66 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Explanation of Plates VI, VII, VIII, IX. 



Plate VI. — Fig. 1. — Argonauta species, female. Mantle laid open to show the 

 male hectocotylus in situ within the cavity [S. S. B. 403] (X 1\). 

 Fig. 2. — Polypus oliveri Berry, female. Dorsal aspect of type [S. S. B. 405], 

 about natural size. 



Plate VII. — Fig. 1. — Nematolampas regalis Berry. Distal portion of right 



third arm of type [S. S. B. 409], photographed by reflected light from a 



mount in balsam (X 2). 

 Fig. 2. — Nematolampas regalis. Proximal portion of same preparation 



(X 8J). 

 Fig. 3. — Nematolampas regalis. Median portion of the terminal filament 



of the right third arm (X 8|), photographed from the same preparation. 



Plate VIII. — Fig. 1. — Lampadioteuthis megaleia Berry. Dorsal aspect of type 



[S. S.B. 416] (X U). 

 Fig. 2. — Ventral aspect of same, same scale. 

 Fig. 3. — Lampadioteuthis megaleia. Tentacle club of type, from mount in 



balsam (X 7). 

 Fig. 4. — Lampadioteuthis megaleia. Base of tentacle from same preparation 



(X 7), showing the two basal photophores. 

 Fig. 5. — Nematolampas regalis Berry. Subocular photophores from right 



eye of paratype [S. S. B. 410] (X 7); photograph of inner surface from 



mount in balsam. 



Plate IX. — Fig. l.—Abraliopsis hoylei Pfeffer ?. Ventral aspect of immature 

 female [S. S. B. 400] (X 2). 



Fig. 2. — Megalocranchia pardus Berry. Ventral aspect of type [S. S. B. 415] 

 (X2). 



Fig. 3. — Abraliopsis (?), species. Ventral integument of very young speci- 

 men [S. S. B. 419], showing the distribution of the photogenic organs; 

 photographed by reflected light from a mount in balsam, stained with 

 Delafield's hematoxylin (X 6). 



Note. — I am indebted to my friends, Edward A. Cornwall and Leroy Childs, 

 for most of the photographs used in the accompanying plates. Thanks are like- 

 wise due to both Messrs. Iredale and Oliver for many incidental favors. 



