ECHINODERMATA— CLARK. 557 



TRIPNEUSTES GRATILLA. 



jEchinus gratilla, Linne, Sys. Nat., lOtli ed., 1758, p. 664. 

 Tripneustes gratilla, Loven, Ech. desc. by Linn., 1887, p. 77. 



Two specimens from Lord Howe Island. The larger is 130 mm. 

 in diameter. 



ECHINOCYAMUS PROYECTUS. 



Echinocyamus provectus, de Meijere, Tijdschr. Ned. Dierk.Vereen., 

 (2) viii., 1903, p. 6. 



17 specimens from Station 13. Off Cape Three Points, 41-50 

 fathoms ; sticky mud and shell. 



6 specimens from Station 57. Off Wata Mooli, 54-59 fathoms; 

 all mud. 



These specimens range from 15 to 8 mm. in long diameter. 

 The larger ones agree in every detail of both internal and external 

 anatomy with de Meijere's description, except that there are 

 rarely more than six pairs of pores on a side in the petals, and 

 usually there are fewer. The smallest specimens can scarcely be 

 distinguished from the males of the next species. 



FIBTJLARIA NUTRIENS.^s sp. nov. 



(Plate Iviii, figs. 1-11.) 



Test ellipsoidal (female) or ovoid (male) in outline, dec dedly 

 flattened, distinctly gibbous actinally and posteriorly, somewhat 

 elevated abactinally and anteriorly in the female. Petals 

 wanting; with a magnification of seventy diameters it is possible 

 to detect ambulacral pores. Genital pores conspicuous (especially 

 in the female), excepting in the posterior iuterambulacrum, 

 where there is none. Ocular pores apparently wanting. A 

 single large madreporic pore can be plainly seen. Actinostome 

 circular, or nearly so, little sunken, posterior to centre of abactinal 

 surface, bare ; teeth rather prominent, the posterior one much the 

 largest. Anal system much wider than long, situated half-way 

 between actinostome and posterior margin. In the female, a 

 lar^e part of the abactinal surface is deeply depressed to form a 

 brood-pouch, into which the four large genital pores open, while 

 the posterior interambulacrum, with the madreporic pore at its 

 tip, projects anteriorly in such a way as to make the brood-pouch 

 horse-shoe shaped, with the opening posterior. In the male, the 



38 jiu<Hens=nursing, in reference to the carhig for the young by the 

 mother. 



