300 



" THETIS " SCIENTIFIC RESULTS. 



are more prominent, from which ridges and furrows extend 

 upwards into the valve. Ohondrophore oblique, submedian. 



PlIILOBRYA PECTINATA. 



Fig. 46. 

 Byssal notch small. Hinge crenulations well developed both 

 anteriorly and posterioi'ly. Length, 2 ; height, 2-5 mm. 



This species is nearest related to P. tatei, Hedley,* from which 

 it is immediately distinguished by the sloping posterior dorsal 

 margin and narrower contour. By the kindness of Mr. J. 

 Dennant I am enabled to compare the novelty with P. bernardi, 

 Tate,t which is longer, narrower, more inflated, and has the 

 interior margin broader and more tuberculated than the recent 

 species. The dimensions of P. hp.rnardi were not stated in the 

 original description, so this opportunity is taken to note that the 

 co-type from Shelf ord is 1-9 mm. in length and 2-8 in height. 



Several valves from 41-.50 fathoms off Cape Three Points, and 

 from 63-75 fathoms off Port Kembla. 



PHILOBRYA TATEI, Hedley. 

 Philohrya tatei^ Hedley, Rec. Aust. Mus., iv., 1901, p. 24, f. 6. 

 Stations 13, 49. 

 Numerous separate valves were taken with the preceding species. 



PHILOBRYA CRENATULIFERA, Tate, sp. 



Myrina crenatulifera, Tate, Trans. Roy. Soc. S.A., xv., 1892, 

 p. 131, pi. i., f. 11, 11a. 



Stations 13, 49. 



One valve was taken at each locality, neither of which showed 

 the characteristic colour of southern specimens. 



• Hedley— Rec. Aust. Mus., iv., 1901, p. 24, f. 6. 



t Tate— Trans. Hoy. Soc. 8.A., xxii., 18!)8, p. 88, pi. iv., f. 10. 



