A. JEJ. Verrill — Marine Planarians of Ne%o England. 479 



be readily seen iu life ; the anterior clusters are shorter than in life, 

 owing to contraction. The retracted pharynx has five pairs of large 

 lateral lobes, and a pair of smaller ones anteriorly. The mouth is 

 about opposite the second pair of large lobes. 



The greater part of the body is filled with small rounded ovarian 

 folicles (o, o) crowded between and around the branches of the 

 stomach. A still larger number of spermaries [t, t), of smaller size, 

 are arranged around and between the ovaries.* Only a part of them 

 are represented in the figure. 



The male organs of copulation are larger than in most species and 

 rather conspicuous. The muscular penis-sheath {q) is stout-cylindri- 

 cal, or slightly clavate, longer than broad. Its anterior part is cov- 

 ered by a nearly globular "granular gland" {k) with thick, dark 

 colored walls. The seminal vesicle (r) in a ventral view appears 

 like a rounded cap anterior to, and above the granular gland ; it con- 

 sists of a median ^nd two lateral lobes. The penis (/>) is long, 

 slender, and somewhat enlarged at the end, as seen in this example, 

 in which it is retracted and probably unnaturally crooked and 

 twisted, owing to the mode of preservation. 



The female genital pore is situated at the bottom of a large and 

 deep funnel-shaped pit (perhaps produced by conti'action), and is 

 situated about a third of the distance from the male pore to the end 

 of the body. The female duct (y, v') extends forward to near the 

 male pore where it bends upward and turns abruptly backward on 

 itself, and then becoming a narrow tube (??'), runs backward con- 

 siderably beyond the male genital pore and connects with a rather 

 large and nearly round spermatheca or receptaculuni seiniiialis. 



This organ (s, s') seems to consist of two parts or compartments, 

 for in some specimens there can be seen a smaller rounded organ [s') 

 overlapping or resting upon its anterior side and apparently having 

 its cavity continuous with the other. In other specimens it is in 

 front of the main vesicle and seems joined to it by a neck. These 

 parts are,. however, much obscured by the glandular organs of the 

 region, the stomach branches, and other organs. The first or ventral 

 portion of the female duct {v), which is usually considered the 

 vaginaf or bursa copidatrix is rather thick, increasing in diameter 

 to the anterior bend, and it receives, on each side, the ducts of very 



* This preparation has been stained with borax-carmine and with picric acid, so 

 that the organs show very plainly. The spermaries are darlc brown and the ovaries 

 bright red. Other mounted specimens of the species agree well with this one. 



f See note under the genus, p. 477. 



