﻿144 LEIDY ON THE MARINE INVERTEBRATE FAUNA OF 



NEMATOIDEA. 



Pontonema, Leidy. Body capillary, narrowing towards the extremities. Head 

 continuous with the body, obtuse, pointed, with short cirri. Eyes none, caudal ex- 

 tremity obtuse. Generative aperture near the middle of the body. (Esophagus long, 

 cylindrical ; intestine cylindrical. Ovaries two. Allied to Amblyura. Marine. 



28. Pontonema vactllatum, Leidy. Body cylindroid, with minute cirri anteriorly 

 in addition to those around the head. Tail short, obtuse, incurved. Color brown- 

 ish white. Length to three-fourths of an inch, by one-fifth of a line in thickness. 

 Pound abundantly beneath stones, between tides, at Point Judith. 



29. Pontonema marinum, Leidy. Body cylindroid. Tail long, narrow, blunt. 

 Color white. Length to three lines. Obtained from an oyster bed, in about six feet 

 water, in one of the sounds near Atlantic City, New Jersey. 



ENTOZOA. 



30. Gregarina . Body elliptical ; head oblate spheroidal. Length -225 mm., 



breadth "072 mm. Prom the intestine of Nereis denticuluia. 



31. Leucophrys clavata, Leidy, (Journ. Acad. Nat. Sc. ii. 50.) In the visceral 

 cavity of Lumbriculus tenuis. . 



32. Leucophrys cochleariformis, Leidy. (PI. XL figs. 62, 63.) Body curved cochle- 

 ariform. Length *135 to *18 mm. From the intestinal canal of Lumbriculus tenuis. 



I found four individuals of this remarkable species in a dozen of the Lumbriculus. 

 While within the intestine it appeared quiescent, but when set free it moved about 

 actively, by means of its long vibrating cilia, with the bowl-end forward. 



ANNULATA. 



NaraganseTA, Leidy. Body cylindrical;, narrowed posteriorly ; no lateral pinnae ; 

 segments numerous ; those anteriorly furnished with a few, simple, cylindrical, lateral 

 tentaculae ; anterior segments with four rows of simple setae in fascicles ; succeeding 

 few segments with two rows of simple setae, and two rows of cochleariform podal 

 spines ; posterior segments with four rows of cochleariform spines. Upper lip distinct, 

 conical, eyes none. 



33. Naraganseta corAlii, Leidy. (PI. XL figs. 46 — 48.) Body black, brownish 

 or yellowish black, ninety segments in an individual, one inch and a quarter in length. 

 Eight comparatively short tentaculae on each side of the anterior six segments ; three 

 to the first segment ; first two the shortest, the third the most robust ; orange in color, 

 and except the most robust one, tipped with black. Anterior ten segments with four 

 rows of simple setae in fasciculi of five; the succeeding four segments with two rows 



