290 University of California Publications. [Zoology 



times that of the fundus and 1.1 to 1.35 times that of the oral 

 margin. In some individuals the lorica is continued beyond 

 the primary oral rim by a cylindrical extension whose diameter 

 is tin 3 same as that of the body behind the oral rim as seen in 

 PI. XXVI, Figs. 4 and 5. A secondary oral rim may appear 

 on the cylindrical extension. No trace of annulation was found 

 in the lorica, 



The wall of the lorica is formed by a single hyaline lamella 

 to whose outer surface numerous highly refractive angular par- 

 ticles adhere. 



This species is most nearly related to T. biitschlii Daday but 

 differs from it in its smaller size, in the absence of annulations, 

 in the more sharply differentiated and sometimes repeated oral 

 rim and in the swollen fundus. 



Dimensions. — Length, 80-108 ix- diameter of fundus, 55- 

 65 //., of the cylindrical part, 40-48 ^., of the oral rim 60-80 /*. 



This species was taken frequently in the summer months in 

 shoal waters near shore and evidently belongs to the coastal 

 plankton. 



Cyttarocylis quadridens sp. no v. 



PI. XXVII, Figs. 8-11. PI. XXVIII, Fig. 18. 



The loi'ica is elongated, vase-shaped, tapering abruptly one- 

 third of the distance from the aboral end to a slender attenuately 

 pointed pedicel which bears in its aboral half an expansion 

 armed with four more or less salient tooth-like projections. The 

 oral opening is about one-fifth of the total length in diameter, 

 is squarely truncate, with a thick, very slightly flaring rim. 

 From the month the body of the lorica tapers slightly to the 

 sloping shoulders which contract to the slender sub-cylindrical 

 pedicel whose greatest diameter is about one-sixth that of the 

 mouth. The pedicel tapers gradually to about one-half its 

 initial diameter and then spreads into a quadrangular skirt- 

 like expansion which bears the four posteriorly spreading spines 

 on its angles. The diagonal width is here about equal to the 

 initial diameter of the pedicel. From the recessed posterior 

 face of this expansion arises an attenuate terminal spine. The 

 cavity of the lorica is constricted abruptly in the expanded 



