in the Cephalopoda. 85 



In the male of another Danish species of Loligo, which I re- 

 gard as the L. vulgaris of Lamarck and the succeeding South 

 European authors, although in particular points it does woiper- 

 fectly agree with the more detailed descriptions, I find an accord- 

 ance between the right and left arms of the fourth pair as far as 

 the eighteenth or nineteenth pair of suckers, where a jjcrceptible 

 elongation of the peduncle commences. This then increases 

 more and more towards the apex of the arm, the suckers dis- 

 appearing gradually, and the peduncle remaining as a long 

 conical papilla. The papillae are, on the whole, rather longer 

 and more powerful than in the preceding species, from which it 

 also differs in having the extremely small, ringless sucking-disks 

 visible for a somewhat longer distance, and also in that the 

 papillae of the inner series are the smallest at the commence- 

 ment, but afterwards become the longest, especially towards the 

 apex, where they bend inwards towards the median line of the 

 arm, or, as it were, stretch over towards the series of the oppo- 

 site side, on which the papillae have become shorter and thicker 

 exactly in the same proportion, and, as in the preceding species, 

 lie along the margin of the arm like the teeth of a saw. In this 

 species, also, about forty pairs of acetabula appear to be meta- 

 morphosed as above described. 



Of Loligo Pleii, D'Orb., from the Antilles, the JMuseum un- 

 fortunately possesses only a single specimen, which has formerly 

 been completely dried ; but it is still easy to disceim that in this 

 species the transformation commences with the nineteenth pair, 

 and becomes quite as striking as in the two preceding species. 



■« 



cies, which does not occur in the Mediterranean, and could therefore hardly 

 have been intended by Rondelet as his L. magna. It even appears to me 

 on the whole very doubtful whether this was a Loligo at all, both when wc 

 consider the figure {e.g. the long tentacles), and the statement regardmg 

 the fins : " pinnulae latiores sunt quam in Sepia, non totam ahum anibi- 

 entes, et in angulum acutum in lateribus dtsinentes," words which are 

 subsequently more exactly explained by the statement regarding the tins of 

 Sepiola, as to which he says : " uec figura nee situ pinnis Sepiarum et 

 Loliginum similis, neque enim angusta longaque totam alvuui ambit, ut in 

 Sepiis, neque lata et in acutum angulum terminatur, ut in Loliginibus, sed 

 rotunda, parva, utrinque veluti adnata modicam alvi partem occupat, neque 

 ad extremura usque corporis protensa" (p. 250). AH this is indicative of 

 Ommatostrephes, to which the words "corpore in acutum desinente" are 

 also more suitable than to Loligo, even when they are employed in oppo- 

 sition to the body of Sepia. 



To this, the largest species of our European seas, and also the species 

 upon which I first observed the remarkable metamorphosis of the arm in 

 the male, I have given the name of Loligo Forbesii, after Profes.<or Edward 

 Forbes. By this I have wished to keep in remembrance not oidy tliat this 

 species is represented in his excellent vAork above mentioned, but also the 

 services done by this extraordinarily endowed man to natural history in 

 general and to the knowledge of marme animals in particular. 



