REPORT ON THE AMPHIPODA. 1155 



besides uniting PJatophium and Cyrtophium, Cratophium and Podocerus, Erichthonius, 

 Cerapodina and Cerapus; to the subfamily Coropkiides he gave the genera Cyrtophium, 

 Cratippus, Dryope, Unciola, Corophium, Clydonia, Icilius. The definition of the 

 subfamily Corophiides by Hate and Westwood is given in the British Sessile-eyed 

 Crustacea, vol. i. p. 478 (1862), although the name Podocerides is given by an acci- 

 dental error at the head of several of the following pages. In 1870 Boeck made the 

 Coropkinae tke twenty-tkird 1 subfamily of the Gamrnaridae, placing in it the genera 

 Corophium, Siphonacetus, Glauconome, Hela. In 1872-1876 Boeck made the Coro- 

 phidse tke eigktk family of tke Gammarina, with two subfamilies, tke Coropkinae for 

 tke genera Corophium, Siphoncecetes, Glauconome, and tke Helainae for tke single genus 

 Hela. 



In 1880 Nebeski gives to tke " Coropkiiden " two subfamilies, 1. tke Podocerinae, 

 containing Amphithoe, Podocerus, Microdcutopus, Microprotopus, Cerapus, and by 

 implication Ericthonius; 2. Tke Coropkinae, witk tke single genus Corophium, Of 

 tke family ke gives tke following account : — 



" Tke Crustacea tkat belong to tkis family form a group skarply defined, as well 

 morphologically as biologically. Tkey are in general ckaracterised by kaving tke body 

 little compressed laterally, by tke powerful lower antennae, in wkick tke peduncle has 

 joints of considerable strengtk and generally far surpasses tke flagellum in lengtk ; a 

 furtker very important character lies in tke possession of tke glandular apparatus in 

 tke tkird and fourtk tkoracablimbs [first and second peraeopods], of wkick tke finger is 

 always perforated, affording an exit for the secretion." On tke ground of tke absence 

 of tkis last ckaracter ke excludes tke genus Cyrtophium, as represented by Cyrtophium 

 darwinii, Spence Bate, from tke Coropkiidae, and suggests its transference to tke 

 Dulickiidae. 



In tke same year S. I. Smitk instituted tke subfamily Cerapinae, of wkick tke 

 definition kas been already quoted, see Note on S. I. Smitk, 1880 (p. 522). In tkis ke 

 placed tke single genus Cerapus, giving notes at tke same time upon Ericthonius and 

 Unciola, but witkout stating wkat subfamily ke tkinks tkey ought to stand in. 



Cams in 1885 adopts tke family "Coropkiidae, Dana" for two subfamilies, tke 

 " Coropkinse (Dana) Cls., " witk tke genera Cratippus, Corophium, Icridium, and tke 

 " Podocerinae, Cls., " witk tke genera Cerapus, Microdcutopus, Microprotopus, Podocerus, 

 Grubia, Amphithoe. Tke arrangement by Gerstaecker in 1886 kas been already 

 explained; see Note on Gerstaecker 1886 (p. 580). 



In 1882 G. 0. Sars, dropping all subfamilies, places in tke family Coropkiidae tke 

 genera Corophium, Siphoncecetes, Cerapus, Unciola, Helella \_Neohela~\. 



1 In Boeck's work it is numbered " XXII.," the error arising from the circumstance that he gives the same number 

 " XVI." both to the Ampeliscinaj and to the Leptocheirina;, and numbers the subfamilies consecutively from the Lepto- 

 cheirina? onwards. 



