MYSIS SPINULOSUS. 
Fig. 4-6. 
M. lamina centrali caudae bifurcata; rostro obtuso, longitudine trientem pedunculi oculorum 
aequante. 
Mysis spinulosus, Leach, Tran3. Linn. Soc. XI. p. 350, Desmarest , Edwards, &c. 
Mysis Leachii et My r sis Chamoeleon, Thomson, Bell , &c. (postea, Ed.) 
Fig 1 . 4, Mysis spinulosus, Mag-, auct. 5, cauda. 0, pes duplicatus quintus. 
The present editor believes that Professor Bell, persuaded as he was of the identity of Leach’s 
species with the M. Chamoeleon of Thomson, ought to have followed Desmarest, Edwards, &c. in 
retaining Leach’s name. The reason given for departing from the law of priority in this instance, 
namely, that the term <f spinulosus” applies to other species of the genus, is quite insufficient. The 
species has the middle joint of the tail bifurcate. 
MYSIS INTEGER. 
Fig. 7, 8. 
M. caudex lamina centrale lanceolata, apice integro ; rostro brevi, longitudine trientem pedunculorum 
oculorum aequanti. Squama antennarum testam longitudine oequanti. 
Mysis integer, Leach, — ? LIS. Mus. Brit. 
Mysis vulgaris, Thomson , Zool. Besearches, p. 30, t. 1, Edwards , &c. 
Fig. 7, Mysis integer. 8, cauda. 
Professor Bell having been able to quote Dr. Leach’s description of this species shews it to 
have been published somewhere, although we do not know in what work. The specimen in the 
British Museum named in Dr. Leach’s handwriting, has the peculiarity mentioned as distinguish- 
ing M. vulgaris from M. spinulosus, namely, that the middle flap of the tail is single-pointed and 
not divided into two lobes. 
