NOTE ON A JARGE SQUID. 



317 



to tlie cavity outside the bridle, whicli opens by the " ouverture 

 anale '' of D'Orbigny (1, p. 342). At the top of the siphon pit are 

 seen folds which correspond pretty closely, but not exactly, to those 

 figured for this species by Steenstrup (2, p. 79, fig. 1). There are 



iatJLd. 



valve. 



Fig. 4. — View of siphon pit, the siphon being bent down so as to expose it. out. 

 ir., outer bridle ; iw. ir., inner bridle; out. ap., outer aperture ; <i. ct^., aperture 

 in dorsal or inner widl of siphon; c. fid., central fold; lat.fld., lateral fold; 

 J)., shallow pocket or velum. 



eight grooves within the central space, bounded by a U -shaped fold 

 or velum, and four folds on either side outside it. Steenstrup 

 figures only twelve folds in all. 



The specimen before us, then, agrees with Prof. Steenstrup's 

 species, 0. pteropus, in size, in having very well -developed lateral 

 membranes to the arms, a nearly straight mantle edge, numerous 

 folds in the siphon pit, and in possessing a particular arrangement 

 of the connective apparatus. This species, which inhabits the 

 Atlantic, has rarely been recorded from our shores. Mr. E. A. 

 Smith, of the British Museum, has kindly given me the following 

 information concerning two specimens now in the Natural History 

 Museum. One is an incomplete specimen obtained on November 

 19th, 1883, at Scarborough : it was 52 inches long (arms included), 

 25 inches in girth, and 22 inches across the fins. The second 

 specimen is a perfect one, captured in the North Sea, February 27th, 



