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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXII. 



shorter i-idg-es radiate from the center toward the peripher}^ There 

 are five primaries, three or four secondaries, and thirteen or fourteen 

 tertiaries. The primaries are longest and nearest the center, the sec- 

 ondaries shorter and toward the periphery, the tertiaries shortest and 

 at the periphery. Suckers are apparent!}^ al)sent. 

 Type—C2it. No. 5778, U.S.N.M. 



MYZOSTOMA EVERMANNI, new species. 



One specimen, M nnn. in diameter, from Crinoid Cat. No. 21708, 

 U.S.N.M., from Station 2166, off Habana, 196 fathoms, May 1, 1884. 



Flat and nearl}" circular in outline. 

 There are about eig'hty cirri around 

 the edge of the animal. These cirri 

 are of two sizes, alternating in po- 

 sition, the longer ones are a little 

 less than one-tenth of the diameter 

 of the M3'zostome. The parapodia 

 are prominent and are situated about 

 midway between the center and the 

 periphery of the ventral side. The 

 penes are long and slender. Suckers 

 Avith distinct mouths are situated 

 about midwa}' between the bases of 

 the parapodia and the periphery. The border outside of the suckers 

 is translucent, whereas inside of the suckers the ])ody is opaque and 

 light brown in color. The dorsal side is smooth. 



This species seems most nearly related to 31. eJegaiu Graff, which is 

 found in the Philippines. 



Type— Cat. No. 5779, U.S.N.M. 



Fig. 2. — Myzostoma evermanni. 



VIEW. 



MYZOSTOMA CERRIFEROIDUM, new species. 



Thirty-one specimens, 0.8 to 2.5 mm. in diameter, from Crinoid Cat. 

 Nos. 21707, 21709, and 21705, U.S.N.M., from Station 2753, St. Lucia, 

 281 fathoms, December 4, 1887, and Crinoid Cat. No. 21704, U.S.N.M., 

 Station 2752, St. Lucia, 281 fathoms, December 4, 1887, and Crinoid 

 Cat. No. 16895, U.S.N.M., from Station 2146, near Aspinwall, 34 

 fathoms, April 2,. 1884. 



This .species is similar to M. eeirlferuin, but is thicker and usually 

 has the lateral margins turned ventrally. 



It is nearl}' circular in outline, brown, and has ten pairs of short 

 cirri. The parapodia are prohiinent and situated a little nearer the 

 margin than the center of the ventral side. No suckers are visible. 



Typ<' and eotypes — No. 5780, U.S.N.M. 



