290 Transactions 0/ the Society. 



several warts ou pre-anal and anal segments ; foot 4-jointed ; spurs 

 divergent, acuminate, obtuse. Teeth 4. Rosette at mouth. 



Length 350 ll, creeping; contracted 225 /x by 130 fi. The 

 prominent collar is as wide as the corona, its lobes on the upper 

 lip not as high as the bridge; neck also prominent, antenna as 

 long as neck width. First trunk segment of characteristic and con- 

 stant shape ; whole integument of trunk leathery, prettily wrinkled, 

 and scarcely altering in shape as the animal moves. Warts on the 

 f( >ot as in C. papillosa. 



Related to C. papillosa, the chief difference lies in the great lateral 

 projections of the second trunk segment, which make this part 

 often wider than the central trunk. These projections are hollow, 

 but the skin is thickened at the summit, forming a wart. There 

 are no other warts on the anterior or central trunk, except two at 

 the posterior angles of the central. Very abundant in British 

 Columbia, it appeared constant in these characters. 



Callidina multispinosa (Thomp.). Plate VII. figs. 6-9. 



Several forms occurred, some of which would be considered as 

 distinct species, were they not linked by intermediate forms. 



Variety (Plate VII., fig. 6). — Bearing very long setae with 

 bulbose bases, and large stout curved spines. On each side five 

 long setse on the anterior trunk, one pair near the median line of 

 the second segment. At widest part of central trunk a transverse 

 dorsal series of stout curved horn-like spines, in three pairs. 

 Thick knobs at posterior angles of central trunk and pre-anal 

 segment. On the foot two short lateral setae with bulbose bases, 

 and a number of dorsal conical processes. 



Variety (Plate VII., fig. 7). — Bearing very long setse and short 

 spicules. Five pairs of setae on the anterior trunk, as in the last 

 variety. Two lateral setae, with thick bases, on each side of central 

 trunk, and a thick sublateral spine. Dorsal row of spicules (four 

 pairs) at widest part of central trunk, and row of three pairs at 

 posterior border. No lateral setae on foot. 



The long lateral setae on the central trunk are the most unusual 

 feature of this variety. 



Variety (Plate VII., fig. 8). — Bearing long setae and ligular 

 processes. On the first trunk segment one small ligular process 

 and one long seta at each side. On the second segment, at each side 

 one long seta with thick base, one large curved ligular process, and 

 one conical process (almost in the angle between first and second 

 segments). On central trunk, at each side one long seta, one large 

 ligular process, and one knob at posterior angle. No dorsal trans- 

 verse series, no lateral setae on foot. Conical processes on foot. 



The peculiarity of the variety is the intermixture of ligular and 

 setiform processes. 



Variety. — Processes mostly ligular (Plate VII. fig. 9). On first 



