2938 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 
by their much smaller average size, contain a quite distinct species (1. 
giobosus) which is much smaller, subcircular, and with a much larger 
capsular index. 5 
55. Myxobolus lintoni Gurley, 1893. Pl. 26, figs. 7,8; pl. 27. 
(Psorosperms of Cyprinodon variegatus, Linton, 1891, Bull. U. S. Fish Com. for 
1889, Ix, pp. 99-102, pl. 35, figs. 1-16; ib. Braun, 1895, Centralbl. f. Bakt. u. 
Parasitenkde, x11, p. 97.) 
Myzxobolus lintoni, Bull. U. S. Fish Com. for 1891, x1, p. 414; ib. of Cypsinodon 
[error] variegatus Braun, 1894, Centralbl. f. Bakt. u. Parasitenkde, xv, 
p. 87. 
Cysts.—Apparently no closed cysts. Fungoid masses of an irregular 
shape, varying in size from 4 by 2°5 mmnn., to 10 by 4 mm., projecting 
as much as 3 mm. above general surface of skin. 
Myxosporidium unknown. ; 
Spore.—Shape and size very uniform; biconvex-lenticular, outline 
broadly rounded-elliptic, length 13-9 uu, breadth 11 jy, thickness about 8 
mg. Shell thick, showing under action of osmic and sulphuric acids a 
low longitudinal ridge, resisting the action of concentrated sulphuric 
acid and of potassium hydrate solution and a 10 days’ maceration in 
sea water; staining brown with iodine and deeply when treated with 
methyl green and eosin; collapsing under action of glycerin. Cap- 
sules 2, situated and converging anteriorly, pyriform, transparent, 
refractile, not staining deeply with methyl green and eosin, showing, 
with cosmic acid, a minute pore at anterior end; containing filaments 
which are extruded under the influence of sulphuric acid; filaments 
when extruded nearly straight, undulate, or more or less closely spiral, 
of the same thickness throughout, distal ends tenuate. Sporoplasm 
showing, on addition of acetic acid or after 8 days’ immersion in sea 
water, a “nuclear vesicle”; in many specimens showing the “ smaller 
supplemental refractile bodies” represented in pl. 27, fig. 2. Spore 
associated with calcareous particles of irregular shapes (fig. 14). 
The above is Prof. Linton’s description, condensed and rearranged. 
To it I am able to add, partly by way of correction, the following data: 
Spore.—Shell composed of 2 valves, superior and inferior; easily 
and rapidly separating in sulphuric acid (cold, concentrated); ridge 
present. Capsules extruding the filaments (alcoholic specimens) in a 
loose spiral or straight, under the action of iodine water. Sporoplasm 
showing, with iodine, a rather large vacuole with clearly defined borders. 
Nuclei, at the most, 4, 2 of which are the pericornual. 
These 2 specimens were also from the Atlantic, at Weods Holl, 
Mass.; collected by Mr. V. N. Edwards, August 1, 1892. 
Habitat.—Imbedded in the subcutaneous tissue of Cyprinodon varie- 
gatus (short minnow), taken in the Atlantic at Woods Holl, on August 
20, 1889; also August 1, 1892. 
Effects—The skin of the host overlying these tumors is more or less 
cracked and broken, and the scales scattering. 
