W. M. Coe — N'ew Palceonemerteans. 521 



intestinal caeca. They are discharged through ducts opening on the 

 dorsal surface of the body. Many parasitic worms were found 

 imbedded in the muscles of the body -wall and occasionally in the 

 proboscis-sheath. They occurred coiled up in spherical or oval cap- 

 sules about 1"^°^ in diameter. 



Valencinia Quatrefages, Annales des Sci. Naturelles, vi, 1846; Burger, Nach. von 

 der K. Gesellschaft der Wiss. zu Gottingen, 1892 ; Joubin, Eaune Frangaise, 1893. 



Head pointed in front, without lateral slits. Ocelli absent or few 

 in number. The proboscis-opening lies far back, nearly to the brain- 

 lobes. The body-wall consists of four layers : integument, outer 

 longitudinal, circular, and inner longitudinal muscular layers. The 

 lateral cords lie outside the circular layer of muscles. 



Valencinia rubens sp. no v. 



Body almost cylindrical, slightly flattened posteriorly. Head flat- 

 tened, elongated, sharply pointed in front, marked off from the body 

 by a shallow, annular constriction. Proboscis-opening minute, situ- 

 ated far back, just in front of the brain. Mouth small, placed a short 

 distance back of the proboscis-opening. Ocelli none. No lateral 

 slits. On each side of the head there is an inconspicuous pit into 

 which the canal of the side-organ opens. 



Color pinkish anteriorly, deep red tinged with yellow posteriorly.* 

 A single specimen, from which the posterior end was missing, was 

 collected in the sand at low water at Wood's Holl, Mass., in Aug., 

 1894. The length of the cesophagal region of this specimen was 

 about 35™"^, and of the intestinal region only about 25""™ remained. 

 The diameter was about 3™™. 



The glandular layers of the integument are not separated from the 

 outer longitudinal muscular layer of the body-wall. The circular 

 and inner longitudinal muscular layers are much as in Cerehratidus. 

 The proboscis-sheath is thin, but it reaches far back. Proboscis short, 

 composed anteriorly of a circular and an inner longitudinal layer ; 

 farther back an outer longitudinal layer arises outside this circular 

 layer. There are three longitudinal blood-vascular trunks. The 

 dorsal vessel runs in the proboscis-sheath about two-thirds the length 



*This species bears a close external resemblance to V. longirostris Quatrefages 

 (Annales des Sciences Naturelles, vi, 1846) of Europe. It appears to differ, however, 

 in the structure of the proboscis, and in other anatomical details. 



