Land, Fresh- Water, and Marine Crustacea. 101 



Among the Cirripedia mentioned, one species — Balanus 

 tintinabulum — is, as stated by the authors, "an inhabitant 

 of the warmer seas, and its occurrence in the Forth is an 

 accidental circumstance." 



Among the Amphipoda, Caprella lobata, 0. F. Miiller, is 

 now regarded as synonymous with Ca.prella linearis (Linn.). 



Among the Isopoda, Arcturus (or Astacilla) gracilis, 

 Goodsir, is considered by G. 0. Sars to be the young of 

 A. longicomis (Sow.). 



Among the Cumacea, Cuma Edivardsi, Goodsir, has been 

 shown to be synonymous with C. scorpioides (Montagu). 



Among the Schizopoda, Cynthia Flemingi, Goodsir, is con- 

 sidered by Canon A. M. Norman to be probably identical with 

 Leptomysis lingvura, G. 0. Sars, and Themisto brevispinosa, 

 Goodsir, to be probably the male of Mysis (Macromysis) 

 flexuosus (Mull.). 1 



Themisto longispinosa, Goodsir, Canon Norman is unable 

 to identify — the description being insufficient. 



These and similar changes in arrangement and nomen- 

 clature are, however, incidental to the more accurate know- 

 ledge we now possess concerning the animals themselves, 

 as well as concerning the discoveries and writings of the 

 earlier authors, but notwithstanding these changes, the 

 work referred to is still indispensable to those who wish 

 to become acquainted with the natural history of the Forth 

 estuary. 



Contribution by Dr J. E. Henderson. 



A further contribution to the natural history of the estuary 

 was made by Dr J. K. Henderson, in a paper read before the 

 Eoyal Physical Society of Edinburgh in December 1884, 

 entitled, " Eecent Additions to the Invertebrate Fauua of the 

 Firth of Forth." The number of species previously recorded 

 was considerably increased, and as Dr Henderson's attention 

 had been devoted chiefly to the Crustacea, the largest number 

 of the additions occurred in this group. They are as 

 follows : — 



1 Cf. Ann. and Mag. Nat. Hist., Sept. 1892, pp. 245 and 251, footnote. 



