Nr. 5] THE CEPHALOPODA DIBRAN CHIATA 9 



of body to ventral edge of mantle 4 mm. Fig. 3 shows an arm of 

 an embryo. At the base of the arm the suckers are arranged in a 

 double file, and higher up in 3—4 files. In de description of M. 

 macrosoma Forbes and Hanley(1853, vol. 4, p. 222) write: «The 

 suckers are small, oblique, white, and pedunculate; they are ranked 

 in double file on the lower part of the under surfaces of the arms 

 and in four regularly and irregularly throughout the remainder». 



The Sepia-eggs have some likeness with a duster of grapes and 

 are called by Italian fishermen «uva marina». A. Steuer (1910, 

 p. 24) has drawn such a duster, viz. eggs of Sepia filliouxi Lafont 

 and writes: «Die Sepien (Sepia filliouxi) kommen im Friihjahr in 

 grossen Massen in die Seegraswiesen, um ihre kohlschwarzen Eier 

 an die Zostera- und Algenbiisohe abzulegen». 



The eggs of R. macrosoma (fig. 1) is a northern pendant to the 

 «uva marina» of the Italian coasts. 



Eggs of R. macrosoma I have moreover seen from the following 

 localities in the Trondhjem Fjord. ^7^ 1923. Vikaleiret,, Frosta, 

 57 m. Eggs light blue, diameter ca. 10 mm. No macroscopic em- 

 bryos. "V? 1916. Ilsviken at Trondhjem, ca. 50 m. Eggs of the same 

 size and colour as the eggs from Stjornfjord. No macroscopic em- 

 bryos. ^72 1916. At Sundnes in the inner part of the Trondhjem 

 Fjord, ca. 50 m. To use the term of Lo Bianco (1899, p. 531): «Il 

 colore ceruleo palido». Size of the eggs 9 — 10 mm. The embryos 

 (fig. 4) at an earlier stage of development than the Stjornfjord spe- 

 cimens (fig. 2). 



Fig. 4. Embryo of R. macrosoma. Sundnes, 1-/2 1916. 

 X 10. C. Dons del. 



Both in fig. 2 and fig. 4 the body is tapering to a point as in spe- 

 des of Sepia, of which some have a rostral thorn. This point is 

 more distinct in fig. 4 than in fig. 2, and may be explaned as a 

 disappearing larval excrescence. It is probably an important onto- 



