Hotifera of some Pacific Islands. By J. Murray. 431 



wedge-shaped, tapering from first segment to anal. Teeth 2. Foot 

 short, 4-jointed ; spurs large, broad, with small interspace, dotted ; 

 toes large. 



Length, when feeding, with the foot drawn in, 200 yu,; width of 

 corona 75 ll, trunk 65 ll, across spurs 30 ll. Sulcus about equal 

 to disk, collar prominent, lobes on upper lip reaching to level of 

 bridge, slightly separated by convex interspace. Rostrum short, 

 antenna less than half of neck width. Anterior trunk generally 

 wider than central trunk. Trunk regularly plicate. Pre-anal and 

 anal segments distinct, of equal length. Spur broad, blade-shaped, 

 slightly contracted midway and expanded again towards apex, 

 which is subacute. 



Not closely related to any other species. The spurs suggest a 

 relationship to some of the Enibata (B. laticeps, etc.), but there are 

 distinctly only three toes, which are large, like those of Rotifer. 



Hahrotrocha nodosa sp. n. Plate XV. figs. Sa-Sf. 

 Synonym Callidina cnnata var. nodosa Murray.* 



Specific Characters. — Small, whitish ; trunk covered with large 

 tubercles, in regular transverse and longitudinal rows ; teeth 

 many, fine ; foot short, three-jointed, a boss on the first joint ; 

 spurs small, obtuse or subacute. 



Length 220 fi-250 fx, width of neck 40 ll, trunk 65 fju, across 

 spurs 10 ll. Rostrum short, broad ; antenna three-quarters of neck 

 width ; jaw triangular, number of teeth uncertain, anterior thickest, 

 then diminishing rapidly to fine strise — seven or eight can be 

 counted. Disks, in creeping animal, small, not separated. Neck 

 smooth, rounded processes on each side of antenna. Tubercles 

 about 6-9 ll in diameter (largest in Indian examples), about three 

 rows in the length of each segment. Pre-anal segment tubercled ; 

 anal smooth, but with one pair of lateral tubercles (in Indian 

 examples all tubercled). 



The large tubercles appear to be constant, and sufficiently dis- 

 tinguish the species from all others in the genus. 



Habitat. — Fiji ; India ; Madagascar. First found in India, and 

 described as a variety of H. crenata (Murray). 



Hahrotrocha sp. ? Plate XV. figs. 9a-9c. 



Very small (140 ll in length), rostrum and antenna short. First 

 neck-segment the widest part of body ; neck and trunk behind 

 that of nearly uniform width. Jaw triangular, with many fine 

 teeth, diminishing. Spurs small, incurved. • An incomplete study, 

 but certainly distinct. It is a curious paradox that the " neck " 

 should be the widest part. I only know one smaller Bdelloid — 

 H. minata is much smaller, measuring only 77 ll in length. 



* See this Journal, 190G, p. 641, pi. xix. figs. 6a-5c. 



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