Vol. l] Eofoid. — Some New Tintinnidae. 289 



no secondary fenestration. The outer surface of the wall is 

 sparsely strewn with numerous, small, irregular particles of a 

 more highly refractive character than its own structure. 



The animal has the form and structure usual in Tintinnopsis. 

 There are two ellipsoidal nuclei centrally located and in the 

 posterior end a single vacuole whose diameter at diastole equals 

 half that of the lorica. 



A reflexed oral margin is not found in any other species of 

 Tintinnidae. The nearest approach to it appears in the flaring 

 rims of such species as Amphort lla si, , nstrupi, A. acuta, Petalo- 

 tricha ampulla. Tintinnopsis mortenseni, T. biitschlii, and T. 

 campanula. In none of these forms has this flaring rim much 

 greater relative proportions than has the reflexed rim of Tin- 

 tinnopsis reflexa. An exception to this limitation in extent 

 appears to be presented in the problematical organism described 

 by Cleve ('99) as Fungella arctica and referred by him to the 

 Tintinnidae. The significance of this limitation in proportions 

 lies, it seems, in the dependence of this projecting portion of 

 the shell upon the length of tin cilia and intercalary cirri of 

 Hi, adordl ciliary plaits. In T. reflexa the distal edge of the 

 lorica is located approximately at the line where the ends of 

 the cirri of the adoral plates would fall when reflexed. 



The general form of the lorica of this species approaches 

 most nearly to that of T. nitida, described by Brandt ('96) from 

 Karajak-Fjord in Greenland waters. It differs, however, from 

 this species in the posterior reflexion of its more extended rim, 

 in the minuteness and sparseness of the attached particles and 

 in its smaller size. 



Dimensions: — Length, 50/"-; diameter, 20 /u.. 



Taken in a vertical haul from 70 fathoms to surface off 

 San Diego in July. The structure of the shell is indicative of 

 a eupelagic distribution. 



Tintinnopsis dadayi sp. nov. 



PI. XXVI. Figs. 3-5. 



Lorica campanulate with expanded fundus, spreading mar- 

 gin and cylindrical central portion. Its length from apex to 

 primary oral rim is 2 to 2.5 times its central diameter, 1.3 to 1.8 



