308 BUI.I<ETIN OF THE BUREAU OF FISHERIES. 



The interesting discovery of somewhat larger specimens of apparently the same species by the 

 Albatross as far north as Monterey Bay considerably extends the known range and enables me to add 

 numerous important details to the information previously published as well as to present a fairly com- 

 plete series of illustrations. 



It will be noticed that my description fails to tally, however, with that of Pfeffer in quite a number 

 of more or less weighty particulars. The umbrella in the Albatross specimens seems to be less developed, 

 but I am inclined to think that this is to be explained by the larger size of the latter. More difficult to 

 understand is the fact that I have been unable to identify any structures corresponding to the rows of 

 tubercles ("Hockerreihe") described by Pfeffer with much stress as occurring on the arms and the 

 dorsal surface of the mantle along the median line; but this, too, may tiunout to be a juvenile character. 



In other respects Pfeffer's account fits the Californian examples with fair accuracy, even to the 

 extraordinary asymmetrical development of the head and its organs. The latter is certainly a most 

 astonishing condition, the function of which, in the light of our present knowledge at least, seems utterly 

 inexplicable, nor am I aware that any theory regarding it has ever been advanced. 



Despite its known abyssal habit, it came as more or less of a surprise to find this beautiful Panamic 

 species associated in the Albatross collection with the Arctic Gonatus, and indeed taken in at least one 

 instance in the selfsame haul. It is without a doubt one of the most important and interesting additions 

 to the Californian fauna which has lately come to notice. It is in every way distinct, a most remarkable 

 creature, and not to be confused with any other form. 



Family GONATID^ Hoyle, 1886. 

 Genus GONATUS Gray, 1849. 



Gonatus Gray, 1849. p. 68. 

 Lestoteulhis Verrill, 1880. p. 251. 

 Chiloteuihis Verrill, 1S80. p. 293. 

 Cheloteutkis Verrill, 1S81. p. 109. 

 Gonatus Hoylc. 1SS6. p. 174. 

 Hoyle, 1889, p. 117. 



Animal of moderate size , loliginiform . Arms short , stout ; the ventral pair with four rows of suckers, 

 the remaining arms with two lateral rows of suckers and two median rows of hooks. No hectocotylization. 

 Tentacles with numerous rows of suckers and a few median hooks; fixing apparatus comprising a large 

 series of pads and suckers extending from a point low down upon the stem nearly to the middle of the 

 terminal expansion. 



This curious group is known to include but a single aberrant species, but the latter is so unique in its 

 remarkable assemblage of characters that its treatment in a genus by itself is clearly justifiable. 



Type, Onychotcuthis} amcena M011er, 1842 {=Sepia loligo Fabricius, I^&a=Gonatus fabricii {'Lichten- 

 stein) Steenstrup), a circumpolar species of quite wide distribution. 



Gonatus fabricii (Lichtenstein, 1818) Steenstrup, 1880. (PI. ui, fig. 1-4; pi. uii; pi. liv, fig. 1-4; pi. lv.) 



Sepia loligo Fabricius, 1780, p. 35S. 



Otiychuteuthis Fabricii Lichtenstein, 1818, p. 13 (fide Hoyle). 



Lichtenstein, 1818a, p. 223. 

 Onychoieuthis FabTicii'^\^\\CT, 1842. p. 76. 

 Onychottulhis 9 ama-no M((ller, 1842, p. 76. 



Onychoteuthis Kamtschatica Middendorff. 1849, p. 515. pi. xri. fig. 1-6. 

 Gonatus amama Gray, 1849, p. 6S. 



H. and A. Adams, 1858, i, p. 36, pi. iv, fig. 2. 



anuenus Sars, 1878, p. 336. pi. XXXI. 



amcena Tryou, 1S79, P- ^^8, pi. 73, fig. 290 (after Adams). 

 Enoploteuthis Katntsctiatita Tryon, 1879, p. 174, pi. 77, fig. 333-33S (after Middendorff). 

 Lestoteulhis KamlschaticaVeitiU, 1880, p. 251. 

 Gonatus amcenus Verrill, 1880a, p. 362 (merely listed). 



Verrill, 1881, p. 291, pi. XLV, fig. 1-2. 

 Chilotcuthis rapax Verrill, 1881, p. 293. pi. XLIX, fig. i. 

 Gonatus Fabrnit Steenstrup, 1881, p. 9, pi. i. 

 Cheloteutkis rapax Verrill, 1881a, p. no, pi. m, fig. i-if. 



