204 JOURNAL OF CONCHOLOGY, VOL. 10, NO. 7, JULY, I902. 



-; Arms of the third pair with only a narrow niar- 

 1 9 I ginal expansion ; length of mantle rarely ex- 



V. ceeding 0*25 m. - - - - - 21 



Size large, when full grown about i m. in length; 

 connecting apparatus of four or five suckers 

 or pads reaching some distance down the stem 

 from the club of the tentacles Sthenoteuthis pteropus 



Size smaller, length rarely exceeding o'3 m. ; con- 

 necting apparatus of three suckers and pads 

 close to the root of the tentacular club 



Sthenoteuthis hartrami 



Tentacular suckers extending down the stem 

 almost to the roots ; funnel groove with folds , 



OiiwiastrepJies sagittatus 



Tentacular suckers confined to the club ; funnel 



groove smooth - - - , - 22 



Horny ring of tentacular suckers smooth ; of ses- 

 sile arms with six conical teeth on the distal 

 semi-circumference - - - I/lex coindeti 



Horny ring of tentacular suckers and of those of 



the sessile arms toothed like a saw Todaiopsis eblaiuc 



\ Suckers in two rows {Polypus) - - - 24 



\ Suckers in a single row - - Moschites cirrosa 



Littoral ; size up to two feet or more in total 

 length ; length of arms about four times that 

 24 - of mantle - - - Polypus vulgaris 



Deep-sea ; size not exceeding six inches ; length 



of arms about three times that of mantle Polypus arcticus 



Bibliography. 



Agassiz, L. ['48]. Nomenclator zoologicus, Index universalis. Solo- 



duri, 1848. 

 Ball, R. ['41]- On a species of Loligo found on the shore of 



Dublin Bay. Proc. R. Irish Acad., vol. i, p. 362-364, figs. 



1-7, 1841. 

 Delle Chiaje S. ['29]. Memorie sulla storia e notoniia degli 



animali senza vertebre del regno di Napoli, vol. 4. Napoli, 1829. 

 Ferussac & d'Orbigny. ['35]. Histoire naturelle g(3ndrale et parti- 



culiere des Cephalopodes ac^tabuliferes, vivants et fossiles. Paris, 



1835-48. 

 Fowler, G. H. ['97]. Contributions to our knowledge of the 



Plankton of the F^roe Channel. Proc. Zool. Soc, 1897, p. 523-5261 

 GiRARD, A. ['90]. Nota sobre os cephalopodes de Portugal. Joru. 



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