C. lovqkorne var. Icevicorne, is evidently not at all a Cyiopliiiiin, but a true 

 S/plionoecefes. The remaining 2 species are C. Bonclli Edw. and C. erassi- 

 come Bruzel., both known also from the European coasts, and it is most 

 probable, that the form recorded by Dr. Marcusen as C. bidentatnm is 

 identical with the last named species, in which case only 2 species are met 

 with in the Black Sea. It was therefore rather unexpected to find this genus 

 very abundantly represented in the Caspian Sea, both as to species and in- 

 dividuals. On a closer examination of the rich material of Corophians col- 

 lected by Mr. Warpachowsky, I have been enabled to distinguish no less 

 than G different species, all of which are new to science, exhibiting well 

 marked differences from those earlier known. It will be shown below that 

 the species are rather easily distinguishable especially by the structure 

 of the inferior antenna', those of the male sex particularly exhibiting the 

 distinguishing characters very clearly pronounced. The Corophians are known 

 to be chiefly littoral and siiblittoral in their occurrence, living partly among 

 algiC, partly at muddy bottom, and in both cases constructing for themselves 

 a])odes of mud or other material for dwelling in. The same habits are also 

 to be stated for the Caspian species, and their inudd}- tubes are often found 

 together with the specimens, in several cases containing within them the 

 animal in its original position. 



23. Corophium nobile, G. 0. Sars, n. sp. 



(PI. X}» and XXI). 



Specific Characters. — Cephalon angularly produced between the bases 

 of the superior antennio, lateral corners narrowly rounded. First pair of 

 coxal plates densely clothed with slender, partly ciliated setm. All the seg- 

 ments of urosome distinctly defined. Superior antenuie very slender and 

 elongated, exceeding in male half the length of the body; peduncle, especi- 

 ally in the male, densely setiferous, its 1st joint having in both sexes 2 dis- 

 tant spines on the lower edge, flagellum in male exceeding the length of the 

 peduncle. Inferior antennae in male very strongly developed, equalling in 

 length about % of the body, penultimate joint of the peduncle rather large 

 and tumid, being produced at the end posteriorly to 2 somewhat diverging 

 unguiform projections, the outer of which is the larger, last joint somewhat 

 shorter than the penultimate one, and having above the middle a short spini- 

 form prominence, but no spine at the end. Inferior antenure in female much 

 less strong than in male, but of a similar structure, though the projections of 

 the penultimate peduncular joint are smaller and less divergent. Gnathopoda 

 of the structure characteristic of the genus. Anterior pairs of pereiopoda 



'^Il3.-MaT. c-rp. 200- I 8 



