184 MR JAMES MURRAY ON 



contains jaws of a different type. These differences sufficiently separate the two 

 species. 



The figure accompanying this description has been drawn by my friend, Mr F. R. 

 1 'ixon-Nuttall, with his accustomed skill from my mounted specimen. 



Philodina flaviceps, n. sp. By David Bryce. 

 (Plate I. figs, la to 1/.) 



Specific characters. — Of medium size (about 320 /*), and only moderately stout. 

 Skin smooth. Corona rather ample (about 70 m), about one-fourth more than collar. 

 Rami with 2/2 teeth. Foot of four joints, moderately stout. Spurs, short thick cones 

 (about 6 m long), held nearly parallel, separated by a concave interstice (3 m wide). 

 Toes four. 



This species was very abundant in washing of Lemanea (Sacheria) gathered in 

 Loch Vennachar in May 1902 by Mr James Murray, and has occurred later in 

 gatherings from other waters sent to me by him from time to time. Its distinctive 

 features are the shortness and thickness of the spurs, the marked concavity of the 

 interstice, and the rather ample expanse of the corona, whose width equals quite one- 

 fifth of the length of the animal. Moderately grown examples might perhaps at 

 first sight be taken for P. nemoralis, but attention to these details will sufficiently 

 establish the identity of this species. Most of the examples seen were noticeable for 

 their clear yellow tint, and especially because the colouring was not confined to 

 the trunk, or central portion of the body, but extended over the neck and head 

 as far as the rostrum. This deviation from the general rule has suggested the 

 specific name. 



The antenna was of moderate length, and the mastax and other organs were 

 apparently normal. 



Although the animal seems to favour a habitat in open waters, specimens confined 

 in a small cell showed themselves fairly hardy, and produced eggs somewhat freely for 

 the first few days. These were approximately oval in outline, inclining to the Citrina 

 type, the smaller pole being distinctly less obtusely rounded than the greater, and in 

 one instance rising to a low knob-like prominence. One of these hatched out within 

 seven days after extrusion. I observed that several adults crawling about were con- 

 stricted at the third cervical segment. In confinement they soon settled down, and 

 thereafter were loth to shift their quarters. Some examples seemed to remain for days 

 together without changing their place. While feeding, the body was in incessant 

 movement, swaying to right and to left, raising itself more or less upright, or lowering 

 itself to a nearly prone position, whilst ever retaining its foothold. 



The eggs measured from 65 n to 70 m in length, and from 48 /* to 54 u 

 in width. 



