404 
A. E. Verrill — Earth American Cephalopods. 
Enoploteuthis Cookii Owen. OSee p. 241.) 
Enoploteuthis Cookii Owen. Trans. Zool. Soc. London, xi. p. 150, pi. 30. figs. 1-3, pL 
31. figs. 1-4. pi. 32. figs. 1-6. pi. 33, fig. 1 (restoration), June. 1881. 
Seppia unguiculata Molina, 1810 (no description). 
Enoploteuthis Molina D’Orbigny, Ceph. Acetab.. p. 339, 1845-1848. 
? Enoploteuthis Hartingii Verrill. this vol., p. 241, pi. 24. figs. 4—4'., 1880. 
Professor Owen lias very recently described in detail and has given 
excellent figures of most of the existing parts of this large and 
remarkable cephalopod, which have so long been preserved and have 
so often been referred to, but hitherto have never been scientifically 
described. (See p. 241). It is to be regretted, however, that Professor 
Owen has neither described nor figured the teeth of the radula, in a 
manner to enable it to be used as a systematic character. His state- 
ment in regard to it is only of the most general kind, and shows only 
that there are seven rows of teeth. It is also a matter of surprise 
that he has not compared any of the described portions with the 
corresponding parts of an equally large and very closely allied 
Enoploteuthis carefully described and figured by Ilarting in 1861 
(see p. 241), and to which I have given the well-merited name, 
E. Hartingii. 
It is not improbable that the two forms are really identical, but 
this cannot be certainly determined from the figures, because the 
corresponding parts are not always represented in the same positions, 
and it is uncertain whether the corresponding arm is preserved in 
the two cases. 
Ilarting figures, rather poorly, the teeth of the radula, which 
appear to be very peculiar, if his figure is correct (see my PI. XXIV, 
fig. 4 h). 
The shape of the mandibles appears to be different in the two 
species, however, and the large hooks also differ in form. 
Histioteuthis Collinsii Terrill, (pp. 234, 300). 
The teeth of the odontophore, originally described and figured 
(p. 237, PI. XXXVII, fig. 5), were not the most developed of those on 
the same odontophore. On the middle and best developed parts, the 
bases of the central and inner lateral teeth, when seen in a front view, 
are broader than indicated in the former figures, in which they are 
seen nearly in profile. The median tooth has a long, acute, central 
denticle, but no distinct lateral denticles, the broad, short base hav- 
ing the outer angles only slightly prominent, or not at all so; the 
inner lateral teeth are nearly as large, with one similar large denticle, 
