CEPHALOPODA OF THE HAWAIIAN ISLANDS. 325 



Type.— Catalogue No. 2 14381, United States National Museum [S. S. B. 238]. 



Type locality. — Albatross station 3989, 385 to 733 fathoms, vicinity of Kauai Island, coral, sand and 

 rock bottom, June n, 1902; one specimen. 



Distribution. — Hawaiian Islands (Albatross). 



Specimens examined. — The type is unique. 



Remarks. — It was at first thought that this specimen might be referable to the T. appellofi of Pfeffer 

 and was indeed so listed in a preliminary paper, but a more careful study of details, particularly those of 

 the tentacular armature, has convinced me that the present species is distinct and stands rather nearer 

 to M. Joubin's T. caroli (1900, p. 64), from which it differs in the relatively larger fins and shorter 

 and differently armed tentacle club. 



The latter structure is a curious affair and is better to be understood from the figure than from my 

 description. It offers several apparent divergencies from that of T. caroli as figured by Joubin (1900, 

 pi. j 1, fig. io), especially in the fixing apparatus, for T. caroli is represented as having but seven suckers 

 (pads are omitted from the drawing but mentioned in the text). Furthermore, the suckers of the club 

 itself are very different in number and arrangement, although the two forms agree in the presence of but 

 a single series of hooks. a In T. caroli the fifth hook from the base attains the maximal proportions, while 

 in our species it is the sixth, and the change in size at this point is conspicuously more abrupt. 



It is, however, not at all impossible that the single row of hooks and the broad fins are juvenile char- 

 acters, the former being intermediate between the hookless condition described by Pfeffer as Steen- 

 strupiola (cf. Pfeffer 1900, p. 156) and the normal adult, in which case the Hawaiian specimen may after 

 all prove to be closer to the T. peratoptera d'Orbigny, a Chilean species which was indeed originally 

 figured with three rows of suckers and but one series of hooks (d 'Orbigny 1835, pi. 3, fig. 6), though since 

 united by d'Orbigny himself with the T. plaiyptera of the same region. 



T. appellofi has fins of somewhat similar proportions, but the structure of the tentacle club is totally 

 different. 



Family ENOPLOTEUTHID^ Pfeffer 1900. 



Erwptoteutkidtp Pfeffer 1900. p. 152, 163. 

 Enoploteuthida* Chun 1910, p. 52. 

 EnopIoUuthidce Pfeffer 1912, p. 118. 



Animals of small to moderate size. Arms with two rows of suckers, part of which typically are 

 modified into hooks. Tentacles with clubs little or not at all expanded; their suckers in four rows (one 

 or more of these often suppressed in the adult) and usually part of them transformed into hooks; a carpal 

 fixing apparatus present comprising a few suckers and pads. Buccal membrane eight-pointed. Gladius 

 feather-shaped; with broad somewhat angular wings and no end cone. Photogenic organs are almost 

 invariably present on the ventral aspect of the eyeball, and in addition may occur within the mantle 

 cavity or scattered over the ventral surface of the outer integument. 



Subfamily ENOPLOTEUTHIN<E (Chun 1910) Pfeffer 1912. 



Enoplomorpfur Chun 1908, p. 86. 



EnoploleutktruE Tribus Etwplomorptue Chun 1910. p. 56, 78. 



EnoploteutkiiKE Pfeffer 1912, p. 124, 125. 



Body more or less pointed posteriori}' but not spitlike. Fins large and usually sagittate. Buccal 

 membrane free ; dorsal lappets well separated. Photogenic organs occur, often in large numbers, on the 

 ventral aspect of the mantle and usually the head and arms as well ; in most genera a conspicuous single 

 series of large organs is found on the ventral periphery of the eyeball; no luminous organs in the pallial 

 chamber. 



o Joubin (op. cit., p. 65) states that the hooks of T. caroli are in two rows, but it seems to me that the "premiere serie" 

 described as "trespetits, longuement ptkioncules" are better interpreted as suckers as I have done. 



