Mr. George Sim on Diastylis bimarginatus. 453 



with a transverse whitish band across the middle of the back 

 and a few white spots ; lower side yellow, with a few fine 

 teeth where it projects over the cephalothorax. 



Hab. Rangoon, Burmah. 



This species was found living in considerable numbers, 

 along with T. lutetpes (Cambr.) and a Pholcus, onboard a ship 

 in Liverpool, with rice from Eangoon. The female carrying 

 its egg-cocoon attached by short silken lines to the spinners, 

 as does a small British spider of the same genus {Theridion 

 himaculatum, Linn.). 



EXPLANATION OF PLATE XVIII. figs. 1 & 2. 



Fig. I. Pholcus Margarita : «, J , underside ; 6, $ , slightly enlarged ; 



c, front view of eyes and falces ; d, c? palpus ; e, $ epigynse. 

 Fig. 2. Theridion Thalia : a,(S , underside ; J, § ; c, J palpus ; d, epigynse, 



5 ; e, (S , side view ; /, $ , ditto. 



L. — Note on Diastylis bimarginatus ywm the Coast of 

 AherdeensMre. By George Sim. 



[Plate XVIII. figs. 3-5.] 



In reference to the above, as described and figured by Mr. 

 Spence Bate in the Ann. & Mag. Nat. Hist, for May last, 

 and which crustaceans were sent to him by me, I have to 

 say that both the description and figure of the Diastylis are so 

 defective and unlike the animal, that, were others of the same 

 species found and referred to the description and figure as 

 given by Mr. Spence Bate, the conclusion could not fail to be 

 arrived at that there was no relationship whatever between 

 the specimens found and those referred to by Mr. Bate. All 

 this I have already pointed out to Mr. Bate. 



The annexed figures are the result of numerous careful 

 microscopical examinations of the animal while in a fresh and 

 perfect condition, excepting, of course, the legs, which were 

 broken when the creature was found. 



The name Mr. Bate has given, viz. Diastylis himarginatusy 

 is happily chosen, being descriptive of the animal, and on 

 that account is cheerfully retained. 



In giving my description it will, I think, be better to put 

 those portions which differ from Mr. Bate's in italics, so that 

 the difference may be the more easily observed. 



Diastylis himarginatus. 

 The carapace long and cylindrical) the infero-lateral mar- 



