CLARK: PUGET SOUND ECHINODERMS. 
333 
ing the specimens of Psolus ; and, also excepting that species, the 
number of individuals is unfortunately small. 
? Synapta albicans Sel. Plate 4, fig. 5. 
There are two very small specimens of a Synapta, which I 
assume were dredged in Kilisut Harbor (Scow Bay). At least, Mr. 
Harrington says that two synaptas were dredged in Kilisut Harbor, 
and, as these are the only synaptas in the collection, I assume 
that they are the two referred to. One is a fragment, 30 mm. long, 
without head or tail, while the other, though only 25 mm. long, 
seems to be a complete individual, and is apparently sexually mature. 
These specimens resemble small specimens of S. inhaerens in shape, 
number of tentacles and digits thereon, shape of calcareous ring, and 
in the general internal anatomy. The anchors and plates are indis¬ 
tinguishable from those of inhaerens . The miliary granules (Plate 
4, fig. 5), however, are like those of roseola, and are present only in 
the longitudinal muscles. There are no sense-organs of any kind 
on or near the tentacles. Verrucae are numerous, small and color¬ 
less. These specimens are pale flesh-color, and there are no pig¬ 
ment spots in the skin. S. albicans was described by Selenka from 
specimens collected at Mendocino, Cala. The only characters given 
in his description which would serve to distinguish the species from 
inhaerens were the number of digits on the tentacles (21 in his 
specimens) and the absence of a loop in the intestine. He gives 
no clue to the size of the animal. The specimens before me differ 
from Selenka’s in both these particulars, for there seem to be only 
9 digits on the tentacles, and I could not s6e that the intestine 
differed at all in arrangement from that of inhaerens. It seems to 
me more than possible that the specimens from Puget Sound are 
young individuals of Selenka’s species. We know that in some 
synaptas the number of digits on the tentacles increases with age, 
and that fact may account for the discrepancy between the Mendo¬ 
cino and Kilisut specimens. If they belong to the same species, as 
I have assumed, it may be easily distinguished from inhaerens by 
the absence of the sense-cups on the tentacles, though Selenka does 
not refer to that fact. At any rate, it seems to me better to regard 
these two specimens as albicans than to base a new species on 
such slight differences, with so little material at hand. 
