1912.] NATURAL SCIENCES OF PHILADELPHIA. 399 



Material Examined. — 

 No. Where Author's 



Sp. Locality. Sex. Collectors. deposited. Register. 



2 Onomichi, Bingo cf 9 Jordan and L.S.J.U., 365 



Snyder Cat. 2,031 



2 Nagasaki; Hizen 9 Jordan and L.S.J.U., 366 



Snyder Cat. 2,032 



Loligo bleekeri Keferstein, 1866. 



Loligo Bleekeri Keferstein, 1866, p. 1402, pi. 122, figs. 9, 10; pi. 127, fig. 14. 



Loligo Bleekeri Tryon, 1879, p. 149, pi. 57, figs. 185, 186. 



Loligo Bleekeri Brock, 1882, p. 604. 



Loligo Bleekeri Appellof, 1886, p. 31, pi. 1, figs. 7-10. 



Loligo bleekeri Hoyle, 1886, pp. 30, 158, etc. 



Loligo bleekeri Ortmann, 1888, pp. 664, 665 (mere note). 



Loligo bleekeri Joubin, 1894, p. 56. 



Loligo bleekeri Wiilker, 1910, pp. 10, 36, etc., pi. 4, fig. 30 (digestive system). 



Distribution. — Aburatsubo, Sagami (Wiilker); Nagasaki, Hizen 

 (Appellof). Amboina (Joubin). 



Loligo sumatrensis d'Orbigny, 1839. 



Loligo sumatrensis d'Orbigny, in d'Orbigny and Ferussac, 1839, p. 317; 



Calmars, pi. 13, figs. 1-3 (fide Hoyle). 

 Loligo sumatrensis d'Orbigny, 1845, p. 349. 

 Teuthis sumatrensis Gray, 1849, p. 77. 



Loligo Sumatrensis Tryon, 1879, p. 145, pi. 58, figs. 190, 191 (after d'Orb.). 

 Loligo sumatrensis ? Appellof, 1886, p. 32, pi. 1, fig. 11; pi. 3, figs. 11-15. 

 Loligo sumatrensis Ortmann, 1888, p. 664 (merely listed). 



Distribution. — Nagasaki, Hizen (Appellof). Sumatra (type local- 

 ity, d'Orbigny). 



Loligo japonica Steenstrup, 1885. 



Loligo japonica Steenstrup, MS., in Hoyle, 18856, p. 187. 

 Loligo japonica Steenstrup, MS., in Hoyle, 1885cZ, p. 290. 

 Loligo japonica Hoyle, 18S6, pp. 30, 157, etc., pi. 24, figs. 7-15. 

 Loligo japonica Ortmann, 1888, p. 663. 



The nearest ally of this distinct little species is the next following 

 and it now appears quite likely that the two are identical. 



Distribution. — Yokohama (Hoyle); Aburatsubo, Sagami (Wiilker). 



Loligo tetradynamia Ortmann, 1888. 



Loligo tetradynamia Ortmann, 188S, p. 659, pi. 23, figs. 4a-ik; pi. 25, fig. 1. 



This small and curious species, although admittedly showing 

 close affinity to L. japonica, was differentiated by Ortmann on* the 

 following grounds : 



1. The suckers of the lateral arms are very much larger than 

 those of the dorsal and ventral pairs, a condition prevailing equally 

 in both sexes. 



2. There are no suckers upon the buccal membrane. 



3. The arms of the third pair do not possess a membranous keel. 



4. The structure of the hectocotylus is different. 



