ANNOTATED LIST. 91 
up between inferomarginals. Distal inferomarginal plates with a conspicuous but low 
central tubercle, 0.5 mm. in diameter. Probably 2 series of actinolateral plates on basal 
half of ray, and possibly a few plates of a third outer row; these details are not important 
and could be determined only by greater injury to the specimen than the matter warrants. 
Adambulacral armature as usual, of 2 furrow and one subambulacral spines to each plate. 
Furrow spines about 0.75 to 0.80 mm. long, slightly prismatic (especially the adoral) but 
with flattened inner surface, on which is a small but rather conspicuous concavity; adoral 
spine more or less markedly the larger, its tip in particular being noticeably more widened. 
There are no granules on inner side of the furrow spines. Subambulacral spines short, 
stout, and thick, almost spherical or hemispherical, about 0.5 mm. in diameter; separated 
from furrow spines by only a single series of rather coarse granules. Oral plates small but 
conspicuous because of the unusually coarse granules with which they are densely covered 
and the apparent absence of any suboral spine. Color in life unknown; dry specimen 
dusky gray, lighter beneath; there are faint indications of dark blotches or indefinite 
bands on rays. 
Holotype: M. C. Z. No. 761. Zanzibar. Collected by Edward Ropes, in 1861. 
This species is so well marked that it is strange it has not been previously described. 
It is quite possible that the Tamarias listed by Bell from Zanzibar in 1903 as Ophidiaster 
fuscus represent this species, but until those specimens are reéxamined the matter must 
remain in doubt. Simpson’s and Rudmose-Brown’s (1910, pp. 58, 59) figures 1, 2, and 4 
of the sea-star they call Linckia marmorata are almost certainly made from a specimen of 
lithosora. The only difficulty is that they represent the ray without a distinct terminal 
plate. This is probably a mistake, however, as very few Ophidiasters or Tamarias have 
the terminal plate concealed. A further discussion of their remarkable description and 
figures will be given under 7’. marmorata. There is no reason to confuse lithosora and 
fusca, since the character of the skin and granulation is quite unlike in the two forms. 
The total absence of pedicellarice in lithosora is probably also a constant difference. 
Tamaria tenella. 
Ophidiaster tenellus Fisher. 1906. Bull. U. S. Fish Comm. for 1903, p. 1082, pl. xxxi, figs. 5, 5a. 
The unique holotype of this species was taken in 1902 by the Albatross in Pailolo 
Channel, Hawaiian Islands, in 130 to 151 fathoms. It seems to be a very well-marked form. 
Tamaria floride. 
ae ra Perrier. 1881. Bull. M. C. Z., 9, p. 9.—1883. Nouv. Arch. Mus. Hist. Nat. (2), 6, p. 221, 
pl. iv, fig. 1. 
This remarkable sea-star, so different in general appearance from Tamaria fusca, 
might not improperly be made the type of a new genus, especially as it is the only Tamaria 
occurring outside the Indo-Pacific region. But in view of the fact that only one other 
specimen is known besides the holotype, it would seem better to wait for more material. 
Owing to typographical errors, carelessness, or both, a number of misstatements have 
been published about the holotype, which is M. C. Z. No. 757. In the original description 
the width of the ray 5 mm. from the tip is given as 415 mm., presumably 4.75 mm. is meant. 
The number of pores in each area is given as “‘deux A quatre” but not rarely there are 
5 or 6 and occasionally 7. There is no hint as to the origin of the specimen. In the final 
report (1883) the dimensions are misprinted: R=33 mm., 5; r=8 mm.; R=3.7r. The 
8 is obviously an error for 9 but the significance of the 5 is puzzling. It may be purely a 
typographical error but I think it means that there are 5 rays, even though ‘‘Cing bras” 
is the first statement in the line above. The specimen is said to be from “123 pieds de 
profondeur dans le détroit de Floride. Communiqué par M. Alex. Agassiz avant les dra- 
gages du Blake.” Examination of Pourtales’s reports and Mr. Agassiz’s list of star-fishes 
