98 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



has prepared the following special account of the higher 

 Crustacea obtained on these expeditions : — 



Crustacea. 



The following species of Malacostraca have been 

 added to the fauna since the last report. Nearly all were 

 dredged off the S. end of the Isle of Man in the ' John 

 Fell ' expedition, from April 22 to 24, 1896. 



Podophthalma : — Portunus corrugatus (Pennant). — 

 S.E. of Calf Sound, 26 fathoms. 



Nika ediilis, Eisso. — Co. Down Coast (Ascroft) ; and 

 from stomach of whiting, 12 m. S. AY. of Chicken Rock, 

 33 fathoms. 



Schizopoda : — Erythrops serrata, G. 0. Sars ; 12 m. 

 S.W. of Chicken Rock, 33 fathoms. 



SirieUa armata (M. Edw.). Port Erin harbour, April. 



Cumacea : — Family LeuconidaB — Lcuconopsis, n. gen. 



Female with a distinct two-jointed appendage to the 

 fourth pair of feet, not furnished with natatory seta?. 

 Lower antenna? short, with the third joint conical, with a 

 minute one-jointed rudimentary flagellum. Rami of 

 uropoda subequal. 



Male with the third pair of feet each provided on the 

 second joint with a pair of curved blade-like processes. 



Remaining characters as in Leucon. 



Leuconopsis ensifer, n. sp. 



Female : — Carapace about as long as the free thoracic 

 segments, dorsal crest of fourteen teeth beginning about 

 the middle of the upper margin, and curving down to the 

 base of the rostrum ; a small tooth on the upper and near 

 the posterior margin ; lower margin with the anterior 

 half coarsely toothed, and forming with the anterior 

 margin an acute angle the upper portion of which is 

 finely toothed. Rostrum about quarter the length of 



