BOLTENIA. 15 



a kidney-shaped body, of a wriuklcd, leathery structure, al)out two 

 inches long and one in width, suddenly narrowing at the top into 

 a small stalk not larger than a crow-quill, and from six to twelve 

 inches in length. It has two cross-shaped orifices, nearly an inch 

 apart. It is attached by its stalk to stones in deep water, whence 

 it is occasionally hooked up liy the fishermen, or driven on shore 

 by storms. Its surface is usually loaded with marine plants, zo- 

 ophytes, &c. (^Goulcl.} 



The figure referred to is drawn from a specimen preserved in 

 alcohol, collected by Dr. Packard. 



Dr. Stimpson remarks on the species: "This species is very dis- 

 tinct from the preceding (^B. rubrci), being uniformly of a fine 

 yellowish white color, with a smooth, velvety surface. It inhabits 

 rocks in deep water, never occurring in less than fourteen fath- 

 oms. I am far from certain that it can be referred to B. reni- 

 formis^ but approaches that species more than any of the others 

 mentioned by MacLeay in his memoir." 



Boltenia rubra. 



Plate XXIV. Fig. 337. 



Boltenia rubra, Stimpson, Proc. Bost. Soc. Nat. Hist. iv. 232 (1852) ; Grand Manan, 20 



(1854) ; Check Lists, 1. 



Body arcuated, slightly compressed laterally, and tapering rather 

 abruptly to the stem, which is slender, very hard, and granulated. 

 Test very rugose, especially on the dorsal surface, and of a deep 

 red color. Anal aperture nearly sessile; branchial on a short 

 tul)e which curves toward the stem. Total leng-th, one foot ; length 

 of the body, one and three fourths inches ; breadth, seven eighths 

 of an inch. 



This species lives attached to rocks in from two to fourteen fath- 

 oms. I have found it in Massachusetts Bay, from Boston to Cape 

 Ann ; and also at Grand Manan, at the mouth of the Bay of Fuiidy. 

 (^Stimpson.^ 



The above description is copied from Dr. Stimpson. To the 

 species I doul^tfully refer the figure drawn from nature by Mr. 

 Burkhardt, which I received without name from Professor Agassiz, 

 It will be observed that the figure hardly agrees with several 

 points of Dr. Stimpson's description. The body is larger in pro- 

 portion to the length of the stalk ; the extremity of the latter is 

 also bifid. It may be that Boltenia reniformis of De Kay belongs 

 to this species rather than to B. clavata. 



