170 MARINE AND FISHERIES 



Placobdella rugosa, (Verrill) Moore. 



5 GEORGE v., A. 1915 



Clepsine ornata, var. rugosa, Verrill (1874). 



Glossiphonia parasitica, var. rugosa. Castle (1900). 



Placobdella rugosa, Moore (1901). 



Thirty-five specimens possess the general form and coloration characteristic 

 of this species. Sizes from 10 to 59 mm, in length and from 3 to 17 mm. in greatest 

 diameter; in shape similar to P. parsitica, broad, flat and blunt at the anterior 

 end. In color also these two species are alike except that in P. rugosa the contrasts 

 are rather less striking. In P. rugosa there is usually an interrupted, dark, dorsal 

 median band. The cutaneous papillae on the dorsal surface are arranged as in 

 P. parasitica but the surface of these is especially rough, hence the specific name 

 rugosa. The oesophageal glands are in this species also, long, blind tubes. 



The collections were made from dredgings, in small lakes and bays, from under 

 sticks and stones in pools or ponds or from the turtles Chelydra serpentina and 

 Chrysemys picta. 



Placobdella montifera, Moore. 



Not Clepsine carinata, Diesing (1858). 



Clepsine papillifera var. carinata, Verrill (1874). 



Hemiclepsis carinata, Moore (1901). 



Among the leeches collected at Georgian Bay, there are twenty-six specimens 

 with the discoidal head and three prominent series of papillae characteristic of 

 this species. Shape more slender and less flattened than most of the species of 

 this genus. In size varying from 5 to 21 mm. in length and from 1 • 5 to 5 mm. in 

 breadth. The ground color is greenish or brown. A darker band is frequently 

 to be seen in the dorsal median line. Along the margin a yellowish band may be 

 seen and the papillae may be tipped with yellow. 



Moore (1912) describes compact salivary glands for this species but the dis- 

 section of the specimens showed that these glands are diffuse rather than compact. 



An interesting similarity has been observed between the position and the 

 structure of the oesophageal glands in P. montifera and P. pediculata. In one 

 specimen, a tube-like body is attached at the male pore, but it has not been found 

 possible to explain its presence. 



The majority of the specimens were collected from the lower sides of logs, 

 stones, or shells of molluscs. Several were obtained by dredging at a depth of 

 six fathoms. One specimen was found clinging to a garpike {Lepisosteus osseus) 

 and another to a sunfish {Eupomotis gibbosus). 



Placobdella phalera, Graf. 



Seven specimens showing the markings characteristic of this species were 

 collected. In size varying from 10 to 18 mm. and from 2 to 6 mm. in breadth. 

 Body broad and flattened, tapering to a rather slender anterior end. Colour brown 

 with a striking greenish tinge. From the anterior end backward to about the 



