292 ]\[r. J. W. Piyde on Annelida Pohjchmta 



very mucli faded owing to the preserving fluid. The pro- 

 boscis was not extruded, but, when examined, had a sin^^le 

 conical tooth in the anterior margin. The feet were typical 

 of the species. 



The writer of the Monograph states that the animals 

 are hard and stiff", comparatively sluggish, hiding under 

 debris in a vessel or crawling slowly over the bottom. 



The sexual form of this species is known as loida macro- 

 phthalma and is described by Prof. M'Intosh *. 



Syllis krohnii, Ehlers, 1864. 



Unfortunately the only example of this species suff'ered in 

 the Laboratory fire and, consequently, it is now somewhat 

 dried and shrivelled in appearance, besides being black in 

 colour. The label, moreover, has been lost and so no locality 

 nor depth can be given. It is more a littoral than a deep- 

 sea form and has been found in the Adriatic {Ehlers), 

 ]\Iediterranean, Canaries {Langerhaus\ off the shores of 

 Prance [De St. Joseph), and in the Outer Hebrides. 



The specimen is complete, measuring about an inch in 

 length. The head is conspicuously notched in front, but 

 narrows behind. The eyes are four in number, reddish in 

 colour, placed obliquely in pairs, the anterior being the 

 wider apart (Ai^Intosh). The palpi are fairly long and taper 

 towards their tips. They are ciliated in perfect specimens. 

 The median tentacle arises between the eyes and projects 

 upward. It is longer than the laterals, which resemble it. 

 All pigment-spots are obliterated in this specimen. 



The body tapers towards the tail, which ends in two fairly 

 short, slender cirri, between which is a median papilla which 

 is somewhat bulbous in appearance. The anal cirri have 

 only four or tive articulations, which are somewhat longer 

 than those of the dorsal cirri. All the natural colour of the 

 animal has been destroyed, but from the account given in 

 the Monograph t it is as follows : — " Dorsum pale anteriorly, 

 marked transversely by more than a dozen madder-brown 

 bands, the anterior being double. The rest of the dorsum 

 is opaque yellowish white (from the viscera), paler at the 

 sides and posteriorly. The under surface is pale anteriorly, 

 pale orange throughout the greater part of its length, and 

 translucent towards the tail.'-' Each segment is distinctly 

 marked off from its neighbours and the dorsal cirri are 



* Vide ' Mouo^a-aph,' vol. ii. part i. pp. 190-1. 

 t ride ' Monograph,' vol. ii. part i. p. 193. 



