POLYCLADS' OF THE ATLANTIC COAST — HYMAN 473 



in Pearse and Littler (p. 237) under this name as collected in Bogue 

 Sound. The specimen mentioned in Pearse (1938, p. 77) as collected 

 at Beaufort in 1938 could not be found in the Pearse material. 



DIGYNOPORA, new genus 



Depnitiori. — Leptoplanidae with a ductus vaginalis opening to the 

 exterior by a separate pore behind the common genital pore; male 

 system as in StyJocho plana; tentacles wanting. 



Type. — D. americana, new species. 



DIGYNOPORA AMERICANA, new speries 

 FiGTJBE 29, a^c 



Leptoplcna angusta Pejaese and Littleb, 1938, i)l. 20, fig. 4. 



Material. — One whole mount in Pearse collection, No. 446. 



Form. — Elongate, slender, ends rounded, sides probably parallel, 

 length 13.5 mm., width 5 mm., contracted, much longer and slenderer 

 in life (26 mm. according to Pearse) ; tentacles wanting (fig. 29, b). 

 (The description of Pearse and Littler of this specimen is merely a 

 copy of Ver rill's description of Leptoplana angusta.) 



Eyes. — Tentacular and cerebral clusters blended on each side into 

 an elongated group of about 40-50 eyes (fig. 29, a) in which the ten- 

 tacular groups containing the larger eyes can be somewhat distin- 

 guished. 



Color. — Statement of Pearse and Littler about the color is a copy of 

 Verrill's statement but very likely the animal is brown above. 



Digestive syst&m. — Pharynx elongated, narrow, with moderate 

 lateral folds, slightly anterior to center of body (fig. 29, h) ; digestive 

 branches radiating, anastomosed. 



Reproductive systerti. — Sexual region removed and sectioned ; found 

 in very bad histological condition, especially the female tract. Com- 

 mon genital pore well removed from posterior end, about 3 mm. 

 from this (fig. 29, & ) . Male apparatus as in the genus StyJochoplana. 

 Male antrum occupied by large penis papilla of elongated conical 

 form, not very muscular (fig. 29, c). Vasa deferentia proceed along 

 rear part of pharynx as sinuous tubes, enter ventral end of oval semi- 

 nal vesicle with thick muscular wall of circular fibers. Narrowed 

 duct also with muscular wall of circular fibers proceeds posteriorly, 

 enters oval prostatic vesicle, larger than seminal vesicle, with very 

 thick muscular wall of chiefly circular fibers, penetrated by ducts of 

 gland cells; relatively small lumen of prostate lined by glandular 

 epithelium. Prostate passes directlj' into penis papilla. Female tract 

 unfortunately could not be clearly made out on the sections, but the 

 presence of a ductus vaginalis is definite. Vagina opens by small 



