BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
EXPLANATION OF THE PLATE. 
ABBREVIATIONS. 
brs. Copulatory bursa, ov dt. Oviduct. 
dt. ej. Ductus ejaculatorius. pe. Penis. 
gl. sh. Shell gland. ut. Uterus. 
gl. pr’st. Prostate gland. va. df. Vas deferens. 
go'po. Gonopore. vag. Vagina. 
mu. ret, Retractor muscle. x. Vesicule seminales, 
object. 
Fig. A: 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 7. 
r Bige 0, 
Fig. 9. 
Fig. 10. 
Fig. 11, 
The lines adjacent to the Figures 1, 2, and 4-7 indicate the natural size of the 
Dendrocoelum lacteum. From life, X 4. 
Planaria maculata. From life, « 6. 
P. maculata. Head end, to show the occurrence of the light median streak. 
From life. 
Planaria dorotocephala, sp. nov. From life, X 7. The line at the left of 
the figure indicates the natural size of the colored part of the figure 
only. 
Planaria gonocephala. From life, X 5. 
Mesostoma ehrenbergii, showing young worms in the left uterus. From 
a specimen in clove oil, X 14. 
P. dorotocephala, sp. nov., to show intestinal tract. A reconstruction from 
a series of frontal sections, X 6. 
Planaria unionicola, sp. nov. From a drawing, apparently from life, 
accompanying the specimen. 
lacteum. Head end, to show the adhesive organ. From an alcoholic 
specimen killed in corrosive sublimate, X 5. 
lacteum. Diagram of sexual organs, X 20. 
lacteum. Longitudinal section to show the sexual organs, X 50. 
lacteum. Transverse section through extreme anterior end, to show 
the adhesive organ, X 80. 
lacteum. Transverse section from same individual as last, somewhat 
posterior to it, X 80. 
D. lacteum. Median longitudinal section through the anterior end and 
adhesive organ, X 80. 
D 
D. 
D. 
P. lacteum. Transverse section through penis, X 40. 
D. 
D. 
