636 DAVID BRYCE ON FIVE NEW SPECIES OF 



view they are seen to be curved and to enclose a concave area. 

 Whether bent rod or plate, the structure seems to be a support 

 for the high upper lip, and indirectly for the slender pedicels. 

 The under lip is only moderately prominent, but in lateral view 

 the sides of the mouth seem rather high. Behind the mouth I 

 saw several faintly marked annular plicae. The positions of the 

 mastax and of the brain and the looped gullet have been des- 

 cribed above. 



The short foot tapers rapidly and is about equal in length to 

 one-sixteenth of the whole body. On the dorsal surface of the 

 proximal joint, just behind the anus, is a strong thickening of 

 the hypodermic skin, conspicuous in lateral view when the animal 

 is extended. When feeding most of the foot is retracted within 

 the body, and the extremity is covered by the rump. When 

 the animal is crawling there is no slithering movement. The 

 antenna is of moderate size. 



Like many of its near relatives, this species is exceedingly 

 timid. When it ventures to display its corona it usually adopts 

 very curious positions. A favourite position is attained by the 

 animal bending the head and neck back until the corona nearly 

 touches the rump, and then turning the head half round so that 

 the corona presents a lateral and inverted view. Poses of this 

 character are frequently seen among tube-dwelling species with 

 long, slender necks, and it would not be surprising if H. insignis 

 should later be found to belong to this section, although no 

 tube-dwelling habit has yet been observed. It is, of course, 

 equally possible that it may have been a tube-dwelling species 

 in the past. 



An example isolated laid eggs of usual type, oval, smooth and 

 hyaline, and measuring 66 jx x 46 /x. 



My largest examples measured about 290 \x in length, the 

 rami 15 //,, the spurs 4 to 5 $x ; the corona about 20 /x wide, 

 and the collar about 26 fx. 



First obtained in ground moss from Baden (? Schwarzwald) 

 in 1894, and thereafter in moss collected by Mr. D. J. Scourfield 

 on Cader Idris in 1895; in moss from the top of Ben Vrachie 

 (Perthshire) in 1908 ; in liverwort collected by Mr. G. K. 

 Dunstall near Lynton (North Devon) in 1914, and in rock moss 

 from the summit of Snowdon (Wales), gathered by Mr. Lionel 

 Bennett in the same year. 



