A. E. Verrlll — Marine Planarians of JSTeto England. 481 



latter being Diore numerous and smaller than the former, and 

 often grouped around them in clusters.* 



The male genital orifice is far from the hind end of the body. 

 The granular gland (k) is nearly round and prominent. The seminal 

 vesicle (r) rests against the anterior side of the granular gland and 

 consists of a central and two lateral parts, partially concealed by the 

 granular gland, the exposed part being obovate or somewhat pyri- 

 form, as usually seen ; the lateral portions are continuous with the 

 vasa deferentia [d). The penis-sheath {q) is short, stout, somewhat 

 conical ; the penis itself, or verge, {p) is very long and slender, 

 cirriform or hair-like, ajjparently somewhat chitinous, usually more 

 or less coiled, often exsert in the preserved specimens. 



The female genital orifice is usually surrounded by a broad circu- 

 lar pit. The first part of the duct (or vagina, v) is relatively large 

 and long, a little expanded at the end, narrowing farther forward 

 and bending upward and backward close to the male orifice, where 

 it expands into a small ovate vesicle, from which it extends back- 

 ward as a narrow moniliform tube (w') which runs back beyond the 

 external orifice and passes into the elongated cornucopia-shaped 

 sperniatheca {s), which is broad at the anterior, and pointed at the 

 posterior end. In many specimens there appeared to be a small duct 

 leading from the posterior end of the spermatheea to a minute ex- 

 ternal orifice {x), but this is uncertain, for it may be the nephridial 

 duct. 



Vineyard Sound to Eastport, Me., low-water mark to 42 fathoms 

 or more. Abundant at Gloucestei", Mass., on the shores, under 

 stones, on the piles of wharves, and in tide-pools, especially at Ten 

 Pound Island, 1878. Off Cape Ann, Mass., station 156, in 42 

 fathoms, muddy bottom, 1878 (No. 20). Casco Bay, Me., in tide- 

 pools, 1873 ; Eastport, Me., in tide-pools and under stones at low- 

 water mark, 1868, 1870, 1872. Vineyard Sound, on telegraph Cable, 

 off Cuttyhunk Island. 



The original description of this species is almost useless for its 

 identification. It is as follows: "This species is oblong-shaped, 

 somewhat lanceolated, of a color varying from a light greenish yel- 



* In the specimen (No. 20) illustrated (figs. 3-36), the ovaries are colored light red, 

 while the testes are colored dark red by the staining fluid used (alcoholic borax-car- 

 mine) and are, therefore, easily distinguishable. In order to prevent confusion, only 

 a part of these organs are actually figured. The uterine sacs, oviducts, and most of 

 the large sperm-ducts are also omitted, as well as the branches of the stomach, all 

 of which can be seen, more or less distinctly, in the preparation. 



