CRUSTACEA OF NORTHUMBERLAND AND DURHAM 273 



Section II.— MYSIDACEA 

 Fam. I.— SIRIELLID^ 



SiRIELLA NORVEGICA G, O. SarS. 



Young specimens between tidemarks at Alnmouth (G. S. B.) 



N. 

 SiRIELLA JALTENSIS Czcrniavsky. 



This is S. crassipes of G. O. Sars. Cullercoats (A. M. N.) ; 



St. Mary's Island, Craster, and Holy Island (A. Mk.) N. 



SiRIELLA ARMATA (H. Milnc-Edwards). 



This would appear to have been Mysis GnffithsicB of Bell 

 and Mysis producia of Gosse. 



Young specimens taken at Alnmouth (G. S. B.) ; Culler- 

 coats, St. Mary's Island, Alnmouth Bay, and Holy Island 

 (A. Mk.) N. 



Fam. 2.— GASTROSACCID.^ 



Gastrosaccus spinifer (Goes). 



Off the mouth of the Tees, May, 1866 (Mr. Davison fide 

 G. S. B.); Cullercoats (A. Mk.) N.D. 



Fam. 3.— LEPTOMYSID^ 



Mysidopsis didelphys (Norman). 



Forty to fifty miles off Tynemouth, 1862 (A. M. N.) N. 



Leptomysis lingvura G. O. Sars. 



Cullercoats and Seaham (A. M. N.) ; Whitburn (G. S. B.) ; 

 Cullercoats (A. Mk.) N.D. 



Fam. 4.— MYSID^ 



Hemimysis lamorn/e (Couch). 



Seaham, July, 1861 (G. H.); Cullercoats and Craster 

 (A. Mk.) N.D. 



Macromysis flexuosa (Miiller). 



Common ; tidemarks and shallow water. N.D. 



Macromysis inermis (Rathke). 



Cullercoats (A. M. N.); Sunderland (G. S. B.) j abundant 

 at Cullercoats, St. Mary's Island, and Craster (A. Mk.) N.D. 



