MUSEUM OF COMPARATIVE ZOÜLOGY. 191 
ing the young Echini dredged by Mr. Pourtalés in 1867-68, I figured as the 
young of Echénolampas depressa a number of small Echini, which I am now 
convinced are the young of Conoclypus and not of Echinolumpas. After my 
departure Captain Sigsbee dredged off Havana a few young as well as small 
specimens identical with those dredged by Mr. Pourtalés, These young speci- 
mens had the same yellow color of the old Conoclypus, as well as all the char- 
acters of the adult, with the exception of the position of the anus, which was 
placed above the ambitus in the smallest specimen (as is the case in the majority 
of young Spatangotds and Clypeastroids). Some of the young figured by me in 
Pl. XVI, Rev. Echini, are the young of Echinolampas, while others are the 
young of Conoclypus. Figs. 17, 18, 19, 21, Pl, XVI., belong to Echinolampas, 
as well as Figs. 6, 7, while Figs. 1, 2, 3, 8, 9, 10, belong to Conoclypus, — the 
young of Echinolampas, for which the petaloid ambulacra (6, 7) were drawn, 
being somewhat more elongate and showing at an early age the rudiments 
of a petaloid structure, while in Conoclypus the petaloid structure, though 
present, is far less developed than in Echinolampas, being merely a widening 
formed by the double pores of that of the ambulacral area. 
Station No, 32. Lat. 23° 52! N., Long. 88° 05/ W. 95 fms. 
(Sigsbee.) Off Havana, Lat. 22° 11/ N., Long. 82? 9۱ W. 242-450 fms, 
& Off Havana. 175 fms. 
Neolampas rostellata A. Aa. 
Station No. 5. Lat. 24? 15' N., Long. 82? 13 W. 229 fms. 
Homolampas fragilis A. Aa. 
Fragments of a large specimen of Homolampas, very probably the adult of 
H. fragilis A. Ag., of which young specimens were dredged by Mr. Pourtalés 
[A. Ag, Rev. Echini, Pl. XVII. Figs. 13-21] These fragments show that 
H. fragilis is closely allied to a large species of Homolampas [H. fulva A. Ag.], 
to be described and figured in Pl. XXIV. of the memoir on the Echini of the 
Challenger Expedition. It differs first in the closer tuberculation of the mili- 
aries, the larger number of primary tubercles in the interambulacral areas near 
the abactinal system, and the coarser tuberculation of the odd anterior groove 
above the ambitus; also in the larger number of primary plates. No part of 
the anal system or of the actinal system was found among the fragments. 
Station No. 31, Lat. 24° 33/ N., Long. 84° 23/ W., 1920 fathoms, 
Pourtalesia miranda A. Ac. 
(Sigsbee.) Off Havana, 242 fms. Fragments, 
Eupatagus longispinus A. Aa. spec. nov. 
Fragments of a Spatangoid alied to Zupatagus, Macropneustes, Platybrissus, 
and Palcopneustes, unfortunately too imperfect for generic determination. The 
petals are flush with test, closed somewhat, as in Hupatagus and Platybrissus. 
