The Zoologist — August, 1873. 3639 



Pycnogon and Nymphon. Although colour is very inconspicuous 

 at present in this Phyllosoma stage of the crayfish's existence, it is 

 not altogether absent, two dark pigment spots marking the position 

 of the eyes on their long footstalks, while in many individuals the 

 more prominent joints of their slender legs may be seen in 

 favourable lights to be delicately banded with bright orange or 

 vermilion. The habit of lying with its legs extended at the surface 

 of the water, which is attributed to Phyllosoma as encountered in 

 the Atlantic and other seas, seems to be acquired only at a later 

 period of its existence. The singular form and structure of its body 

 and radiating limbs fit it remarkably for this mode of life, and a 

 somewhat similar adaptation of means to the same end is met with 

 in Gerris and Hydrometra among the heteropterous Heraiptera. 

 In the typical invertebrate series of the Museum of the Royal 

 College of Surgeons are some remarkably fine tropical Phyllosomae, 

 several inches in length, which, while they yielded the highest 

 amount of interest and gratification during examination, puzzled 

 me to no small a degree as to the manner in which they should be 

 mounted to illustrate their singular forms to best advantage. The 

 difficulty was met by sewing their bodies with fine silk to a thin 

 plate of talc, each attenuated appendage being fixed in place by 

 the same means. On the whole being immersed in spirit in the 

 glass selected for their reception, the fluid rendered the talc per- 

 fectly invisible, while the shape and structure of the Phyllosomas 

 were most satisfactorily exhibited. — Reprinted from the ^ Field'' 

 of July 19, 1873. 



[It is with extreme pleasure that I have read these additions to our 

 knowledge of living marine animals, a subject on which we have been so 

 long and so lamentably ignorant. Mr. Kent is in an excellent position for 

 acquiring knowledge of this kind, and these contributions exhibit him not 

 only as a careful observer but an able recorder of observations, two of the 

 most essential qualifications of a naturalist, — Edward Newman.] 



Supposed Ideutity of lakes Tanganyika and Albert Kyanza. — " I have 

 further a most important geographical discovery to communicate, one which 

 cannot fail, I think, to astound many scientific men in England. It is 

 declared as an ascertained fact by the returning party that lakes Tanganyika 

 and Albert Nyanza are proved to be one and the same water : the length of 

 this magnificent inland sea, thus for the first time made known to mankind, 



