472 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 89 



(Hyman, 1939a), P. grcwile is not a Prosthiostomum at all and this 

 was realized by Girard himself in 1893 when he created a new genus 

 for the species. 



EUPLANA CAROLINENSIS, new species 



Figure 28. h-d 

 Leptoplana angusta Peabse and Littleb, 1938, p. 237. 



Material. — One whole mount in Peaise collection labeled Lepto- 

 plana angusta^ slide No. 370. 



Fot^m.. — Elongate obovate, anteriorly expanded, widest at level of 

 brain, tapering from there to blunt posterior end, 5 mm. long (some- 

 what contracted) ; no tentacles (fig. 28, c). 



Eyes. — In four separated clusters; tentacular clusters rounded, of 

 8-12 eyes; cerebral clusters elongated, of 20-25 eyes (fig. 28, 5). 



Color. — Unknown, presumably brownish above. 



Digestive tract. — Pharynx long and narrow (fig. 28, <?), with 

 slight folds; digestive branches not well seen. 



Reproductive system. — Copulatory apparatus directly behind the 

 pharynx (fig. 28, c) ; genital pores separate, but only a short dis- 

 tance apart. Sections of copulatory apparatus poor, but apparatus 

 corresponds to the genus Euplana without much doubt; probably 

 distorted by flattening of specimen to make a whole mount. Male 

 genital pore leads into elongated male atrium (fig. 28, 6?), probably 

 distorted. Vasa deferentia enter from below bulbous seminal vesicle 

 with thick wall of circular fibers. From this muscular male canal 

 proceeds posteriorly and terminates in small penis papilla projecting 

 into roof of male atrium. There appeared to be no definite differ- 

 entiation of a prostatic vesicle, nor could any prostatic glands be 

 seen, because of the poor histological state of the specimen. Female 

 genital pore opens into a sort of pocket, probably artificial; vagina 

 with thin muscular coat proceeds anteriorly, then dorsally, and finally 

 makes a U-shaped curve, receiving the uteri at the end of this 

 curve (fig. 28, d) ; Lang's vesicle absent. Cement glands enter that 

 part of the vagina preceding the U-bend. 



Differential diagnosis. — Combination of elongate pharynx, sepa- 

 rated cerebral and tentacular eye clusters, long male atrium, small 

 penis papilla, enlarged seminal vesicle, and curved vagina. 



Distribution. — Beaufort, N. C, Bogue Sound, on shells, ascidians, 

 collected by Pearse, September 9, 1937. 



Type. — Anterior half as whole mount, posterior half as sagittal 

 sections (1 slide), U. S. N. M. No. 20532. 



Remarks. — This is the second leptoplanid confused by Pearse un- 

 der the name Leptoplana angusta. It is the specimen mentioned 



