REPORT ON THE ECHINOIDEA MORTENSEIST 293 



239 meters; coral; November 27, 1909 (1 specimen, Cat. No. E. 1331, 

 U.S.N.M.). 



Notes. — The specimen from station 5617 is notable for the fine 

 pinkish color of the median stripe on the secondary spines, which 

 gives the whole specimen a general pinkish hue; the apical system 

 is not conspicuously darker than the rest of the specimen. The 

 primary spines are very finely developed, white, with a pinkish base 

 and with the serrate ridges very distinct and with scattered small 

 wartlike elevations between the ridges; they are slightly swollen in 

 the basal part. The hairs covering the general surface of the spine 

 are very small and simple, as in the typical form. (See below, under 

 the var. cladothrix.) This specimen measures 34 mm. in horizontal 

 diameter; the longest primaries are 56 mm. in length, and 3. 5 mm. 

 thick at the base. 



The specimens from station 5367 are small, not exceeding 25 mm. 

 in horizontal diameter, with slender spines; they are inconspicuously 

 colored whitish yellow, with the apical system darker. 



STYLOCIDARIS REINI, var. CLADOTHRIX, new variety 



Plate 65, figs. 5-7; plate 66, fig. 1; plate 67, fig. 1; plate 75, fig. 4 



Localities. — Station 5212, east of Masbate; Panalangan Point bear- 

 ing S. 54° 30' E., 14.5 miles distant (lat. 12° 04' 15" N., long. 124° 

 04' 36" E.); 197 meters; bottom temperature 15.50° C; gray sand 

 and mud; April 20, 1908 (9 specimens, Cat. Nos. E. 1361, E. 1362, 

 E. 1367,U.S.N.M.). 



Station 5392, between Samar and Masbate, Tubig Point bearing 

 N. 49° E., 5 miles distant Gat. 12° 12' 35" N., long. 124° 02' 48" E.) ; 

 247 meters; green mud and sand; March 13, 1909 (5 specimens, Cat, 

 Nos. E. 1332, the type, E. 1333, U.S.N.M.). 



Station 5398, between Masbate and Leyte, Gigantangan Island 

 (S.) bearing S. 45° E., 2.7 miles distant (lat. 11° 35' 12" N., long. 

 124° 13' 48" E.); 208 meters; green mud; March 15, 1909 (1 speci- 

 men, Cat. No. E. 1378, U.S.N.M.). (See under var. rubida.) 



Characters. — These specimens, which are all in a poor state of pres- 

 ervation, differ from the typical form in the shape of the hairs cover- 

 ing the surface of the spines. While in the typical form these are 

 very small and simple, they are in the present form much larger, 

 rather coarse, and bush-shaped (figs. 20 a-b). 



These hairs are only distinguishable on clean, fully formed, and not 

 too old and worn spines. Generally the spines are so dirty (from the 

 contents of the trawl) or overgrown with foreign organisms that it is 

 necessary to clean them by treating them with sodium hypochlorite 

 and then rinsing them under a rather strong jet of water. In this way 

 it is easy to get them perfectly clean, with the hair covering preserved 

 in its full beauty, this word being not at all exaggeration. 



