NOTES ON SOME OF THE POLYCH^TA. 349 



Manx coast ; a very clearly-defined scar was, however, pre- 

 sent, indicating probably the position of the lost tentacle 

 (see PL VIII, fig. 1). The proboscis was long, and presented 

 in section a quadrate lumen, owing to the arrangement of 

 the layers of muscle. 



Along the ventral surface of the anterior part of the 

 body, more especially upon the ridges formed by the longitu- 

 dinal muscle bands, a large number of minute globular pro- 

 jections were seen (PI. VIII, fig. 2). Each projection was 

 ovoid or elliptical in vertical section. Each has a central 

 core, covered by a thick cuticle, which is continuous with the 

 cuticle over the ventral surface of the body. The cuticle 

 over the papilla is faintly striated at right angles to the 

 surface (PI. VIII, tig. 4). The core is granular and fibrillar, 

 and towards the base shews larger nuclear looking bodies. 

 The core is directly continuous with fibrillse from nerve 

 fibres, which are abundantly distributed to the ventral sur- 

 face of the body. The stalk of the papilla is very thin and 

 hyaline in appearance, and contains a central core, composed 

 of fibrillse, connecting the nerve fibres with the core of the 

 papilla (PL VIII, fig. 3). The nervous system is very much 

 flattened dorso ventrally, and gives off very large nerves to 

 the sides of the body, fibres from which supply the above- 

 mentioned papillae, which are doubtless some form of tactile 

 sense organ not previously noticed. 



The specimen examined was a female, and every available 

 space in the coelome was filled with eggs, which took on 

 carmine staining very deeply. 



(c.) On the synonymy of Pectinaria helgica, Pallas, and 

 Pectinaria aiiricoina, Miilier. 



Pectinaria helgica was described under the synonym of 

 Nereis cylindraria, var. helgica by Pallas, in his "' Mis- 

 cellanea Zoologica," 1766 ; and Pectinaria auncoma was 



