antenna without secondary appendage. All the feet with strong semi-prehensile claws. 

 Telson single. Mandible palpigerous." Genus 17. Leiitbos : — "Upper antenna with 

 secondary appendage small. First gnathopod larger than the second. First of the 

 posterior pereiopoda very short, the last very long. Telson rudimentary." Afterwards 

 referred to Microdeidopus, Costa. Genus 18. Lonchomerus: — " Like Lcmhos. Meros of first 

 gnathopod produced into a long spine." Afterwards identified with Aai'a, Kr0yer. 

 Genus 19. Eurystheus : — "First gnathopod smaller than the second. Upper antenna with 

 secondary appendage. Telson cylindrical ; " recognised later by Spence Bate as belonging to 

 a special division of the genus Gammarus which Liljeborg established ; but the fact was not 

 recognised, as Boeck points out, that to this division Liljeborg gave the name Gammaropsis, 

 which therefore supersedes Eurysthe^is. Genus 20. GammareJla : — " Antennas like 

 Gammarus, and upper with secondary appendage. Last pair of pleopoda with a single 

 branch. Telson single." Genus 25. Thersifes : — " Upper antenna with second joint of 

 peduncle produced from the inferior side of the first. Second gnathopod terminating in a 

 brush. Telson double;" afterwards recognised as identical with Bathyporeia, Lindstrum. 



" Family IIL Corophiidse. With the segments of the pleon not fused together." Subfamily T. 

 Podocerides : — " The peduncle of the upper antenna much shorter than that of the lower. 

 Lower antenna very strong, and used in climbing. Last pair of pleopoda terminating in 

 short strong hooks." Genus 1. PZewjejrfe' .•—" Upper antenna without secondary 

 appendage. Peduncle of the lower antenna reaching nearly to the extremity of the upper 

 antenna. The gnathopoda subcheliform. Posterior jiereiopoda prehensile." Afterwards 

 referred to jl?H^7wV//oe, Leach. Genus 3. Sunampliitoe : — "Second gnathopod larger than 

 the first. Posterior pleopoda with one branch squamiform, the other terminating in two 

 hooks. Telson terminating in a single strong hook." This is doubtless the same as 

 Templeton's Anisopus, but the name Ariisojms, being pre-occupied, must yield to 

 Stmampltiflioe. 



" Family VIII. Dyopedidse. The last segment of the pereion and the last of the pleon absent. 

 Coxae of last two pereiopoda fused with the body of the animal." Genus 1. Dyopedos: — 

 " The sixth and seventh pairs of legs attached to the sixth segment of the pereion. The last 

 pair of pleopoda absent. Telson single." This was afterwards found to coincide with 

 Didiehia, Kr0yer, and Dana's name Dulichidee was therefore accepted for the family. 



