24 TERETULARIA. 



Ohs. The Tetrastemma ohscurum of Dr. M. S. Schultze is nearly 

 allied to this species ; and Schultze has proved that his species is 

 viviparous {Naturg. Turbell. 62. tab. 6. f. 2-10). 



{a) Berwick Bay, Dr. Johnston. 



5. 0. pulchra, linear-elliptical, rounded at both ends, of a flesh-red 

 colour, vfiih a series of scarlet spots along each side, or of a uniform 

 aurora-red ; eyes numerous, clustered in front. Length 1-2" ; 

 breadth 2-3'". 



Nemertes pulchra, Johnston in Mag. Zool. 8f Bot. i. 536. pi. 17- f. 6. 



Prostoma pulchra, Johnston in Ann. 8f Mag. Nat. Hist. xvi. 436. 



Polystemma pulchmm. Oersted, Entw. Plattw. 93. 



Omatoplea pulchra. Dies. Syst. Helm. i. 252. 



Vermiculus rubens, Dalyell, Pow. Creat. ii. 89. pi. 10. f. 13-18. 



Hab. The coralline region. 



17. STYLUS. 

 Spinifer, Dalyell, Pow. Creat. ii. 77 (1853). 

 Char. Body linear-elongate, flattish ; the head indistinctly defined, 

 continuous with the body, oculate, and with a fissure on each side ; 

 the posterior end terminated with a cartilaginous style. 



1 . S. viridis, uniform mountain-green ; the nuchal grooves very 

 distinct ; posterior extremity narrowed, with a style one-sixth the 

 length of the body. Length 3" ; breadth l^"'. 



Gordius viridis spinifer, Dalyell, Pow. Creat. ii. 78. pi. 1 1 . f . 1 . 

 Hab. Coast of Scotland, rare, Dalyell. 



2. S. purpiireus, of a deep red purple colour; head somewhat spa- 

 thulate, obtuse, with a fissure on each side ; posterior extremity 

 narrowed and terminated with a roughish style. Length 8" ; 

 breadth 1^"'. 



Gordius purpureus spinifer, Dalyell, Pow. Creat. ii. 78. pi. 11. f. 2-4. 

 Hab. Coast of Scotland, rare. 



3. S. fragilis, of a uniform reddish-orange colour ; the front pointed. 

 Length 3^" ; breadth 2"' ; anal style 6"'. 



Gordius fragilis spinifer, Dalyell, Pow. Creat. ii. 79. pi. 11. f. 6. 

 Hab. Coast of Scotland, Dalyell. 



4. S. fasciatus, semicylindrical, almost linear; the head obtuse, 

 multocular; the anal style long and flexible; orange or reddish- 



