66 LUMBRIClDiE. 



** Littoral. 

 4. S. lineata, dorsal vessel simple, tortuous ; segments about 40 ; 

 anal segment sinuate. Length 6'". 



Der rothe Wurm, ikfiiZZ. Wurm-Arten, llOj der Faden-Wurm, 118. 



tab. 3. f. 4, 5. 

 Lumbricus lineatus, Miill. Verm. i. ii. 29; Zool. Dan. Prod. no. 2606. 



Fabric. Faun. Grosnl. 278. 

 Nais littoralis, var., Milll. Zool. Dan. tab. 80. f. 1-4. 

 Saenuris lineata, Grube, Fam. Annel. 103. 



Hab. In wet gravel or sand on the shore where the water is 

 brackish. 



Besc. Worm slender, slightly narrower at both ends, of a reddish 

 colour to the naked eye, smooth, the sides neatly crenulated. Seg- 

 ments about equal in length to their diameter. Anal segment obtuse, 

 deeply sinuate, mutable in form, for the little prominences which 

 bound the sinus can be expanded or shut at pleasure. Spinets in 

 four series, equidistant, from two to four in each fascicle, short, 

 curved like an italic/, and sharp at the apex. 



(a) Feme Isles, Northumberland, Dr. Johnston. 



4. CLITELLIO*. 



Clitellio, Savig, Syst. Annel. 104. Grube, Fam. Annel. 103. 

 Char. Body fihform, smooth, distinctly annulated, pellucid, with 

 a clitellus on the anterior third, and a pair of mammiform protrusile 

 processes on the venter of one of its segments : head or first segment 

 obtusely conical : mouth inferior : spinets uniform, in four series. 

 Littoral. 



No. II. — Clitellio arenarius. 

 24 



a. Worm of the natural size. 6. Anterior portion magnified. 



c. A view of the ventral surface of the ninth ring, to show the mammiform process. 



d. The anal segments. e. Bristles magnified. 



* Agassiz writes it " CliteUis," and says it was established in 1817. 



