26 bulletin: museum of comparative zoology. 



Riglit. Left. 



Length of first arm II 10 



Length of second arm 16 16 



Length of tliird arm 17 17 



Length of fourth arm II II 



Length of tentacle 13 13 



The following discrepancies between the above account and that given by 

 Grant seem worth mentioning. The arms are a little larger than would corre- 

 spond with the measurements given in Grant's text, but in the figure the arms 

 are shown as larger than stated in the text. The tentacle is much longer in 

 Grant's figure and description than in the " Albatross " specimens, but this 

 organ varies so much in this respect both during life and after death according 

 to preservation that a difference in this respect can hardly invalidate an identi- 

 fication based on so many resemblances. The head is sunk back into the 

 mantle-cavity and hence the waist-like constriction behind, the eyes, shown in 

 Grant's figure, does not appear; this again is merely a matter of contraction 

 of the tissues. 



The nomenclature of this interesting form demands, perhaps, a few words of 

 explanation. The generic name Euprymna wiis first proposed by Steenstrup 

 in the Latin summary appended to his paper on the " Mediterranean Species 

 of Sepiola " ('87). Speaking of the short-finned forms (" species brevipinnes ") 

 he says that they approach the typical species of the genus Inioteuthu Yerrill, 

 "dum ab atypicis speciebus ejusdem generis (/?i. Morsei, stlienodactyla, bursa, 

 cet. propter connexionera latam capitis cum pallio et tentaculorum miram 

 formationem ad genus novum, Euprymnam mihi dictum, referendis) valde 

 recedunt." 



In a subsequent paper ('87 a, p. 88 [42]) he recurs to the same subject as fol- 

 lows: " The other Japanese Sepiolid, In. MorseiVerr., only provisionally referred 

 by Professor Verrill to the genus Inioteuthis, only known to him in the shape 

 of a single female exainide, is the most northeasterly form yet discovered of a 

 series of very plump, thick-set Sepiola.s, which seem to occur in all zones of the 

 Inclian Ocean and South Sea, and of which the most southwesterly representa- 

 tive yet known to me is the Sepiola stlienodactyla from Mauritius, described and 

 depicted more than fifty years ago (1833) by Prof. Robert Grant in the Trans. 

 Zool. Society, Vol. 1. All the individuals of this thick-set group of Sepiulas 

 are characterized by a very broad ligament between the mantle and head, as 

 has been mentioned by Verrill in the case of In. Mormi, Verr., and as is 

 recorded for thi-i species or one closely allied to it by W. Hoyle (Challenger 

 Ex[mI. Cephalop., Plate XLV., Fig. 1) and by Appellof {Op. cit., ['86] 

 Plate II.), and as i.'^ ecjually strongly emphasize<l both in text and figure by 

 Robert Grant in the case of Sepiola sthenodactyla (Plate 11, Fig. 1), thev are 

 especially remarkable for the stout, swollen tentacular clubs, which have a 

 velvety appearance on account of the hair-like thinness of the sUilks of the 

 suckers, and the (almost or cjuite) rudimentary condition <>f the suckers them- 

 selves as figured by Iloyle in the case of In. bursa, Pfeff., Plate XIV., Figs. 4-8. 



