OMATOPLEA. 23 



Nemertes gracilis, Johnston in Mag. Zool. Sf Bot. i. 5'M. pi. 17. f. 1. 



IV. Thompson in Ann. S,- Mag. Nat. Hist. vii. 482. 

 Prostoma gracilis, Johnston in Ann. S)- Mag. Nat. Hist. .\vi. 435. 

 Polystemma gracile. Oersted, Entw. Plattw. 93. 

 Omatoplea gracilis. Dies. Syst. Helm. i. 250. 



Hab. Under stones near low-water mark. 



Obs. This is probably the "small and slender animal" described 

 by Sir J. G. Dalyell, Paw. Great, ii. fio. pi. 8. f. 3-6. 



2. 0. rosea, linear-elongate, romided at both ends, of a uniform 

 cream-colour or roseate ; eyes many, in four clusters anterior to the 

 reddish cardiac spots, the posterior clusters small. Length 3" ; 

 breadth 2'". 



Fasciola rosea. Mull. Verm. i. ii. 58. 



Planaria rosea. Mull. Zool. Dan. Prod. 221 ; Zool. Dan. ii. 31 . tab. 64. 



f. 1, 2. W. Thompson in Ann. Nat. Hist. xv. 321. Turt. Gmel. 



iv. 62. Bosc, Vers, i. 299. 

 Planaria lactiflorea, Johnston in Zool. Journ. iii. 489. 

 Nemertes lactiflorea, Johnston in Mag. Zool. 6f Bot. i. 535. pi. 17- 



f. 2, 3. W. Thompson in Ann. ^ Mag. Nat. Hist. vii. 482. 

 Prostoma lactiflorea, Johnston in Ann. Sf- Mag. Nat. Hist. xvi. 435. 

 Prostoma? rosea, Johnston in ibid. 436. 

 Polystemma roseum. Oersted, Entw. Plattw. 92. 

 Omatoplea rosea. Dies. Syst. Helm. i. 251. 

 Gordius albicans, Dalyell, Pow. Great, ii. 73. pi. 10. f. 5 a, 6. 



Hab. Between tide-marks. 



(a) Berwick Bay, Dr. Johnston. 



3. 0. alba, whitish, with fourteen eyes anterior to the cardiac spots, 

 " the first four on each side near the margin of the body disposed 

 in a line, and at equal distances from each other ; considerably 

 behind them are three at each side disposed in a triangular manner, 

 the base towards the head of the worm." Length 2" ; breadth 1'". 



Borlasia? alba, W. Thompson's Rep. Brit. Assoc. 1843, 271 ; Ann. 

 Nat. Hist. XV. 320. Johnston in Ann. Sf Mag. Nat. Hist. xvi. 434. 

 Omatoplea alba. Dies. Syst. Helm. i. 252. 



Hab. Under stones between tide-marks. 



4. 0. melanocephala, linear-elongate, yellow or yellowish-green with 

 a dark or black head ; eyes four, arranged in a quadrangle. Length 

 If; breadth i'". 



Nemertes melanocephala, Johnston in Mag. Zool. Sf Bot. i. 535. pi. 1/. 



f. 4, 5. W. Thompson in Ann. Sf Mag. Nat. Hist, xviii. 38/. 



Oersted, Entw. Plattw. 88. Dies. Syst. Helm. i. 27(1 

 Prostoma candiilum? Duges in Ann. des Sc. nat. xxi. 74. pi. 2. f. 3. 

 Prostoma me\anoce\A\a\a, Johnston in Ann. S)- Mag. Nat. Hist .\\i. 43G. 

 Vermiculus coluber, Dalyell, Pou\ Great, ii. 91. pi. 10. f. 22, 23, 24. 



Hab. Under stones between tide-marks, in wet sand. 



