PROC U.S. NAT. MUS. VOL. 123 



ROPER AND YOUNG — PLATE 4 







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(3a. 



^^ h \^Xm 



Valbyteuthis danae, 47 mm ml, Ell. 34: a, b, mantle and funnel components of locking 

 apparatus; d-f, upper and lower mandibles; g, radula; h, sucker from carpus; i, sucker 

 from manus enlarged; k-n, suckers from arms i-iv; o, sucker from manus (k-o = identical 

 enlargement). 35 mm ml, Ell. 52: c, funnel organ. Chiroleuthis, "dorstopsis"-type 

 larva, 28 mm ml, Dana 1157 n: j, sucker from manus. 



