UNIVERSITY OF CALIFORNIA PUBLICATIONS 

 ZOOLOGY 



Vol. 1, No. 5, pp. 171-210, Pis. 17-20 February 20, 1904 



STUDIES ON THE ECOLOGY, MORPHOL- 

 OGY, AND SPECIOLOGY OF THE 

 YOUNG OF SOME ENTEROPNEUSTA 

 OF WESTERN NORTH AMERICA. 



BY 



W.M. E. BITTEH and B. M. DAVIS. 



(From the San Diego Marine Biological Laboratory of the University 

 of California.) 



CONTEXTS. 



PAGE 



1. Toniariii i-illm Spengel* 171 



(a) Occurrence 171' 



I b) Specific Characters and some morphological points of special 



interest 174 



(<■) Ecology 186 



'J. Tormina Ititbhanlt, n. sp l! |s 



:>. Absence of the tornaria stage in the development of Dolichoglossus 



pusillus Bitter (M S) - 200 



In August, 1893, while the marine biological work of the 

 University of California was being carried ou at Santa Catalina 

 Island on the coast of southern California, a few specimens of 

 an undescribed species of tornaria were taken, Ritter. '!(4. 

 The larva was not obtained again until June and July last. 

 Throughout the period of work at San Diego last summer, the 

 species was one of the most constant organisms of the plankton. 



As only a few individuals of the new form were obtained in 



*ln the original description of this tornaria no name was given it. Spengel, '9», 



in his notice of the description proposed the name here recognized in a< rdance 



with tlie course pursued by him in naming the older species, 



