6 HOYLE, Type Specimen of Loligo eblance. Ball. 



It will be seen that in Ball's specimen the fin is 

 proportionately shorter and the arms are proportionately 

 longer than in Girard's type, but this is what would be 

 expected in a less mature example. 



3. Girard records the first arm as shorter than the 



fourth, whereas in Ball's specimen I have entered 

 them as equal, but, as the differences are no 

 greater between the pairs of arms in the one case 

 than between two arms of the same pair in 

 the other, the matter cannot be regarded as of 

 any material consequence. 



4. The hectocotylisation is about equally developed 



in the two arms of the fourth pair in Ball's 

 specimen, but this is a sign of immaturity, as I have 

 shown elsewhere (1891). 



5. The apical group of suckers in the tentacle is not 



visible owing to the shrinking of the tip, but I 



do not find it present as a separate group distinct 



from the normal four series in well-preserved 



specimens of approximately the same size from 



Naples. 



Dr. Jatta (1896, p. ^6) has given a long and elaborately 



illustrated description of Neapolitan examples, which he 



refers to T. veranyi Girard. The principal points which 



call for notice in his description are as follow : — 



(i). The head is stated to be vmcJi broader (" molto 

 piu largo") than the mantle-opening. This agrees with 

 his figure and with the specimens I have received from 

 Naples, though not with Girard's description nor with 

 Ball's type, but it must be remembered that this latter has 

 had the jaws removed, so the head may have shrunk. 



(2) The horny ring of the arm-suckers is represented 

 as toothed all round the circumference (//. 12. fig. 10); 



