18«5.] PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 615 



the ainbulacral areas being of a dark, dull greenish color. Denuded 

 specimens were purplish gray on the upj)er surface, and on the lower 

 surface grayish in the interatiibulacral areas, and dull greenish in the 

 ambulacral. Many specimens of this species were stored in the same 

 tank with C. EavenelUi, and became strongly tinged with yellow, giving 

 them at first sight the general appearance of the latter species. 



In C RaveneUii where the test has been injured by accident, the in- 

 jured portion is frequently of a bright green color. The same color in 

 several specimens from station 2417 surrounds small shallow circular 

 cavities which appear to have been produced by some boring animal, 

 perhaps a species of Stylifer, but no such forms were found attached. 



Clypeaster subdepressus Agassiz. 



Station 2317, 45 fathoms (10676)5 station 2362, 25 fathoms (10625), 

 dead fragment; station 2375, 30 fathoms (8995), a large series, mostly 

 of small size, the largest measuring 90 millimeters in longitudinal 

 diameter: station 2388, 35 fathoms (8992); station 2411, 27 fathoms 

 (8994) ; station 2414, 26 fathoms (8993). 



A few notes regarding this species are given under Chfpeaster Raven- 

 eUii. One specimen from station 2375 had six ambulacral petals and 

 furrows. 



Encope Michelini Agassiz. 



Station 2375, 30 fathoms (8954) ; a very fine series, ranging in size from 

 small to large, the largest measuring about 100 millimeters in both longi- 

 tudinal and transverse diameters. The three anterior luuules in no 

 case form more than slight indentations of the edge of the test. The 

 interambulacral lunule is comparatively small, and th,e posterior ambula 

 cral lunules are of about the same size, though never closed. The 

 apex is frequently very prominent, that portion of the test bulging 

 greatly. From station 2410, 28 fathoms (8955), a similar but smaller 

 series was obtained. Fragments of dead specimens were dredged at 

 station 2360, 26 fathoms (10621), and station 2362, 25 fathoms (10622). 



Conolampas Sigsbei A. Agassiz. 



Station 2350, 213 fathoms, three living specimens of medium size 

 (10645), and one small dead specimen (10766) ; station 2342, 201 fathoms 

 (10762), one very young living specimen. 



Palceotropus Josephinae Loveu. 



Station 2327,182 fathoms (10635), one specimen; station 2341,143 

 fathoms (10634), 2 specimens. 



Paleopneustes cristatus A. Agassiz. 



Station 2332, 156 fathoms (10759), one small specimen ; station 2336, 

 157 fathoms (10761), one fragment. 



Paleopneustes hystrix A. Agassiz. 



Station 2343, 279 fathoms (10648), one specimen, measuring 63 milli- 

 meters in longitudinal diameter. The spines are proportionally fewer 



