No. 2310. NEW CEPHALOPODS FROM THE PACIFIC— SASAKI. 171 



4. CHUNELLA DIAPilANA (Hoyle). 



Japetella diaphana Hoyle, Ann. Mag. Nat. Hist., ser. 5, vol. 15, 1885, p. 232. 

 Elcdonella diaphana Hoyle, Challenger Ceplialopoda, 1886, p. 107, pi. 9, figs. 3-6. — 



JouBiN, Princess-Alice Cephalopoda, 1900, p. 37, pi. 2, figs. 5-7.— Hoyle, 



Albatross Cephalopoda, 1904, p. 22. pi. 5, fig. 11. 

 Bolitaena diaphana Chun, Cirrothauma, 1911, pp. 15-20; figs. 7, 8. 



Station 4956 (off Kii Province). An immature specimen. Cat. 

 No. 332924, U.S.N.M. 



Tiiis specimen agrees well with Hoyle's description. As com- 

 pared with Chun's illustration the optic ganglion is a little too broad, 

 and the optic nerve slender, but no difference otherwise could be 

 made out. 



Family ARGONAUTIDAE Cantraine. 



Subfamily Argonautinae Berry. 



Genus ARGONAUT A Linnaeus. 



5. ARGONAUTA HUNS Solar.der. 



Argonauta Mans Ferussac and d'Orbigny, Cephalopodes ac^tabulifferes, 1838, 

 p. 174, pi. 5.— Gray, British Museum, 1849. p. 33.— Tryon, Manual Couch- 

 ology, vol. 1, 1879, p. 136, pi. 46, figs. 100-102. — Ortmann, Japanische Cephal- 

 opoden, 1888, p. 641. — Hoyle, Albatross Cephalopoda, 1904, p. 11. 



Station 5081 (Yenshu-nada). One young female. Cat. No. 



332952, U.S.N.M. 



6. ARGONAUTA BiJTTGERI Maltzan. 



Argonauta bottgeri Smith, Ann. Mag. Nat. Hist., ser. 5, vol. 21, 1887, p. 409, 

 pi. 17, figs. 1-6.— Dall, Albatross Report, 1908, pp. 226, 229.— Berry, Hawaiian 

 Cephalopoda, 1914, pp. 277-280, textfigs 3-7, pi. 48, fig. 5.— Massy, Antarctic 

 Expedition Report, 1916, p. 143, textfigs. 1, 2. 



Station 4952 (east of Osumi Prov.). Two females. Cat. No. 



332953, U.S.N.M. 



Of the said two specimens the larger approaches A. Mans in that 

 the ribs of the shell are relatively few, and the granules on its sides 

 comparatively rare. As compared with Berry's illustration, the pads 

 of the funnel organ are narrower. The smaller specimen is very 

 small, the shell measuring only 25 mm. in length, yet it bears already 

 egg-clusters within the sheU; which seems to be a characteristic of 

 the species so far as I have been able to ascertain. 



Family POLYPODIDAE Hoyle. 



Genus POLYPUS Schneider. 



7. POLYPUS PAVUS Sasaki. 



Polypus parvus Sasaki, Annot. Zool. Japon., vol. 9, 1917, p. 365. 



Station Akune, Satsuma. One fem.ale. Cat. No. 332964, U.S.N.M. 

 Station Shimizuminato. Two females and males. Cat. 332965, 

 U.S.N.M. 



