230 ANNALS OF SCOTTISH NATURAL HISTORY 



form with a little black pigment on the rhinophores and 

 branchiae. The second had a small tubercle on both the cerata 

 and one extra velar process. While in the third the cerata 

 were situated almost behind the branchiae and were joined 

 at their base. A specimen taken a week later had a large 

 amount of black pigment on the body ; the tubercles coloured 

 bright orange as in Triopa and the branchiae almost black, 

 tipped with pale lemon. One of the cerata bore two 

 small processes. After noticing these variations I examined all 

 the Polyceras we found ; out of 2 6 examined 1 7 had yellow 

 and black pigment on the angles of the foot and rhinophores, 

 the others having only yellow pigment, except one which had 

 no pigment. The branchiae varied in number from 5 to 9, 

 7 being the usual number ; in 8 the cerata were branched 

 or bore small processes, in 10 the cerata differed from each 

 other in size or shape; the velar processes varied from 4 to n, 

 4, the normal number, occurring 1 9 times ; the tubercles varied 

 in size, number, and colour. 



In June 1907 several specimens taken near Farland Point 

 were very pale, had few coloured tubercles, cerata developed 

 into slightly branched flaps and several extra velar processes. 



From specimens examined at Plymouth and Millport, I 

 think specimens from the laminarian waters show least variation, 

 this being their typical habitat. Sp. Sep. on Laminaria. 



I am indebted to Mr. Wm. Smith for the excellent figure 

 of the variant form described above. 



ON THE SCOTTISH SPECIES OF OXYURA 

 (PROCTOTRYPID^}.?A.WI III. 



By P. CAMERON. 

 (Continued from p. 161, No. 63, July 1907.) 



PROCTOTRYPIN^; 



THE British species of Proctotry pines were monographed by 

 A. H. Haliday in a small pamphlet published in London 

 in 1839, under the title " Hymenoptera Britannica 

 Oxyura," fasc. i., 1 5 species being recorded from Britain 

 including 2 from the neighbourhood of Edinburgh, namely, 

 P. longicornis, p. 9, and fuscipes, p. 13, neither of which 

 have been identified by Dr. Kieffer among my specimens. 



