. The Cephalopoda of the Hawaiian Islands. Cephalopoda; Mollusks. 35Q BULLETIN OF THE BUREAU OF FISHERIES. mentioning, so that the formula is perhaps preferably stated as 3=4, 2, 1. (3) The horny rings of the tentacular suckers have 12 to 14 instead of 10 teeth on the upper margin. These are none of them very great differences, but seem sufficient, together with the widely separate habitats of the two forms, to render their union unjustifiable until a better representation of each is available for study. My original reference of this species to Helicocranchia %vas certainly ill advised, our sp
. The Cephalopoda of the Hawaiian Islands. Cephalopoda; Mollusks. 35Q BULLETIN OF THE BUREAU OF FISHERIES. mentioning, so that the formula is perhaps preferably stated as 3=4, 2, 1. (3) The horny rings of the tentacular suckers have 12 to 14 instead of 10 teeth on the upper margin. These are none of them very great differences, but seem sufficient, together with the widely separate habitats of the two forms, to render their union unjustifiable until a better representation of each is available for study. My original reference of this species to Helicocranchia %vas certainly ill advised, our species differing conspicuously in the larger, more elongate nonpedunculate fins, spitlike posterior continuation of the mantle, much smaller funnel, and very much larger unstalked eyes. The discovery of this species very greatly extends the known geographical range of the little group of typical Megalocranchia, but even yet the distribution of the various species is of interest because of the continuity of the respective regions occupied by them. Beginning with M. pellucida in the south Atlantic, the remaining species form a geo- graphic chain extending more than halfway around the globe. M. maxima is known only from the Cape of Good Hope, M. abyssicola Goodrich from the waters of the Indian peninsula, and the present species from the Hawaiian Islands. Because of its occupancy of so distant and isolated a region, the Hawaiian species might be expected to be the most highly differentiated member of the group, but such is very far from being the case. On the other hand M. abyssicola seems in many ways peculiar and not so closely allied to any of the other three forms as they are to one another. It has been a pleasure to associate with this interesting species the name of my friend, Dr. Walter K. Fisher, who, as a member of the staff of the Albatross during the Hawaiian explorations, had no small part in the duties of caring for and preserving the present material. Genus HELICOCRAN
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Keywords: ., bookcentury1900, bookdecade1910, bookpublish, booksubjectmollusks
