518 TF.il. Coe — Neic Palmonemerteans. 



The body-wall is made up of integument, and outer longitudinal, 

 circular, and inner longitudinal muscular layers. The lateral cords 

 lie just outside the circular muscular layer. 



Basement layer of the integument but little developed ; the cuti- 

 cular glands extend into the outer longitudinal muscular layer. 

 Proboscis without muscular crosses ; provided with an outer longi- 

 tudinal, a circular, and an inner longitudinal muscular layer. The 

 side-organs, though small and flattened, form distinct lobes of the 

 brain. They are imbedded in the muscles of the head near the 

 dorso-lateral borders of the dorsal brain-lobes. 



This genus is nearly related to Eupolia^ but the latter differs 

 especially in having the head broadened and not directly continuous 

 with the body ; in not having the intestinal region much flattened; 

 in having a distinct layer of connective tissue, or basement layer, 

 between the outer muscular layer of the body-wall and the glands 

 of the cutis ; in the structure of the proboscis ; and in the position 

 of the side-organs. 



Parapolia aurantiaca sp. nov. 



Body large, stout, rounded in the oesophagal region, flattened and 

 broad beyond. In alcohol the anterior portion of the body is cylin- 

 drical. The oesophagal region decreases in diameter towards its pos- 

 terior end. At the commencement of the intestinal region the body 

 suddenly flattens and widens, and is thus divided into two distinct 

 regions. In the intestinal region there is a conspicuous dorsal ridge 

 above the proboscis-sheath. Head blunt, rounded in front, cylin- 

 drical, continuous with the oesophagal region. It is provided with a 

 narrow, annular constriction near the tip. This constriction is made 

 up of two lateral, transverse furrows into which the ciliated ducts 

 leading to the side-organs open. In alcohol the transverse furrows 

 are united above and below, although in the living animal they are 

 probably separate. In the center of the constriction, in a sub-ter- 

 minal position, is a small dimple marking the position of the mouth 

 and the opening of the rhynchodaeum. The latter is a minute pore 

 situated on a slight prominence in front of the small, elongated 

 mouth. No eyes were observed nor can any be detected in micro- 

 scopic sections. 



* Eupolia Hubrecht, Yoyage of the Challenger, xix, 1887. 



Polia (delle Chiaje) Hubrecht. Notes from the Ley den Museum, i, 1879 {non Quatre- 



fages, Ann. des Sci. Nat,, vi, 1846). 

 Eupolia Burger, Xachr. von der K. Gesellschafc der. Wiss. zu Gottingen, 1892 ; 



Joubin, Faune FranQaise, 1 893. 



