24 TERETULARIA. 



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

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

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



(ff) Berwick Bay, Dr. Johnston. 



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

 colour, with 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. Sf Bot. i. 536. pi. 17- f- 6. 



Prostoma pulchra, Johnston in Ann. Sf- Mag. Nat. Hist. xvi. 436. 



Polysterama pulchrum, Oersted, Entw. Plattw. 93. 



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



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



Ilab. 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 Ii"'. 



Gordius viridis spinifer, Dalyell, Pow. Creat, ii. 78. pi. 11. f. 1. 

 Ilab. Coast of Scotland, rare, Daly ell. 



2. S. purpureus, 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 \\'". 



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

 Hub. 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, Poiv, Creat. ii. 79. pi. 11. f. 5. 

 Hub. Coast of Scotland, Dalyell. 



•I. S. fasciatus, seuu('ylin<lrical, almost linear; the head obtuse, 

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



