Descriptions of new Metanemerteans. 7 



meut of the ocelli resenibles that of Proneumtes muUioculatus (cf. 

 Fig. 6 with Fig. 12); biit tlie ocelli of Ä. greenmani aro larger and 

 little over half as numcrous as those of Proneurotes. 



The lateral nerve chords comraissure at the end of the body, 

 above the intestine. 



The Oesophagus opens into the rhj'nchodaeum. 



The 2 intestinal coeca reach to the dorsal portion of the dorsal 

 brain lobe. 



Sensory hairs are present in the body epithelium, in the anal 

 region; pigment is absent. 



Cephalic sense organs reach the brain. The cephalic gland is 

 not very voluminous, not extending behind the brain. 



The rhynchocoel extends to the posterior end of the body. 11 

 lougitudinal nerves in the proboscis. Stilet about as long as its 

 basis; the latter (Fig. 17) rounded basally, constricted in its middle 

 portion. Two lateral stilet pockets present. 



Sexes separate. One or two ova in each ovary ; the ovaries 

 numerous, placed both above and below the nerve chords, 2 to 4 in 

 uuniber on each side of the body, in a given frontal plane. 



Length about 30 mm. Head scarcely wider than neck, truncated 

 anteriorly. Width, when extended, about 1 mm. Very contractile, 

 lively in its motions, seeking (in captivity at least) the surface of the 

 water. Color creamy-white or pinkish, quite transparent. Does not 

 secrete large quantities of viscid mucus, as does Ä. glutinosus. 



Ä. greenmani differs from Ä. ochraceus Verr. in its smaller size, 

 different color, and fewer ocelli. Thus, to quote Verrill's description 

 of the latter species: "Ocelli numerous, but varying somewhat in 

 number; the anterior ones form a submarginal curved row along each 

 side of the head, anteriorly, but curve inward farther back ; just back 

 of these, on each side, there are usually four distinct posterior ocelli ; 

 Standing two by two, obliquely. Color dull yellowish, or yellowish- 

 white, offen tinged with deeper yellow or orange anteriorly, with the 

 median line lighter. . . . Length 50 mm to 70 mm; breadth 2,5 mm 

 to 3 mm." 



It also differs from the related Ämphiporus {Polina) griseus 

 (Stimps,), as is seen from Stimpson's (in : Proc. Acad. Nat. Sc. Phila- 

 delphia, V. 9, 1857, p. 164) description of this species: ^^ Ocelli in 

 acervos quatuor aggregati. . . . Ocellorum acervi anteriores majores, 

 elongaü, in parte antero-laterali capitis suhmarginales dispositi; ocelli 



