HIRUDINEA 



319 



G. rugosa (Verr.). Body rou^li and papillose; color variegated, 

 spotted irregularly with yellow and green; 2 eyes; length 5 cm.: abun- 

 dant under stones in run- 

 ning water. 



G. stagnalis (L.) 

 (Fig. 502). Body small, 

 rather elongate, grayish 

 or pinkish in color, and 

 25 mm. long by 2 mm. 



Fig. 502 



Glossiphonia 



stagnalis 



(Siissw. 



F. Deut.). 



wide when extended; 10 



mm. long at rest; annu- 

 lation distinct; 2 eyes; 

 between rings 12 and 13 is a con- 

 spicuous brown, cuticular plate; crop 

 with but one pair of pouches: in 

 ponds and sluggish streams, where it 

 feeds on small snails; very common; 

 Europe; very active in its move- 

 ments. 



G.heteroclita (L.) (Fig, 503). Body 

 transparent, yellowish or brownish in 

 color, about 10 mm. long and 3 mm. 

 wide, and with indistinct rings; 6 eyes 

 arranged in pairs at the corners of a 

 triangle: in p^onds and sluggish 

 streams ; Europe. 



2. Hemiclepsis Vej- 

 dovsky. Anterior sucker 

 pedunculate; body wide 

 and flat : several species. 

 B. carinata Verrill. 

 Body 35 mm. long, rather 

 slender ; color greenish 

 with longitudinal stripes ; 

 eyes 2, conspicuous : com- 



Fig. 503 mon in streams, some- 

 Olossiphonia 



heterociita times attached to frogs 

 (Siissw. F. 

 Deut.). or toads. 



Fig, 501 — Glossiphonia elegans — 

 diagram showing the digestive and 

 genital tracts, seen from the dorsal 

 surface, the somites being numbered 

 on the left and the rings on the 

 right side (Castle), an., anus ; br., 

 brain ; cr., crop ; in., intestine ; ov., 

 ovary ; pr,, proboscis ; p.s., poste- 

 rior sucker ; si,, salivary glands ; 

 St., stomach ; t., testis ; d, male 

 genital pore ; 9, female genital pore. 



Order 2. GNATHOBDELLIDA. 

 Fresh-water and terrestrial leeches without a proboscis and usually 

 with 3 jaws (Fig. 497, A) ; blood red: 2 families. 



