216 ANNALS OF SCOTTISH NATURAL HISTORY 



small cones standing far apart, about i 7 in the circumference, 

 Gullane Links. 



M. ornatits, Richters ? A form agreeing with this species as to 

 pharynx and claws, but with the skin perfectly glabrous and 

 without spines, occurred at Fullarton, Winchburgh, and Thorn- 

 ton. This variety is connected with the type by Richters' 

 var. verrucosus. 



M. macronyx, Doy. Upper Elf Loch, Largo, and Marl Pit at 

 Davidson's Mains. The furca of the tooth is very large. 



M. macronyx, var. ? (Figs. 20. to 2d}. Near Roslin, in March, Mr. 

 Evans found an animal which would technically be called a 

 Diphascon, but which has claws exactly like those of M. 

 macronyx. It is a simplex form, having teeth without furca or 

 bearers, and an elongate flexible gullet. As such forms are 

 useful to indicate the affinities of the genera and species, it is 

 here figured. The pharynx has rods sufficiently like those of 

 M. macronyx, but is rounder. 



Genus DIPHASCON 



D. angustatum, Murray. In damp moss, Thornton, Fife, December 

 1905. A simplex form, the first seen for this species. The 

 gullet is a good deal longer and narrower than in the type. 



D. oculatum, n.sp. (Figs. \a to ir.) Specific characters. Large, 

 narrow, broadest in middle. Two dark eye - spots. Teeth 

 curved, with bearers ; gullet very long, slender ; pharynx 

 nearly round ; thickenings two short oval bodies and at 

 posterior end a little round nut (what Richters calls a 

 " komma "). Claws, a short thick pair, and a pair with one 

 very long claw apparently springing from the middle of the back 

 of the shorter claw, long claw with a fine spine near the apex. 



It is the first species of the genus found possessed of eyes, 

 and is named from that peculiarity, although the character is 

 somewhat unstable in the genus Macrobiotus. If we suppose 

 it without eyes or flexible gullet (both somewhat untrustworthy 

 characters) it would still be distinguishable from any species of 

 Macrobiotus having similar pharynx, by the structure of the 

 claws. The lower portion of the long claw sterns to be less 

 firm than the upper part. This is indicated (Fig. \c) by shading 

 the firmer portion. There is a little thickening at the end of 

 the gullet in the pharynx in addition to those enumerated in 

 the description. Six eggs, in a very early stage of develop- 

 ment, are seen in the body. Total length 347/z, pharynx 

 33^ x 26 p.; long claw (from base of pair) 21 /a. 



Hopetoun Woods, Linlithgowshire, 2nd December 1905 

 (W. Evans). 



