NO. 1 BARNARD: AMPHIPODA OF THE FAMILY AMPELISCIDAE 51 



ably had several specimens similiar to those in the present collections, 

 which differ from typical females in the longer antennae and the lack 

 of brood plates. It is possible that these forms represent "intersexes." 

 Distribution: Widely distributed in the Channel Islands and along 

 the coast of southern California, 10 to 275 fms; coast of Lower Cali- 

 fornia at Dewey Channel and north of Todos Santos Island, 21 to 41 

 fms; Gulf of California at Tortuga Island and Puerto Refugio, Angel 

 de la Guardia Island, shore to 45 fms. 



Ampelisca pugetica forma macrodentata, new form 



Plate 36, fig. B 



Description of female: Differing from the typical form only by the 

 greater development of the tooth at the inferoposterior angle of pleon 

 segment 3. In all other respects the material at hand shows character- 

 istics within the range of variability of typical A. pugetica. Male un- 

 known. 



Types: Holotype, AHF no. 417, ovigerous female, 8.5 mm; para- 

 types, 4 females. 



Type locality: Station 1321-41, 2 miles west of Church Rock, 

 Santa Catalina Island, California, 45 to 53 fms. 



Material examined: Stations 116-33 (3), 264-34 (11), 281-34 

 (98), 373-35 (8), 384-35 (4), 385-35 (12), 392-35 (18), 395-35 (1), 

 434-35 (3), 460-35 (1), 468-35 (1), 475-35 (22), 476-35 (1), 541- 

 36 (1), 544-36 (1), 563-36 (2), 566-36 (1), 677-37 (2), 701-37 (9), 

 702-37 (15), 706-37 (5), 823-38 (5), 829-38 (1), 833-38 (1), 845- 

 38 (1), 1055-40 (1), 1202-40 (1), 1321-41 (18), 1780-49 (3), 

 2018-51 (12), 2026-51 (3). Cedros Island, Kenyon-Williams Expe- 

 dition, May 18, 1946 (1). Albemarle Island, Galapagos Islands, dipnet, 

 Jan. 16, 1932 (1). 



Distribution: Point Fermin and Santa Catalina Island, 16 to 53 

 fms ; along the coast of Lower California at Cedros Island, Blanca Bay, 

 and Santa Maria Bay, 8 to 30 fms; Gulf of California at Angel de la 

 Guardia Island, Tiburon Island, Ildefonso Island, Angeles Bay, 8 to 

 65 fms; south of White Friars Islands, Mexico, 25 fms; Costa Rica 

 at Salinas Bay, Playa Blanca, Port Parker, and Port Culebra, shore to 

 20 fms; Octavia Bay, Colombia, 2 fms; Peru at Sechura Bay, San Juan 

 Bay, Independencia Bay, and Lobos de Afuera Islands, 5 to 40 fms; 

 Albemarle Island, Galapagos Islands, surface. 



