2 Prof. M'lutosli's Notes from the 



and S. pavonina, Sabella reniformis and S. saxicava, and 

 Fabricia umphicora and F. johnstoni. In Malmgren's 

 ' Annulata Polycliseta/ of Spitzl)eri;en, Greenland, Iceland, 

 and Scandinavia, nineteen Sabellids (including Mynicola) 

 are entered, and some of these appear to be purely northern 

 in distribution, and do not occur in our waters. Only six. 

 are entered by Dr. Johnston in the ' Catalogue of Worms 

 in the British Museum' (1865), but two refer to the same 

 form, viz., Sabella penicillus, and another [S. savignii) is 

 uncertain. 



Six species, including Myxicola steenstrvpi, are recorded 

 by The'el * (1879) from Nova Zerabla. Langerhans (1880) 

 found ten species at Madeira. Abont twenty-seven species of 

 Sabellids occur in the laborious memoir of Miss Katherine 

 Bush t from the vast area of the Pacific. Fifteen species 

 occur in the careful ' Survey of Clare Island, on the rich 

 West Coast of Ireland ' by Mr. Southern (1914), several not 

 having hitherto been found in Britain. Thirteen species of 

 Sabellids are entered by Prof. Fauvel (1914) in his tine work 

 on the Polychseta procured by the Prince of Monaco in his 

 yachts 'Hirondelle' and 'Princess Alice.' In the recent 

 (1915) list of the Polychaita procured at Plymouth by 

 Dr. Allen, thirteen species are entered, and a lew are ex- 

 clusively southern forms. Comparatively few species {e.g., 

 from two to five) pertaining to this family, as a rule, occur 

 in local catalogues in the British area. These will be 

 elsewhere alluded to. Moreover, it is perhaps more difficult 

 to separate the Sabellids by their bristles and hooks than, 

 for instance, the Terebellids, and coloration disappears, as a 

 rule, in spirit-specimens. 



The first form is the Avidely distributed Sabella penicillus, 

 T . When the branchiae of this species are thrown off the 

 cephalic region presents a truncated surface, in the centre of 

 which is a frilled eminence, which, when carefully inspected^ 

 shows two lateral membranous wings, which unite in the 

 middle line below and send a process ventrally between the 

 two great ventral laminae; whilst the ui)per edges pass above 

 the mouth in a series of short frills. In the mid-dorsal line 

 over the mouth is a triangular flap with an acute apex, the 

 base-of which is grooved dorsal ly, the whole resembling an 

 epistome. Dorsally the cephalic plate is deeply grooved by 

 the dorsal furrow, the firm and thick edge of the rim which 

 carries the branchiae being severed and neatly curved on 



* Kong]. Sv. Vet.-Akad. Handl. I3d. 16, No. 3, p. 65. 

 t 'Harriinaii Expedition to Alaska' (New York, 1905). 



