TROPICAL PACIFIC HOLOTHURIOIDEA. 135 
Peniagone bispiculata,! sp. nov. 
Length about 45 mm.; width, back of middle, about 30 mm. Body oval, 
narrower in front, very flat in the preserved specimens but probably less so in 
life. Tentacles ten, relatively large. Oral surface with 10-12 very large pedi- 
cels surrounding it, beginning near mouth on each side; even in their con- 
tracted condition these pedicels are several millimeters long and 2 mm. thick 
at base. Dorsal crest thin, rather low, rounded, about 10 mm. wide by 5 mm. 
high, placed close to anterior end of body. On right side, 12 mm. back of 
crest, is a papilla 6 mm. long by 2 mm. thick, pressed down flat against body; 
no corresponding papilla can be detected on the left side but it may have been 
broken off, and as the whole body-surface is very much wrinkled and folded, 
its point of attachment is no longer to be found. Color, gray (holotype) or 
pinkish (paratypes). 
Caleareous particles not very distinctive except by size; they resemble 
those of P. intermedia but are more slender and have more pointed tips to the 
four inwardly curved arms; these arms are 100-120 u long; here and there among 
these small and very numerous spicules are scattered abruptly larger ones with 
arms 150-170 u long. 
Station 17. Eastern Tropical Pacific, 0° 50’ N., 137° 54’ W., 2,463 fms. Bott. temp.? Lt. yel.-gy. 
glob. oz. 
Three specimens. 
While this new Peniagone resembles vitrea and intermedia in certain par- 
ticulars, the arrangement of the large pedicels and the form of the body are very 
different from what is found in either of those species. The size of the spicules 
and particularly the existence of two very different sizes are also distinctive 
points. It is at least worthy of note that while the holotype is fairly well pre- 
served the paratypes are in very bad condition, each of them being split open 
down the back for the entire length. The appearance suggests that with the 
release from the bottom-pressure these specimens exploded leaving only the 
empty skin, which had proved weakest along the middorsal line. 
Peniagone intermedia. 
Lupwia, 1893. Bull. M. C. Z., 24, p. 109. 
The specimens referred to this species are in such poor condition, that 
their identification is far from certain. They are supposed to belong to inter- 
1 bispiculata = having two kinds of spicules, in reference to the two distinct sizes in the calcareous 
particles. 
