176 Bulletin, Vanderbilt Marine Museum, Vol. IV 



Color : See Jatta, 1896, color plate 2, figure 5. The body, fins and 

 head are a delicate jade-green with rosy tints in the median region 

 of head and body ; the arms are rosy, tinged externally with delicate 

 blue along the border of the suckers. 



Technical description: Jatta gives an excellent description of 

 this species, based on an extensive series of specimens, with many 

 careful figures. (Printed in Italian.) 



This species is said to attain a length of five inches. The body is 

 short, three-fourths as wide as long, broadly rounded posteriorly; 

 anteriorly the margin is produced to a somewhat prominent rounded 

 median dorsal point; the fins are placed anteriorly and are thin, 

 nearly semicircular, a little larger anteriorly. The head is short, 

 nearly as wide as long, flattish dorsally, the optical region swollen. 

 The eye is of moderate size, jewel-like in its beauty. The arms are 

 awl-shaped, somewhat compressed, of unequal length, decreasing in 

 the order 3, 2, 4, 1, the cups are nearly spherical, arranged in two 

 rows proximally, in four towards the tips. The horny rings or the 

 suckers are smooth. The tentacular arms are very slender, the clubs 

 of moderate width; the cups are larger proximally, diminishing in 

 size and increasing in number towards the tip. The shell is about 

 two-thirds as long as the body, lanceolate. 



References : Sepiola macrosoma Delle Chiaje, vol. I, p. 11, tav. 71, 



figs. 1-11, 1829. 

 Rossia macrosoma D'Orbigny and Ferussac, Cephal. Acet., p. 245, 



pi. IV, figs. 13-24, 1839.— Jatta, Fauna und Flora, des Golfes 



von Neapel, Mon. 23, p. 124, tav. 4, figs. 5 e 6 (color plate) ; 



tav. 5, fig. 3 ; tav. 7, figs. 7 e 15 ; tav. 8, fig. 2 ; tav. 14, figs. 16-30 ; 



1895 (full description and synonymy). — Naef, ibid, Mon. 35, 



p. 590, text figs. 338-340, 1923 (Morphology).— Joubin, L., Mem. 



Soc. Zool. France, p. 118, fig. 21, 1902. 



Subgenus: Semirossia Steenstrup. 



Rossia tenera (Verrill). 



Plate 110. 



Type : Founded on about 200 specimens taken by the United States 

 Bureau of Fisheries Steamer "Fish Hawk" at stations 865 to 880. 

 The depository is not cited, but probably is the United States National 

 Museum. 



