NATUKAL HISTORY NOTES FROIM TAKBERT. 375 



downward and outward from the blunt - pointed 

 apex for about J of the length, the remammg 

 part being nearly parallel with the narrowed base 

 of the inner edge. Second and third segments 

 of jDereion very short, subequal; fourth rather 

 longer and narrower ; fifth about the same length 

 as the first, rather narrower than last ; sixth 

 rather longer than fourth, depressed backwards 

 and extended laterally so that the jDOsterior edge 

 is somewhat hollow. Pleon, excluding tail append- 

 ages, about I of the whole length (J of whole 

 length if tail appendages be included), dorsally 

 depressed ; segments nearly equal in length and 

 breadth, but rather narrow posteriorly, and about 

 half as broad as pereion. Telson somewhat tri- 

 angular (but not so much as that of A. maxillaris), 

 slightly longer than lateral appendages. 



In other resx:>ects this specimen somewhat resembles 

 A. inaxillaris ', and but for the very marked differ- 

 ence in the shape of the mandibles, it might be 

 considered a form of that species. Should it prove 

 to be new, I would propose Normani as its specific 

 name, as a recognition of kind assistance given 

 at various times by the Rev. Canon A. M. Norman, 

 F.L.S., &c. 



Tanais vittatus, Kathke.— One striking feature in 

 this species is the dense fascicles of hair which 

 clothe the second and third segments of the pleon. 

 It is of frequent occurrence here among the clusters 

 of Balaiii that cover the rocks above low- water 

 mark. From what I have observed of its habits, 

 I am inclined to believe that it preys on the 

 Balani. In a i)aper entitled Dredging Notes from 

 the Bay of BotJiesay, read before this Society on 

 31st May, 1870, this species is said to be frequently 

 found in the tufts of Cladophora riipestris.^' ^ It 

 is stated that "when disturbed they escape and 

 will sirring to a considerable distance. This is 



* Proceedings, Nat. Hist. Soc. Glasg., ii. 50. 



