530 A. E. Terrill — Catalogue of Jfarine Mollusca. 
RHIPHIDOG-LOSSA. 
Calliostoma Bail'dii Terrill and Smith * 
Calliostoma Rjirdii Terrill and Smith, in Terrill, Amer. Journ. Sci., xx. pp. 391, 396, 
Nov.. 1880 : Proc. U. S. Nat. Mus., iii. p. 378. 1880. 
DalL Bulletin Mus. Comp. Zool.. ix. p. 45, 1 880. 
Plate LTII, figure 26. 
The animal has long, slender, acute tentacles, yellowish white with 
a dark central line. Lateral cirri four on each side, two of them an- 
terior and two posterior, similar to the tentacles in color and form, 
but only about one-half as long, and more slender; a lateral crest- 
like ridge, with a denticulated margin, connects the cirri together on 
each side, aud runs back on the posterior part of the foot, as a carina ; 
between these there is a shallow groove. Eyes large, black. Foot 
loug, acute posteriorly ; in front the angles are obtuse. Color-of foot 
and head white or yellowish, with streaks of dark brown. 
South of Martha’s Vineyard, at rnauy localities, both in 1880 and 
1881. Stations 865 to 874, in 65 to 192 fathoms, 1880, many living 
specimens; most common at stations 869 and 871, in 192 and 115 
fathoms. Stations 921-923, 941, 944, 949, 950, 1036, 1038, 1040, in 
65 to 146 fathoms, 1881. Off Chesapeake Bay, station 896, 56 fath- 
oms. Off Delaware Bay, station 1047, in 156 fathoms. Gulf of 
Mexico aud off Florida, “ Blake” expedition (t. Dali). 
Margarita regalis Terrill and Smith. 
Margarita regalis Terrill and Smith. Amer. Journ. Sci.. xx, pp. 392, 397, Nov., 1880 ; 
Terrill Proc. U. S. Nat. Mus.. iii. p. 378. 1880. 
Plate LTII, figure 37. 
Stations 870, 871, 880, 881, 891 to 895, from 115 to 500 fathoms, 
1881. Most abundant at stations 891 to 894, 365 to 487 fathoms. 
Stations 925, 938, 939, 946, 947, 994, 997 to 999, 1028-29, 1032. in 
224 to 458 fathoms, 1881. Off Chesapeake Bay, station 898, 300 
fathoms. Off Delaware Bay, station 1049, 435 fathoms. 
Margarita lamellosa Terrill and Smith 
Margarita lamellosa Terrill and Smith. Amer. Journ. Sci., xx. pp. 391 , 397. Nov.. 1880 : 
Proc. U. S. Nat. Mus.. iii p. 378. 1880. 
? Margarita ceglees 'T atson. Journ. Linn. Soc., xiv. p. 704. 1879. 
DalL Bulletin Mus. Comp. ZooL, ix. p. 40, 1880 [cegleis]. 
Plate LTIL figure 38. 
Mr. Dali thinks that this species is only a variety of M. ceglees W. 
* For those authors who do not adopt Calliostoma, this species will be Trochus 
Bairdii or Ziziphintis Bairdii. 
