84 MATTOX 



Fig. 2. A cluster of 15 Laqueus californianus attached to two Tere- 

 br alalia occidentalis. 



Fig. 3. Two individuals of Glottidia alhida. 



Fig. 4. A group of Terehratalia occidentalis arranged to indicate 

 shell variation. Individual "a" resembles T. arnoldi; "b-f" 

 are typical T. occidentalis; "g-j" resembles the subspecies 

 obsoleta; "k and 1" resemble form of Miogryphus willetti. 

 All are from one area oflE Catalina Island. 



Fig. 5. A group of Terehratalia transversa indicating shell-form 

 variation, "a, b, c, d, and j" represent the form described as 

 subspecies caurina (individual "1" from Oldroyd collection 

 labeled as T. transversa caurina) ; individuals "e, f, g, and 

 h" are typical T. transversa (individuals "e and h" are from 

 the Oldroyd collection labeled as T. transversa). 



