22 ASCIDIID.E. 



Ociius GLANDULA, Stimpson. 1852. 



Body globular, always free, and thickly coated with sand, mud, 

 or other extraneous substances. Apertures on tubes, the bran- 

 chial with four lobes, the anal square. Branchial sac with few 

 distant plications. 



Glandula mollis. 



Plate XXII. Fig. 317. Plate XXIV. Figs. 328, 329. 

 Glandula mollis, Stimpson, Proc. Bost. Soc. iv. 230 (1852) ; Check Lists, 2. (1860). 



Body globular, but often considerably flattened, soft, and flex- 

 ible. Test very thin, transparent, and thickly covered with loose 

 sand. Diameter half an inch, usually less. 



Dredged abundantly on a sandy bottom in ten fathoms, off 

 Cheney's Head, Grand Maiiaii. {Stimpson.) 



The drawings by Mr. Burkhardt, copied on the plate, were re- 

 ceived without name. If they represent this species, they show 

 it to vary considerably in form. 



Glandula fibrosa. 



Plate XXIII. Fig. 323. 



Glandula fibrosa, Stimpson, Proc. Bost. Soc. N. H. iv. 230 (1852); Check Lists, 2 



(18G0). 

 Glandula (jlutinnns, Packard, Invert, of Liibr. in Mem. Bost. Soc. N. H. i. 277, no descr. 



(1867). 

 Cijnthia fjlutinans, JNIoller, Inch Moll. Gr. 21 (1842). 



Test thin, but very tough and leathery, covered with numerous 

 fibres resembling cotton, which serve as a framework or attach- 

 ment for the hard, thick coating of mud, in which this species is 

 always found incased. Thus a ball is formed of about one inch 

 in diameter, twice that of the body alone. The tubes extend only 

 to the surface of tlie ball. It is an exceedingly tough, hard spe- 

 cies, and when divested of its covering will bear the weight of 

 several pounds without bursting. 



Dredged in thirty-five fathoms on a muddy bottom, in the Ilake 

 Bay, off Grand Manan. {Stinipson.) 



The figure referred to above is dra^vn from a specimen preserved 

 in alcohol, received by Dr. Packard from Lutken, under the name 



