Description of Some Japanese Polyclftd Turbeilaria. 1 Q 



same time, and soon receives the common uterine duct (ww) on the 

 ventral side. Beyond this point the passage is continued further 

 backward but for a short distance as the duct of the accessory 

 vesicle (>;), which represents a swollen sac of an elongate shape. 

 The common uterine duct divides, a very short distance from its 

 junction with the shell-gland passage, into two lateral uterine 

 ducts. These, extending anteriorly, skirt the pharyngeal folds and 

 join together in the median line immediately in front of the pharynx. 

 The present species closely resembles in organization Notoplana 

 chierchœ (Plehn 189Ga) from Valparaiso, Chili, but may be distin- 

 guished from this by the different arrangement of eye-spots and by 

 certain features of the male genital organs. 



6. Notoplana delicata, n. sp. 



(PI. IL, fig. 14.— Textfigs. 11-13). 



This is a fairly common species in the neighbourhood of 

 Misaki. Numerous specimens of the species were also collected at 

 Shirahama, Prov. Awa, near the low-tide mark. 



Body in the creeping state elongate, anteriorly broadly 

 rounded, with lateral margins even and nearly parallel for a large 

 part of the body-length, but tapering in the hind parts down to 

 the bluntly pointed posterior end of body. It usually measures 

 27 mm. long by 5 mm. broad. The body is of a delicate texture. 

 Dorsal surface of the translucent body buffy, showing a 

 brownish orange stripe in the median line from behind eye-spots 

 to the posterior body end. Numerous scattered testes and ovaries 

 22 are fairly Avell visible as whitish flecks. 



Ventral surface of a pale or weakly 

 ••* \ i' yellowish orange colour. On that side 



'* of body the pharynx and genital organs 



*** V ma J be discerned with more or less 



rabOf*^ distinctness. 



• Tentacles wanting. Tentacular and 



cerebral eye-spots (textfig. 11) blend 

 TextßgMi. Eye-spôts of Notoplana together, but those posteriorly situated 



délicat a. i p i i 



and oi a somewhat larger size may be 



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