52 



PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



Genus LAMPADIOTEUTHIS new genus. 



Body loliginiform. Fins broad, subsagittate, terminal; slightly 

 surpassing the body posteriorly. 



Arms with two rows of minute suckers, but no hooks. Tentacle 

 clubs not expanded; armed with four rows of smaM suckers. 



Buccal membrane eight-pointed, pale in color, but dotted with 

 numerous dark chromatophores between the trabecular. 



Photogenic organs richly developed; their distribution being as 

 follows: 1. One at the extreme base of each tentacle and four 

 along the stalk. 2. A longitudinal series of three large organs on 

 the ventral side of the eyeball (of which the median is notably the 



smallest) and a single similar organ on the 

 eyelid just back of the opening. 3. Five in- 

 trapallial organs, including 2 anal, 2 branchial 

 (very large), and 1 abdominal organ. No 

 luminous organs have been identified any- 

 where in the outer integument of the arms, 

 head, or mantle. 



Gladius comprising a rapidly tapering rha- 

 chis, free in front, but with delicate, somewhat 

 broadly angular wings along its posterior two- 

 thirds. 



Type. — The following species. 

 11. Lampadioteuthis megaleia new species. PI. VIII, figs. 1-4. 

 Animal small. Mantle firm, fleshy, cylindro- 

 conic in outline; in front rather flaring, 

 thence tapering quickly to a point. Fins 

 large and fairly thick in proportion to the 

 small size of the body; slightly more than 

 half as long as the mantle; each fin about a 

 fifth longer than wide; strongly united in the 

 median line posteriorly, where they extend 

 slightly past the tip of the mantle; triangular, 

 the posterior margins nearly straight and 

 converging to a very obtuse point; anterior 

 margins almost straight on the outward edges, 

 but somewhat squarely arcuate in front, and 

 thence descending toward the body so as to 

 form small lobes. 



Head large, almost as wide as the flaring 

 mantle opening, and wider than the body is 



Fig. 4. — Lampadioteu- 

 this megaleia, semi- 

 diagrammatic repre- 

 sentation of cut ire 

 animal from the ven- 

 tral aspect, to show 

 the distribution of 

 the photocgeni or- 

 gans, about natural 

 size. 



