408 A. E. Verrill — 3farine JSfemerteans of N'ev England, etc. 



dark brown pigment specks runs between the ocelli on each side. 

 In one example the median region, posteriorly, Avas green probably 

 from the contents of the intestine showing through the integument. 



Gloucester, Mass., at Ten Pound Island, in a tide-pool at low- 

 water, among algse. 



This European species is common among hydroids, bryozoa, ascid- 

 ians, etc., between tides, on rocks, piles of wharves, and in tide- 

 pools, from Long Island Sound to the Bay of Fundy. I have, also, 

 often dredged it in 2 to 12 fathoms, at various localities on hard 

 bottoms. It is especially abundant among ascidians in Vineyard 

 Sound, in 6 to 10 fathoms. Very common at Noank, Conn., in the 

 harbor, on muddy bottoms among eel-grass. Common in similar 

 places and on piles of wharves, at Wood's PIoll, Mass., and Newport, 

 R. I. 



Tetrastemma vermiculus, variety catenulatum uov. 

 Plate xxxiv, figure 12; plate x.vxv, figure 11. 

 Form and size essentially as above described. Ground-color, 

 at>ove, light salmon, pale yellow, or yellowish gray, thickly covered 

 along the sides with irregular specks, spots, or blotches of brown, 

 which at moi-e or less irregular intervals extend upward toward or 

 across the middle line, interrupting the median dorsal light stripe, 

 which is often thus divided into a series of irregular oblong or 

 elliptical spots; sometimes there is also a row of small brown spots 

 along the median line; middle of head pale, often with flake- white 

 specks; stripe of dark color, more or less distinct, between the two 

 eyes of each side ; lower surface pale yellow or yellowish white. 

 Length up to 18"""; diameter 1""". Described from life. Specimens 

 of this marked variety are common in the harbor at Wood's Holl, 

 Mass. 



Other specimens, from the same locality, were noted as follows: 

 Body very changeable, often, in extension, narrow or sub-acute at 

 both ends and more or less swollen in the middle, at one or more 

 places, at other times nearly cylindrical or terete. Color pale 

 vellowish or grayish green, with a darker central line on the pale 

 dorsal stripe and with irregular, transverse, lateral markings. Or 

 specks of darker brown are scattered over the back, and are often 

 arranged in imperfect lateral stripes, leaving a paler, wide, more or 

 less irregular and interrupted median stripe; lower surface pale. 

 Ocelli reddish brown, forming nearly a square. Usually a line of 

 dark pigment connects the two ocelli of the same side (No. 857). 



