ECHINOCYAMUS PLATYTATUS. G3 



well with his description and figures. The depth at which this species lives is 

 worthy of remark. The Albatross specimens were taken at the following 

 places : — 



Station 3839. Off Lae-o Ka Laau Light, Molokai, Hawaiian Islands. 

 Bott. temp. 46.3°. 259-266 fms. Lt. br. m., s. 



Station 3908. Off Diamond Head, Oahu, H. I. Bott. temp. 43.8°. 304- 

 308 fms. Fne. wh. s., m. 



Station 3914. Off Diamond Head, Oahu, H. I. Bott. temp. 46° (?). 289- 

 292 fms. G}^ s., m. 



Bathj-metrical range 259-308 fms. Extremes of temperature, 46.3°-43.8°. 



Five specimens, of which four are bare tests. 



Echinocyamus grandiporus. 



Mortensen, 1907. Ingolf Ech., pt. 2, p. 33. 



Dr. Mortensen's presentation of the claims of this species is quite convincing. 

 There are specimens in the M. C. Z. from numerous stations in the West Indian 

 region, extending from the Florida Keys, western Cuba, and Yucatan Bank, 

 through the Leeward Islands and southward to Bahia, Brazil. The bathymetri- 

 cal range is from 79 to 805 fms. There are no specimens of any other fibulariid 

 from the West Indian region in the M. C. Z. collection. 



Echinocyamus platytatus/ sp. nov. 

 Plate 127, figs. 1-6. 



Length 6 mm.; breadth, 5.5 mm.; height 1.4 mm., mouth about 1 mm., and 

 periproct .6 mm., across. Test very low, broad and flat, not concave orally. 

 Petals imperfect and indistinct with only two or three pairs of pores on each 

 side. Periproct about twice as far from mouth as from margin. Sexes easily 

 distinguishable, as the genital pores of the female (PI. 127, fig. 6) are very much 

 larger than those of the male (PI. 127, fig. 5). Even in the male the genital 

 pores are larger than the ocular pores. Radiating partitions in test not well de- 

 veloped (PI. 127, fig. 3), extending scarcely half way from margin to mouth. 

 Auricles low and wide. Ambulacra hardly twice as wide as interambulacra, 

 at ambitus. Primary tubercles relatively large, but not so large as female 



' wXariiTaTos = most flat. 



