POLYC'H.^TA OF THE L.M.B.C. DISTRICT. 135 



a black band extending niedianly from head to tail, being 

 edged with a pale uncoloured margin on either side. 



Theel is correct in saying that only the largest indivi- 

 duals possess on the scales any notable romided processes 

 and I cannot imagine how so able a naturalist as Mobius 

 could for a moment confound the species in question with 

 P. impar. Indeed the giobosely tuberculated elytra of 

 P. imbricata approach much more closely to those of 

 P. pwpinqua, but otherwise the differences between these 

 two are striking. (PL XIII, fig. 2). 



PolijJio'r (Harmotho'i') halueti, (M'Intosh), var. hijceme, n. 



Hab : Port Erin, Isle of Man, 15 fms. 



The specimens described by Mr. Gibson (loc. cit.) 

 unfortunately wanted the scales, but in one recently 

 obtained ("Hyaena" cruise of Easter, 1889) a few scales 

 were present. These differ considerably from Professor 

 M'Intosh's description.* Instead of the margin being 

 " quite smooth throughout," it is densely fimbriated 

 after the manner seen in Lepidonotiis sqicamatus other- 

 wise they agreed closely with the characters given. (PL 

 XIII, fig. 5). 



* Poly nor (Evarne) impar, Johnston. 



Hab : 10, 12, S, H, L, P. From httoral to 22 fms. 



The number of large jDear shaped tubercles on the 

 margin of the scales varies greatly, but few have so many 

 as Malmgren gives in his figure. Many have only one 

 very large one, others none whatever, while again a few 

 of the largest approach Malmgren' s engraving — having 8, 

 4, 5, and 6 tubercles. The number varies even on 

 adjacent scales of the same individual — some with none, 

 others overlapping these with one or more. A number of 

 the largest of these remarkable processes are made even 

 more so by the presence on the broad summit of numer- 



* " Challenger" Report, p. 9t). 



