ANOMALOCERA. 77 



of the first abdominal segment of the female (fig. 

 11) is produced backwards forming a rather slender 

 spine of about half the length of the second segment ;* 

 the third segment has a gibbous projection of the 

 dorsal margin. Caudal segments in the female un- 

 equal in size, about once and a half as long as broad 

 (fig. 12) ; in the male (fig. 13) slender and elongated, 

 about four times as long as broad. Caudal setas 

 scarcely as long as the abdomen, stout and plumose. 

 The rostrum is stout and furcate, the median eye 

 stalked (fig. 2), and forming a conspicuous dark- 

 coloured blue or brown globe ; the lateral eyes (fig. 

 14) consist each of two comparatively small trans- 

 parent circular lenses situated near the base of the ros- 

 trum. Length Y^-ths y^jths of an inch (3 6 mm.). 

 In colour A. Pater sonii varies much ; it is seldom with- 

 out some trace of yellow and blue colouring, but not 

 unfrequently the tints are so vivid and varied as to make 

 the little animal quite a gorgeous object under the 

 microscope. The representation of these varied hues 

 given in fig. 1 is by no means exaggerated, and was 

 drawn with as much accuracy as possible from one of 

 many such specimens taken off Shetland by the 

 Rev. A. M. Norman. It may be noted that in the 

 antenna3 and abdomen blue generally prevails, but 

 over the body various shades of red, yellow, and 

 green. 



Anomalocera Patersonii is generally distributed over 

 the Atlantic and the North Sea, as well as in the 



* I have never been able to find the spine, which is said by Dr. Glaus 

 to exist on the first segment of the male abdomen. 



F 



