92 Papers from the Marine Biological Laboratory at Torttigas. 



Disiomiim jencstratum Linton, from Hamulon plumieri. 



Fig. 105. Ventral view, life; length 3.5 mm. 



Fig. 106. Transverse section near posterior end, somewhat diagrammatic; 

 breadth 0.25 mm. 



Xystretritm papiUosinn gen. et sp. nov., from Lactophrys triqtieter. 



Fig. 107. Ventral view, balsam; length 3.5 mm. Folds of the uterus dia- 

 grammatic. The ova are really much more numerous than 

 represented, c, cirrus extruded; n, ventral corrugated disk. 



Fig. 107a. Spines from posterior border enlarged. 



Fig. 108. Papillary spines lining mouth cavity; diameter of mouth 0.16 mm. 



Fig. 109. Papillary spines on ventral sucker; diameter of ventral sucker 

 0.21 mm. 



Fig. no. Transverse ridges of ventral disk. 



Fig. III. Outline of vitelline glands. 



Hysterolecitha rosea gen. et sp. nov., from Tenth-is hepaius. 



Fig. 112. Ventro-lateral view, life, details added; length 3.36 mm. 

 Fig. 113. Ovary and vitelline glands seen from right side; longer diameter 

 of ovary o.ii mm. 



Plate 14. 



Hysterolecitha rosea, continued, from Tettthis hepatus. 



Fig. 114. Ejaculatory duct, seminal vesicle, and metraterm, life; highly 

 magnified, pr, cells surrounding genital aperture. 



Figs. 115, 116, 117. Sketches of ovary, vitelline gland, and seminal receptacle 

 from different specimens. 



Macradena perfecia gen. et sp. nov., from Teuthis cceruleus. 



Fig. 118. Sketch made up from about 3 adjacent, horizontal sections, some- 

 what diagrammatic; length 2.55 mm. 



Fig. 119. Part of transverse section through seminal receptacle, yolk-gland 

 and shell-gland; diameter 0.45 mm. 



Opisthadena dimidia gen. et sp. nov., from Kyphosus scctatrix. 



Fig. 120. Ventral view, life, details added; length 2.80 mm. 

 Fig. 1 20a. Ova; length 0.038 mm. 



Fig. 121. Dorsal view, made up from horizontal sections, diagrammatic; 

 length 5 mm. 



Plate 15. 



Opisthadena dimidia, continued. 



Fig. 122. Transverse section showing extraordinary development of longi- 

 tudinal muscles of body-wall and of walls of intestine; diameter 



0.45 mm. 



Brachadcna pyriformis gen. et sp. nov. 



Fig. 123. Ventral view, life, details added; length 1.61 mm. From Hcemulon 



plumieri. 

 Fig. 123a. Ovum; length 0.037 mm. 

 Fig. 124. Ventral view of small specimen, balsam; length 0.65 mm. From 



H. sciurus. 

 Fig. 125. Sagittal section of neck; diameter of oral sucker 0.0 10 mm. From 



Calarmis calamus. 

 Fig. 126. Ventral view of cirrus-pouch, balsam. From H. plumieri. 



Dichadena acuta gen. et sp. nov. 



Fig. 127. Ventro-lateral view, balsam; length 1.55 mm. From Teuthis 

 cceruleus. 



