608 LÖNNBERG, NOTES ON SOME RARE CBPHALOPODS. 



tentacle-like projection about 2| mm. in length. The sensory 

 epithelium forms an opaque cap at the tip of a transparent stem 

 in the centre of which the strong nerve can be seen. The shape 

 of the organ thus resemhles those of Chiroteuthis *) Dorat- 

 opsis ^) and Mastig otlieuthis agassizii ^) and in this shape the 

 olfactory organ seems easier to honiologize with the Gasteropod 

 tentacle as is done by Lankester. ^) 



The shape of the olfactory organ and the presence of renal 

 papillae seems to unite Mastigoteuthis with Chiroteutlndce, but it 

 is separated from the same by the presence of a pair of dorsal 

 bridles, the six-angled buccal membrane, the shape of the con- 

 nective apparatus etc. 



Channoteuthis mollis Appellöf. 



A very beautiful speciraen of this species, which has recently 

 been described by Appellöf, was caught by Capt. Eckman in 

 the Atlantic between lat. 32°— 31' N., long. 26'— 28° W. It 

 was exceedingly interesting to find this peculiar CEgopsid again 

 and to obtain such a fine specimen. It is a female, as is also 

 Appellöf's specimen from the Mediterranean, and it agrees in 

 every respect with his excellent déscription. *) It has the sperma- 

 tophores fixed in a row along a split in the skin on the ventral 

 face of the pallium. Although our specimen only has one such 

 row (to the left) and Appellöf's has two it is evident that this 

 mode of attaching the spermatophores is characteristic for the 

 genus Chaunoteuthis, and it is thus a very remarkable and im- 

 portant biological feature which separates Chaunoteuthis from 

 Onycliii and Ommatostrephini in which the spermatophores are 

 fixed in the pallial cavity. It was also interesting to ascertain 

 the existence of this form in the Atlantic, where it probably 

 has a wide distribution, although hitherto seldom found. 



1) Conf. Weiss 1. c. Pl. VIII, fig. 4, Pl. IX, fig. 9. 



-) Conf. Verrill I. c. Pl. XLIX, fig. 3 a. 



3) Conf. Weiss 1. c. p. 78. 



*) From this can be deduced that Chaunoteuthis really represents a well defined 



genus among the Cephalopods and not is established merely on a mutilated 



specimen. 



