A REVIEW OF THE MYSIDACEA 139 



MYSIDOPSIS ANGUSTA G. O. Sars 



Mysidopsis angusta G. O. Saks, 1864, p. 254. 



Occurrence.— Off Start Point, Devonshire, England, identified by 

 G. E. Bullen. 



Distribution.— Coasts of England and Norway and the Mediter- 

 ranean Sea. 



MYSIDOPSIS GIBBOSA G. O. Sars 



Mysidopsis giobosa G. O. Sabs, 1864, p. 252. 



Occurrence.— Off Start Point, Devonshire, England, identified by 

 G. E. Bullen. 



Distribution.— Coasts of Norway, Denmark, England, and the Med- 

 iterranean Sea. 



MYSIDOPSIS ACUTA Hansen 



Eeference to this species may be found on page 244. 



MYSIDOPSIS BIGELOWI Tattersall 

 FlGUBE 50 



Mysidopsis bigelowi Tattersall, 1926, p. 10, pi. 1, figs, 1-8. 



Description. — Carapace (fig. 50, a) produced between the eyes into 

 a short low triangular rostral plate with a bluntly pointed apex; 

 anterolateral corners rounded. 



Eyes (fig. 50, a) of moderate size, cornea occupying less than half 

 of the whole eye in dorsal view; no fingerlike process on the outer 

 dorsal portion of the eyestalk. 



Antennal scale (fig. 50, b) five times as long as broad, narrowly 

 lanceolate, setose all around, without a distal joint, apex bluntly 

 rounded, extending beyond the peduncle of the antennule by about 

 one-quarter to one-third of its length, a prominent spine on the outer 

 distal corner of the joint from which the scale springs ; the distal joint 

 of the antennal peduncle only slightly more than half as long as the 

 preceding joint, the whole peduncle extending to about two-thirds of 

 the antennal scale. 



Maxillules (fig. 50, c) with a definite shoulder on the outer margin 

 of the outer plate proximal to which are a few spinules ; inner plate 

 with two setae. 



Maxillae (fig. 50, d) with the proximal lobe narrow; distal lobe 

 divided into two parts by a short furrow; palp long, distal joint nar- 

 rowly oval, nearly twice as long as broad and twice as long as the 

 proximal joint; exopod long and narrow, setae present only on its 

 outer margin and the distal setae much longer than the proximal. 



