fitc British Species of Terebella, 343 



Spec. 3. Terebella nebulosa. 

 Tab. XII. Fig. 2. 



T. with its body spotted with white, having thirteen dorsal plates. 



Body long, orange-red, spotted all over with white. Anterior 

 extremity very tumid, defended by the dorsal plates: anterior 

 peduncles very small, with the fasciculi pointed. The other 

 peduncles and fasciculi are broad. The posterior end is ab- 

 ruptly smaller than the other, as if it had been lost by acci- 

 dent, and afterwards reproduced. The capillary tentacula are 

 numerous, and of a pale orange-colour spotted with white. 

 Branchiae red with white spots. 



Length six or seven inches. 



Diameter of the largest part half an inch. 



Inhabits the southern coast of Devon rarely, being taken only by 

 deep dredging. Its case is composed of slimy matter, covered 

 with gravel and broken shells. 



Spec. 4. Terebella Constrictor, 



Tab. XIII. Fig. 1. 



T. with twelve broad plates on the back : capillary appendages 



pale. 



Body orange-red, with about one hundred and twenty approxi- 

 mate articulations furnished with small fasciculi; those behind 

 the dorsal plates are divided down the middle by a sulcus : 

 mouth with an expanded lower lip, surrounded with capillary 

 appendages longer than the body. 

 Length three or four inches. 

 Inhabits the coast of Devon, and is rare. 



The very closely-connected articulations discriminate this spe- 

 cies from any of the others. Its case or tube is unknown. 



Spec. 



