344 ECHINODERMATA. 
M. holothurioides, Cuv. The only species that I know in the 
Atlantic Ocean. The anal extremity terminates in a point. 
Minyas, Cuv. 
Where the body is also destitute of feet and open at both extremi- 
ties; but its form is that of a spheroid depressed at the poles, and 
furrowed like a melon. I can find no armature about the mouth. 
M. cyanea, Cuv., Régn., Anim., IV, pl. xv, f. 8(1). A beau- 
tiful species of a deep-blue colour that inhabits the Atlantic 
ocean(1). 
Priaruus, Lam. 
Where the body is cylindrical and transversely marked with deep 
annular rug, terminated anteriorly by an elliptical mass slightly 
wrinkled longitudinally, perforated by the mouth, and posteriorly 
by the anus, from which issues a thick bundle of filaments which 
may be organs of generation. The interior of the mouth is 
provided with a great number of extremely sharp and horny teeth 
arranged in quincunx, and directed backwards; the intestine pro- 
ceeds in a straight line from the mouth to the anus. The muscular 
system resembles that of the Holothuriz. 
P. vulgaris; Holothuria priapus, Mill., Zool. Dan., XCVI, 
1. Itis from two to three inches in length, inhabits northern 
seas, and is the only species known. 
LiTHODERMIS, Cuv. 
Where the body is oval and compressed posteriorly; its surface 
has the appearance of being covered with a layer of stony granules, 
which form an extremely indurated crust. The mouth is surrounded 
with tentacula, and the intestines seem to be analogous to those of 
the Holothuriz. ‘They have no anus that I can perceive. 
DL. cuneus, Cuv. Blackish, and two inches in length. From 
the seas of India, and the only species known. In 
(1) Taken to France by M. Péron. 
