4 JAPANESE MOLLU8K8, PTEROPODA. 



OMMASTREPHIDJE. 



Ommastrephes pacificus Steenstrup. Jap. Ceph., p. 35, pi. 3, f. 8-10. 



Japan (App.). 

 Ommastrephes bartramii Lesueur. 



Japan (teste Mitsukuri & Ikeda). Seems a very doubtful identi- 

 fication. 

 Architeuthis n. sp.? Mitsukuri A Ikeda. The Zool. Mag., Tokyo, vii, p. 39, pi. 10. 



Bay of Tateyaraa, Prov. Awa, E. side Bay of Tokyo. 



Megateuthus martensii Hilgendorf. Sitzungsber. Ges. naturforsch. Fr. fieri., 1880, 

 p. 65. 



Yedo (Hilg.). 



Todarodes pacificus Steenstrup. Chall. Rep., Vol. 16, p. 163, pi. 28, figs. 1-5. 

 Inland Sea. 



TODARIDJE. 



Gonatus fabrioii (Lichtenstein) Steenstrup. ('hall. Rep., Vol. 16, p. 174, pi. . 

 Japan. 



CRANCHIID2E. 

 Loligopsis (1) chrysophalmus Tilesius. Man. Concb., p. 164. 



Japan. 



NAUTILID2E. 



Nautilus pompilius has been reported from Japan by Dunker, 

 but its occurrence there is doubtful. 



PTEROPODA. 



As these mollusks are wholly pelagic in habits, the number occur- 

 ing in Japanese waters will probably be larger than given below. 

 For literature see Pelseneer, Report on Pteropoda coll. by Challen- 

 ger. 



PTEROPODA GYMNOSOMATA. 



Several species of Pteropoda gymnosomata have been collected in 

 the N. Pacific east of Japan, but we are still ignorant of the species 

 which actually occur in Japanese waters. See Challenger Report, 

 Vol. XIX, part Iviii, p. 65. 



PTEROPODA THECOSOMATA. 



LIMACINIDJE. 

 Limacina inflata d'Orbigny. 

 Corea Strait, (St. John). 



