Fig. 
Fig. 
MOSS’S POLYSTIGMATIC APPENDICULARIAN. 69 
2. Kowalevskia tenws, Fol. An adult specimen, 
seen from the ventral side. Enlarged 15 times. 
(aAaver ol, Ve... Pl. Estey 1); 
3. Kowalevskia tenuis, Fol. A specimen not quite 
adult, seen from the right side. Enlarged 100 times. 
(After Fol, 1.c., Pl. X. fig. 5—the rudimentary ‘“‘ Haus,”’ 
however, omitted.) The signification of the letters 
is the same in figures 2 and 3. A, atrial apertures 
(gill-clefts). A.W., walls of the right atrial aperture. 
C.V., ciliated vesicle. D.R., dorsal row of ciliated 
processes of the right side. L.D.R., dorsal row of 
ciliated processes of the left side. M, muscle-bands 
of the tail, extending a short distance beyond the 
notochord on each side. N, notochord of the tail. 
N.C., nerve-cord. O, ovary. O.A., oral aperture. 
CH, esophagus. Ot., otolith. P, processes by which 
the rectum is attached to the body-wall. R, rectum. 
The anus is situated within the area occupied by the 
dark mass in the rectum. S, stomach. T, testis. 
V.R., ventral row of ciliated processes of the right 
side. 
Post-script.—In his just published ‘‘ Notes on the Struc- 
ture of Otkopleuwra”’ (Trans. Li’pool Biol. Soc. vol. 
VI. p. 40), Prof. Herdman suggests that Moss may 
have mistaken large glandular cells of the endostyle 
for stigmata @ la Sanders; but this theory would 
necessitate the existence of an endostyle of much 
ereater length than is presented by any other 
Appendicularian. 
