Vol. l] Kofoid. — Some New Tintinnidae. 295 



Cyttarocylis torta sp. qov. 



PI. XXVII, Figs. 12-15. PI. XXVIII, Pigs. 16, 17. 



This species has many points in common with the preced- 

 ing. In proportions and form of the lorica, the relations of 

 cylindrical portion and pediet-I. and in the form of the expan- 

 sion and terminal spine the two species are counterparts. 

 C. torta differs from C. pulchra, however, in two prominent 

 details of structure which have been constant in all of the 

 numerous individuals of the species which have come under my 

 observation. In the first place the annulation is not formed by 

 1-3 distinct rings as in C. pulchra but by a very broad thickened 

 band whose anterior and posterior margins arc somewhat 

 enlarged, a condition which might arise by the thickening of 

 the region between the first and second rings in C. pulchra. The 

 anterior thickening is usually less prominent than the posterior 

 and the intermediate belt is not uniformly or symmetrically 

 thickened on all sides, thus presenting a variety of margins as 

 the lorica is rolled about. A second narrowed ring is found in 

 some individuals behind the broad band, and as in the two ridges 

 in front of it, its anterior face is less abrupt than the posterior 

 one, differing in this particular from the evenly rounded rings 

 on C. pub hut. 



The second structural feature differentiating this species 

 from C. pulchra is the marked torsion of the quadrangular por- 

 tion of the pedicel, which makes a turn of 90°-180° from right 

 over to left (c/. Figs. 14 and 15). The torsion appears in the 

 prominent lines which form the angles of this part of the 

 pedicel and also in the several — usually three — fainter lines dis- 

 tributed on each face between the angles. These lines in com 

 nioii with those upon the angles, terminate in projecting points 

 along the margin of the skirt-like expansion. There is some 

 irregularity among different individuals in the number and dis- 

 tribution of these intermediate lines. The direction of the tor- 

 sion is uniform in all loricae examined. 



The finer structure of the lorica is essentially similar to that 

 of C. pulchra as shown in the figures. The quadrangular por- 

 tion of the pedicel is thick-walled occluding the lumen to a 



