POLYCLADS OF THE EAST COAST PEAKSE 87 



border around it is 0.15 mm wide, and the aperture is 0.3 mm wide; 

 the margin is wavy. The lateral canals of the enteron are reticulate, 

 and about 42 pairs of lateral branches enter the median stem poste- 

 rior to the pharynx. Small enteric twigs extend close to the margin 

 of the body everywhere, and some are distributed to the tentacles. 



The tentacles are blunt and flat. When extended in a living ani- 

 mal they have vertical grooves on their anterior surfaces. The eyes 

 are arranged in two pairs of lateral groups. An elongated group of 

 about 60 are found within and at the base of each tentacle. The two 

 crescentic cerebral groups each contain 28 eyes. These lie anterior 

 to the pharynx. 



The male genital opening is at the posterior border of the pharynx. 

 A conical penis, surrounded by a sheath, lies just inside it. This is 

 connected by ducts with a spherical prostate gland and a long, pyri- 

 form seminal vesicle, which extends posteriorly to the female genital 

 opening. The vasa deferentia enter the posterior end of the vesicle 

 from each side. They have four branches on each side. These con- 

 nect with the numerous testes, which lie in the lateral areas and ex- 

 tend across the body posterior to the median enteric stem. The fe- 

 male genital opening leads into an antrum and a shell gland. Pos- 

 terior to this is a short slender duct that divides into two branches 

 on the left side and three on the right. The anterior branches on 

 each side lead to small uterine glands; the other branches extend 

 posteriorly on each side of the body. The numerous ovaries are 

 interspersed with the testes in the lateral and posterior areas. 



Tyye. — U.S.N.M. no. 20191, from Crooked Island Sound, Farm- 

 dale, Fla., collected November 21, 1935, by A. S. Pearse. 



Remarks. — This species is distinguished from others in the genus 

 Pseudoceros by its maculate, papillate dorsum and the arrangement 

 of the female genital ducts. 



Family EURYLEPTIDAE 



Genus EURYLEPTA Ehrenberg 



EURYLEPTA MACULOSA Verrill 



Eurylepta maculosa Veeriix, 1893, p. 495. 



Verrill's type and two cotypes are in the National Museum, but they 

 are poorly preserved and, even stained and mounted, show very little. 



OLIGOCLADO, new genus 



Like Oligocladus Lang, 1884, but the mouth is not in front of the 

 brain and the male genital aperture is near the posterior margin of 

 the pharynx. The body is flat and elliptical. There is a pair of 



