A. E. Verrill — North American Cephalopods. 413 



The specimens are both males, but show no positive eviflenee of 

 hec'toeotylization. Tlie body is long, somewhat fusiform, slightly 

 smaller in advance of the middle. The tissues are exceedingly thin, 

 delicate, pale, and translucent, so that the pen and other organs can 

 be seen through the mantle. Anteriorly the edge of the mantle is 

 attached to the head, medially, by a muscular commissure, and there 

 is no free edge (such as D'Orbigny figures in T. pavo) at the narrow 

 middle portion of this band. This commissure is broader within the 

 mantle, and there is another large, oblique, muscular commissure, ex- 

 tending forward to the edge of the mantle, on each side, extensively 

 uniting the inner surface of the mantle to the sides of the sij^hon. 

 These commissures leave only a rather narrow opening to the gill- 

 cavity, on each side, and one small ventral one, and the interior ven- 

 tral cavity is partitioned off from the lateral ones. 



The siphon is large, projecting forward between the lower sides of 

 the large eyes ; it has no valve in the ordinary place, but toward the 

 base, on the dorsal side, there are two erect, rounded, ear-like flaps, 

 each with a small papilla (^"), and a rounded, valve-like, raised median 

 fold and a central papilla (i) in front of them. (PI. LV, fig. 2d.) 



The caudal fin is comparatively small, narrow-ovate, tapering to a 

 short, blunt posterior end, and with the anterior lobes narrowed and 

 scarcely projecting beyond the insertions. The eyes are very large 

 and prominent, occupying the whole of the sides of the head, wide 

 apart dorsally, but nearly in contact beneath ; eye-lids thin, entire. 



Arms rounded, rather slender, tapering to slender tips; those of the 

 third i^air are much the longest, and like the second pair, bear along 

 the distal half suckers much larger than the proximal ones; tips short, 

 with few small suckers. The dorsal and ventral arras are about equal, 

 and not much more than half as long as the thii*d pair; they bear 

 smaller suckers, in two rows, regularly decreasing distally. The sec- 

 ond pair is intermediate in length between the 1st and 3d pairs, with 

 two rows of larger suckers on the outer half, suddenly decreasing dis- 

 tally, with minute ones close to the tip. The large suckers (fig. 26, c) 

 on the second and tbii-d pairs of arms are much larger than the others, 



excellent condition, many kinds of free-swimming deep-sea animals, not otherwise 

 obtainable, or if taken in the trawl, crushed by the great masses of fishes, echinoderms, 

 actiniae, etc., usually taken in every haul, in these waters. 



Among the things captured in the "trawl-wings" are not only several cephalopods 

 (iucludiug Alloposus, Lesioteuthis, Eossia), but Cymbulia calceolus and other Pteropods ; 

 vast numbers of Sagitta, one of them bright orange-colored; numerous species of 

 Copepod Crustacea, some of them of great size ; Schizopods ; Salpee ; Acalephs, in- 

 cluding one very remarkable new form of Siphonophora. etc. 



