82 BENTHOPECTINIDAE. 
ASTROPECTINIDAE. 
Dytaster demonstrans. 
Lupwie, 1905. Mem. M. C. Z., 32, p. 41. 
There is a good series of this species, both young (R = 10-25 mm.) and 
adults (R up to 110 mm.) but Ludwig’s very full account, with its numerous 
figures, leaves no occasion for extended notice. While I agree with Fisher that 
demonstrans is probably identical with gzlberti, I have not seen specimens of the 
latter and therefore leave the point for future settlement. The following sta- 
tions extend the range of demonstrans some 500 miles southward, and bathy- 
metrically 150 fms. 
Station 4647. Eastern Tropical Pacific, 4° 33’ S., 87° 42’ 30” W., 2,005 fms. Bott. temp.35.5°. Lt. gy. 
and br. glob. oz. 
Station 4649. Eastern Tropical Pacific, 5° 17’S., 85° 19’ 30” W., 2,235fms. Bott. temp. 35.4°. Fne. 
stky. gy. m. 
Station 4656. Eastern Tropical Pacific, 6° 54’ 36’ S., 83° 34’ 18” W., 2,222 fms. Bott. temp. 35.2°. 
Fne. gn. m., mang. nod. 
Station 4658. Eastern Tropical Pacific, 8° 30’ S., 85° 35’ 36” W., 2,370 fms. Bott. temp. 35.3°. Fne. 
gn. m., mang. nod. 
Eighteen specimens. 
BENTHOPECTINIDAE. 
Pectinaster agassizii. 
Cheiraster agassizii Lupwic, 1905. Mem. M. C. Z., 32, p. 1. 
Pectinaster agassizii Lupwie, 1910. Sitz. K. Preuss. Akad. Wiss., 23, p. 449. 
These specimens are in rather poor condition and none have the arms 
unbroken but R ranges from about 40 to 80 mm. Some specimens have a few 
small pedicellariae on the abactinal surface close to the superomarginal plates 
at the base of the rays but there are no intermarginal pedicellariae. These 
specimens, while still agassizii, show some approach to Fisher’s subspecies P. a. 
evoplus from farther north. The exact locality where they were taken is not 
certain, but it was probably at 
Station 4631. Panama: off Mariato Point, 72 miles, 774 fms. Bott. temp. 38°. Gn. s. 
Eleven specimens. 
GONIASTERIDAE. 
Pseudarchaster pectinifer. 
Lupwie, 1905. Mem. M. C. Z., 32, p. 106. 
These specimens, with R = 60 and 80 mm. respectively, are somewhat 
intermediate between that originally described by Ludwig and the one discussed 
