Canon A. M. Norman on Biitiah Isopoda. 435 



besides is to be seen, only a small triangular portion at the 

 back and a little piece at the rostrum (see lig. 2). ]\Iore- 

 over, the eye so overhangs the front that this rostral portion 

 is hidden when the jEga is viewed from above. The entire 

 surface of the body is closely microscopically punctated, 

 presenting under the microscope a shagreened appearance, 

 besides which there are scattered punctuations of much larger 

 size. The hind margins of the segments of the metasome 

 are beaded (as in ^ga monophthalma) ; the teiininal segment 

 is well rounded at the extremity, its margin serrated and 

 ciliated, its surface covered with minute spinules. The 

 superior antenmc have the joints of the })eduncle cylindrical. 

 The coxal plates of the first segment of the mesosome are 

 absent ; those of the three following segments are oblong in 

 form and abruptly truncated at their extremity ; those of the 

 following segments are more produced, their extremities 

 blunt ; nor are the epimera of the metasome sharply pointed. 

 The three anterior pairs of legs (see fig. 5) are almost entirely 

 devoid of spiny armature. The inner uropods are very broad, 

 widely truncated distally, with tiie outer corner slightly 

 produced, and are without any emargiuation of the outer 

 side ; both pairs of uropoda are serrated. 



Length 13 nmi. 



A single female taken by the ' Porcupine/ 1870, 8 miles 

 N.W. of Cape ISagres, Portugal^ in 45 fatlioms. 



Genus 2. Rocinela, Leach. 

 = A chcnisia, Lucas. 



1. Bocincla danmoniensis, Leach. 



1851. yEV/« rotundicauda, Lilljeborg, ''Norges Crustaceer," Gifvers. K. 



Vet.-Akad. Forhaiidl. p. 23. 

 1867. liocintla danmonicnsis, Bate & Westwood, /. c. vol. ii. p. 291. 

 1873. ALya nasuta, Norman, in Wyville Tliomson's * Depths of the 



Sea,' p. 127, woodcut. 

 1879. Rocinela dunmoniensis, Schitidte & Meinert, I, c. p. 383, pi. xi. 



tigs. 1-lG. 

 189U. Rocinela danmoniensis, II. J. Hansen, I. c. p. 298, pi. x. figs. 1-1 n. 

 1897. Rocinela danmoniensis, G. O. Sars, /. c. p. Uo, pi. xxvii. 



Lat. 60° 39' N., long. 3° 9' W., 203 fathoms, and hit. 

 60° 45' N., long. 3° & \V., 250 fathoms, /. e. west of the 

 Shetland Isles (' Porcupine,' 1869, Stats. 74, 75). 1 have 

 taken it on the West Norwegian coast in the Bergen and 

 Hardanger Fiords. 



The next species is very closely allied to the present; the 

 chief point of difference is that in R. danmoniensis the eyes 



