MUSEUM OF COMPARATIVE ZOOLOGY. 191 



iiig the young Echini dredged by Mr. Pourtal^s in 1867- G8, I figured as the 

 young of Echinolampas dep-essa a number of small Echini, which I am now 

 convinced are the young of Conoclypus and not of Echinolampas. After my 

 departure Captain Sigsbee dredged off Havana a few young as well as small 

 specimens identical with those dredged by Mr. Pourtales. These young speci- 

 mens had the same yellow color of the old Conodijpus, as well as all the char- 

 actera 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 Spatanrjoids and Ulijpeastroids). Some of the young figured by me in 

 PI. XVI , Rev. Echini, are the young of Echinolampas, while others are the 

 young of Conoclypus. Figs. 17, 18, 19, 21, PI. 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° 21' W. 242-450 fms. 

 " Off Havana. 175 fms. 



Neolampas rostellata A. Ao. 

 Station No. 5. Lat. 24° 15' N., Long. 82° 13' W. 229 fms. 



Homolampas fragilis A. Ag. 



Fragments of a large specimen of Homolampas, very probably the adult of 

 II. fragilis A. Ag., of which young specimens were dredged by Mr. Pourtales 

 [A. Ag., Rev. Echini, PL XVII. Figs. 13-21]. These fragments sh.ow that 

 H. fragilis is closely allied to a large species of Homolampas [H. fulva A. Ag.], 

 to be described and figured in PI. XXIV. of the memoir on the Echini of the 

 Challenger E.xpedition. It differs first in the closer tuberculation of tlie mili- 

 aries, the larger number of primary tubercles in the interambiilacral 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. Ao. 

 (Sigsbee.) Off Havana. 242 fms. Fragments. 



Eupatagus longispinus A. Ac. spec. nov. 



Fragments of a Spatangoid allied to Eupatagus, Macropneustes, Platybrissus, 

 and Paleopneusles, unfortunately too imperfect for generic determination. The 

 petals are flush with test, closed somewhat, as in Eujiatagus and Platybrissus. 



