554 Prof. M'IntosL's Notes from the 



division^ are characterized by having the deutary plates of 

 the upper jaw-apparatus placed in rows one behind the 

 other^ and, moreover^ the pieces resemble each other. The 

 feet may be either single or double. Two groups likewise 

 occur in this division, viz. : (1) those in which the feet are 

 simple^ as likewise are the bristles, such as Arabella, Noto- 

 cirrus, and (Enone; and (2) those with feet having both 

 simple and compound bristles, such as Stavrocephalus. 



Grube*, again, takes Ehlers's first grou]}, Labidognat/ia,hnt 

 prefers the term Lnmbriconercida, Schmarda, for the second, 

 dividing it further into (1) those with leaf-like dorsal cirri, 

 such CEnone and Lysareta, and (2) those with small dorsal 

 cirri, e. g. Ninoe and Lumbriconereis. He agrees in making 

 the Staurocephalidffi the third group. 



In Dr. Johnston's t Catalogue of the Annelids in the 

 British Museum, two members of the Onuphidse, viz. 

 " Northia tubicola " and N. conchylega, are entered. The 

 former {Hyalincecia tubicola, O. F. M.) is free from am- 

 biguity, but the latter title probably covers two species, viz., 

 the original Omiphis tu.bicola of M. Sars, and another form 

 which may provisionally be termed 0. britannica. Of 

 Eunicidse seven are noted : but it is questionable if one 

 of these, viz. Eunice annuUcornis, is British ; whilst another, 

 E. margaritacea, cannot be identified from the imperfect 

 figure X of Dr. Thos. Williams. A single Lumbriconereid, 

 viz. Lumbrinereis tricolor, is mentioned — a species which falls 

 under the genus Arabella. 



A few other forms have been added since by Miss Florence 

 Buchanan and others, such as Eunice philocorallia, Xemato- 

 nereis unicornis, Schra., Lumbriconereis gracilis, Ehlers, and 

 Ophyroirocha. The Staurocephalidse likewise increase the 

 list by two or three species. 



As indicated in the remarks on the group in the volume 

 on the Annelids of the ' Challenger,^ considerable variation 

 occurs in most of the organs relied on by authors for specific 

 discrimination, such as the dental apparatus, the branchiae, 

 the general outline, appendages, and coloration. The bristles 

 also show a certain amount of variation, but, on the whole, 

 are fairly reliable, though it should be stated that the 

 distinctions between species in this respect, as, for instance, 



* Sitz. d. nat. Schles. Gesell. 1878, Sep. Abd. pp. 2 & 3. 



t Quite recently tlie last survivor of this amiable naturalist's family, 

 viz. a daugliter, Mrs. Bai-well Carter, passed away. She was well kuown 

 in Berwick-on-Tweed for her eflbrts to promote Natural History and the 

 interests of the Berwickshire Naturalists' Club. 



\ Ann. & Mag. Nat. Hist. ser. 2, xii. p. 408, pi. xiv. fig.. 4. 



