A. E. Verrill on Ascidiam from New England. 



Eastport Harbor, 12 to 20 fathoms,— Expedition of 1870. 



The eloacal ducts of a specimen taken in August, were fou 



!i!led with chains of eggs containing the tadpole-sha; 



■^ in an advanced stage of development Xo (■<:<:> 



- were observed in the atrium of the numerous zoi. 



Lissoclinum, tenerum^ sp. nov, 

 lies encrusting shells, ascidians, etc., forming thin, soft, 

 Mis crusts, which are translucent, and filled with nume- 

 i.v small zooids, which are nearly uniformly distributed. 

 'Openings small, round, numerously scattered over the 

 Zooids have the branchial region more elongated and 

 1' than in the preceding species, with a somewhat larger 

 : ■ between it and the abdomen, and with the latter, ex- 

 '■ "f the distended ovaries, smaller than the branchial re- 

 J-'i'>ii. Stomach elongated, longitudinally ribbed. Branchial 

 tube elongated, with six short papillae ; anal short, broad, late- 

 ral, below the middle of the branchial sac, slightly six-lobed. 



Color not observed in life ; in alcohol transparent whitish, 

 with yellowish white zooids. 



The colonies are up to two inches in diameter and 10 to -12 

 thick ; zooids about -07 long ; the thorax -032, by "02 wide ; 

 the abdomen '025 long, by -015 in diameter, exclusive of the 

 ^hstended ovaries, which in some cases are as large as the entire 



^wrt, Me., 10 to 40 fathoms, shelly bottom,— Exp. 1870; 

 - "f Newfoundland,— T. M. Coffin. 

 ' ;^ species may be easily distinguished from the preceding 

 ','> 3 lie very smallzooids and paler color. The zooids are very 

 «;i!icrent in form, owing to the lateral position of the anal on- 

 "^■f- The stomach is remarkably elongated and slender in 

 }ounrr individuals, projecting into a posterior prolongation of 

 tl'e abdomen. The eggs Jre few and relatively very large. 

 *^lanv of them appear to become detached by ruptunng the 

 membranes of the ovary, and escaping into the gelatmous com- 

 ^»on tissue, develop there. 



. ihe development of such eggs* is direct, without passing 

 ^'oiujh a tadpole-shaped larval state. Scattered through the 

 common gelatinous mass, young ones may be found m aU 



J^ith the alcholic specimens it is not possible to trace Z"^^^^^%ll\Z'^l 

 ^8 of this development, or to b« nerfectlr certain that these eg-hke bod,e« 



