A. M Verr ill —Moll usca of the New Eyigland Coast. 235 



Addenda. 



After the preceding pages were mostly in type, an additional lot 

 of mollusea, dredged in 1883, by the Albatross, mostly from oft' Cape 

 Hatteras, was received from the National Museum. It contained 

 many additions to the list. A few of the most important ones are 

 here included. 



Octopus Carolinensis Veniii, sp. nov. 



Body, in the alcoholic specimen, rather small, somewhat oblong, 

 obtusely rounded posteriorly and slightly emarginate beneath. Head 

 large, and with the basal web larger than the body. Eyes large and 

 prominent, occupying nearly the whole of the sides of the head, and 

 in contact, or nearly so, dorsally. Entire surface of the body, head 

 and upper surface of the umbrella and arms covered with minute but 

 prominent verructe, which are somewhat larger and more crowded on 

 the back than beneath. There are no cirri on the back nor above the 

 eyes, but the upper eyelid is covered with small verrucse like those of 

 the back, and is marked with radiating wrinkles. Siphon moderately 

 long and rather slender. Arms angular, long, slender ; the two lat- 

 eral pairs about equal in length ; the ventral and dorsal pairs about 

 equal in length and slightly shorter than the lateral ; the ventral 

 arms are a trifle longer than the dorsal and appear to have the 

 suckers a little larger. The web is more than one-fourth the length 

 of the dorsal arms, and extends farther out between the lateral arms 

 than between the ventral or dorsal. A rather wide marginal mem- 

 brane runs along the arms, even to the tips; it is most developed on 

 the lower side of the lateral arms. The suckers are moderately 

 large, rather closely arranged in two regular rows, and diminish very 

 regularly from near the base to the very slender tips of the arms. 



Length of body, 22"^'"; its breadth, 20™""; breadth of the head, 

 the same ; length from the posterior end of the body to edge of 

 web between dorsal arms, 45™°^ ; length of dorsal arms from mouth, 

 g4mm. of 2d pair, 72'"'"; of 3d pair, 70'"'^^ ; of 4th pair, 66™'°; diameter 

 of dorsal and lateral arms, d'o"^"" ; diameter of largest suckers, 2'"'". 



Color, in alcohol, rather dark purplish brown above, due to abund- 

 ant, closely crowded, minute chromatophores ; lower surface, yellowish 

 white, rather thickly specked with orange and brown chromatophores. 

 Inner surface of arras, suckers and eyelids white. 



Station 2109, oft' Cape Hatteras, in 142 fathoms (No. 35,673). 

 One female. 



Trans. CoNx\. Acad., Vol. VI. 30 July, 1884. 



