UNIVERSITY OF CALIFORNIA PUBLICATIONS 



ZOOLOGY 



Vol. 1, No. 9, pp. 287-306, Pis. 26-28 July 21, 1905 



SOME NEW TINTINNIDAE FROM THE 



PLANKTON OP THE SAN DIEGO 



REGION 



(From the San Diego Marine Biological Laboratory of the University 

 of California.) 



BY 



CHARLES ATWOOD KOFOID 



The following Ciliates belonging to the family Tintinnidai 

 have occurred in the collections made at the San Diego Marine 

 Biological Laboratory in 1908-1905. They appear to be as yd 

 undescribed and are of considerable interest in several instances 

 owing to the highly specialized nature of the external shells or 

 loricae which these simple unicellular animals have formed in 

 adaptation to a pelagic life. 



I am indebted to Mr. R. D. Williams and Mr. John F. 

 Bovard, assistants at the San Diego Laboratory, for some of the 

 observations recorded and several of the sketches utilized in this 

 paper. 



Tintinnus serratus sp. nov. 



PI, XXVI. Fig. 1. 



The loriea of this species is tubular, with slightly flaring 

 ends. Its length is about twelve times its least diameter which is 

 near the aboral end. It gradually enlarges anteriorly, attaining 

 .just behind the anterior flare a diameter one and one half times 

 that in front of the posterior flare. Both ends are open, the 

 diameter of the aboral aperture heing three-fifths of the oral. 

 Within a short distance of each the wall of the loriea flares 



