Boone, Mollusca, Cruises of "Ara'* and "Alva" 339 



The youngest specimen has a mantle length of 2.5 millimeters, 

 is 2 millimeters long to the base of the dorsal pair of arms. The 

 sessile arms all are embryonic and have the web deeper in ratio 

 between the bases of the arms than is true of the older larval 

 stages. This specimen has the tentacular arms extended for a 

 length equal to three-fourths of the total length of the body and 

 head, but unfortunately both arms are broken off distally. 



References: Onychoteuthis morisii, Verany, J. B., Mem. Acad. 

 R. Sci. Torino, ser. 2, t. I, 1837, p. 2, taf . 2A. 



Abraliopsis pfefferi, JoUBiN, L., Bull. Soc. Sci. et Med. de I'ouest, 

 Rennes, 1896, pp. 19-35, figs. 1-10. 



Abraliopsis morisii, Chun, C, Wiss. Ergeb. Deutschon Tiefsee 

 Exped. "Valdivia," 1898-99, Die Cephalopoden, Bd. XVIII, 

 teil I, II, 1910, p. 78, taf. 5, 6, 7, 8, 9, 10 and p. 102, pi. — , taf. 7, 

 figs. 1-13. — Naef, Adolf, Fauna u. Flore des Golfes von 

 Neapel, Die Cephalopoden, monogr. XXXV, 1923, p. 285, text 

 figs. 137, 138, 139, 140, 141, 142. (This contains exhaustive 

 diagnosis and synonymy.) 



Order: DIBRANCHIATA 



Suborder: Decapoda 



Family: ONYCHOTEUTHIDAE 



Genus: ONYCHOTEUTHIS Lichenstein 



Onychoteuthis banksii Leach 



Plate 104, volume IV 



Material examined : Eleven young specimens 2 to 3.5 inches 

 long, taken with marine light at the "Ara's" anchorage, in 15 

 fathoms, Sindangan, northwest Mindanao, Philippine Islands, 

 January 17, 1929. 



Remarks : This sea-arrow, remarkable for its nearly cosmo- 

 politan distribution in all the oceans, from the Arctic to the Cape 

 of Good Hope and southern reaches of the Indian Ocean and also 

 throughout the Pacific and Atlantic Oceans, is again recorded in 

 the Vanderbilt Marine Museum, this time from the Sulu Sea, Zam- 



