Notes on Pacific Coast Pycnogonids 



\V. A. HILTON 



The specimens reported on at this time were obtained at Laguna Beach in the 

 summer of 1920. Their collection was more or less incidental to other littoral explora- 

 tions. There Is also included a list of forms obtained at other times and at other 

 places, chiefly during the same summer at Pacific Grove. 

 Pallene calijorniensis, Hall. 



Two of these were collected at Laguna Beach. 

 Lecythorhynchus marginatus. Cole. 



Twelve specimens collected at Laguna Beach from among mussels, under rocks, 

 among algae, etc. One specimen was dredged of San Diego in 1916. Thirty-four were 

 collected on the land side of Catalina Island at the Isthmus in quite a different type of 

 locality from that which is usual. At this place there were few red Algae but 

 masses of a rather fine brown rock-weed. On these plants, hydroids and bryozoans 

 were quite abundant. Many more might have been collected if there had been time. 



Among Algae in front of the Hopkins Laboratory at Pacific Grove IS specimens 

 of this species were found. One was collected at the "Big Tide Pool." 

 Ammothella ttiherculata. Cole. 



Twenty specimens found in front of the Hopkins Laboratory at Pacific Grove. 

 One found at low tide in the "Big Tide Pool." None found at Laguna this season. 

 A. bi-unguiculata, Dohrn, far. calijornica, Hall. 



Twelve of these obtained at Laguna Beach under stones. Three specimens at the 

 Isthmus, Catalina Island. 

 A. spinosissima. Hall. 



Seven specimens collected at Laguna Beach. Two obtained at Pacific Grove in 

 front of the laboratory. 

 Tanystylum intermedium. Cole. 



Twenty-five specimens from Laguna Beach. 

 Clotenia occidentalis, Cole. 



Ten specimens from Laguna Beach. Sixtey-three specimens from in front of the 

 Hopkins marine station, some were found on plume hydroids and among Algae. 

 Halosoma viridintestinalts. Cole. 



We usually find a number of this species at Laguna Beach but none were found 

 this season. At Pacific Grove 68 were collected from masses of fine bryozoans from 

 floating timbers. 

 Amoplodactylus erectus. Cole. 



Specimens of this species may be obtained at Balboa among tubularian hydroids, 

 a hundred or more were collected from this locality this year and one from Anaheim 

 Landing with palm hydroids. 

 A. califortiicus, Hall. 



Three specimens from Laguna Beach, 6 specimens from the Isthmus, Catalina 

 Island, 1 specimen in front of the laboratory. Pacific Grove. 

 Pycnogonum stearnsi, Ives. 



Seven specimens from Laguna Beach, 1 specimen from Pacific Grove. 



(Contribution from the Zoological Laboratory of Pomona College) 



