24 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4, 



by the peculiarity of one of the arms possessing a double set of 

 suckers. 



LoLiGo PATAGONiCA, sp. n. (Plate III. figs. 2-2 J.) 



Body cylindrical, tapering gradually behind, about four times as 

 long as broad. Upper margin produced to an acute point on the 

 dorsal side, broadly sinuated beneath. Fins occupying a little less 

 than half the length of the body, rhomboidal, with the lateral angles 

 only slightly rounded, joining the body without any superior slit. 

 Head a little narrower than the body. Of the arms the upper or 

 dorsal pair are the smallest and shortest, with an acute membranous 

 inner edge. Second pair rather longer and thicker, having the inner 

 or upper edge more rounded than the outer, which is acutely carinate. 

 Third or lower lateral pair largest and longest of all, rounded on 

 the upperside, and bearing a broad membranous expansion on the 

 lower edge extending from the tip to the base, where it joins a 

 similar membrane running up the side of the basal arms. These 

 are nearly as thick as the preceding but rather shorter, and have a 

 very acute carinated inner edge. Cupules on the upper and lower 

 pairs rather smaller than those on the lateral pairs. Horny rings 

 very oblique, furnished on one side with five or six rather squarely 

 cnt teeth. Buccal membrane produced into seven prominent lobes, 

 whereof the two subbasal pair are the most conspicuous, within 

 bearing a few minute suckers upon very long pedicles. 



Tentacular arms slender, tapering at the ends. Club but little 

 expanded, furnished with four rows of cups, whereof the two inner 

 are vastly larger than the outer ; they alternate with each other and 

 also with the small outer cups, so that the latter on one side are 

 on the same transverse line as the more remote series of large ones. 

 The length of the club is about five twelfths of the entire length of 

 the tentacle. The horny ring has about from twenty to twenty-four 

 blunt teeth. 



The colour of the two specimens is purplish buff, varied with 

 numerous close-set, generally ovate, largish spots of a purple tint, and 

 of different sizes, upon the back, the sides, and crown of the head. 

 Ventral surface and beneath the fins destitute of spotting. 



Shell pennate ; shaft thin, roundly keeled exteriorly and grooved 

 on the opposite side ; expanded j)ortion or vane rather broad, 

 equalling in this respect rather less than one sixth of the length. 



Dimensions. Length of body 62 milHms., width 14; fins 27 

 long and 30 in diameter across the back from one lateral angle to 

 the other ; tentacles 38 long; longest arm 27. 



Hab. Alert Harbour, Trinidad Channel, west coast of Patagonia. 



Only one species of this genus has been hitherto recorded from 

 the west coast of the South-American continent, namely Loligo 

 gahi, found on the Chilian coast. In that species the fins are 

 considerably shorter in proportion to the length of the body, join 

 the back nearer the centre, and have rounded upper and lateral 

 angles. The arms, too, offer certain differences; and the number of 

 teeth on the horny rings of the larger cups on the tentacular club is 



