NO. 1 BARNARD : AMPHIPODA OF THE FAMILY AMPELISCIDAE 1 1 



(1), 1288-41 (1), 1289-41 (1), 1294-41 (1), 1412-41 (2). Albe- 

 marle Island, Galapagos Islands, off Cape Cristopher, dip-net, January 

 16, 1932. 



Remarks: The second specimen from Station 1412-41 (8 mm) 

 has the second antenna broken at the fourth article ; the specimen from 

 Station 1388-41 (7 mm) has a very short fourth article of antenna 2 

 while the fifth article remains as long as in the female. The antennae 

 of these two specimens are much stouter than in the female but lack 

 setal tufts; although in the specimen from Station 1388-41 (which 

 was about to molt at the time of collecting) there is a series of striations 

 under the outer cuticle which follows the same pattern as the setal 

 tufts typical of the male of other species. In addition, the third uropods 

 have longer setae. 



This species is similar to Ampelisca scabripes Walker (1904) but 

 differs in the blunt shape of the tooth on pleon segment 3, the lack of 

 the scabrous condition of the lobe of article 3 of peraeopods 3 and 4, 

 and the rather smooth edges of the rami of the third uropods. The lobe 

 of article 2 of peraeopod 3 is also wider in Ampelisca milleri. 



Ampelisca milleri resembles A. tenuicornis Lilljeborg (1855) but 

 has a stronger process on pleon segment 4, longer antennae, and a 

 strong process on article 5 of peraeopods 3 and 4. From Ampelisca 

 hupferi Schellenberg (1925) it differs in the structure of peraeopods 

 3 and 4, the stouter third uropods, and the relative proportions of arti- 

 cles 5 and 6 of peraeopod 5. It is distinguished from Ampelisca rubra 

 Chevreux (1925) by the shape of the head, the size of eyes, the shape 

 of pleon segment 3, and the rami of uropod 3. 



Distribution: Channel Islands, off the coast of southern California, 

 34 to 103 fms; Gulf of California at Isla Partida, Tiburon Island, 

 Espiritu Santo Island, 10 to 55 fms; Tangola Tangola Bay and Ten- 

 acatita Bay, Mexico, 15 to 25 fms; Port Parker and Playa Blanca, 

 Costa Rica, 5 to 15 fms; Secas Islands, Panama, 25 fms; off Santa Elena 

 Bay, Ecuador, 8 to 10 fms; Albemarle Island, Galapagos Islands 

 surface. 



Ampelisca lobata Holmes 



Plates 5 and 6 



Ampelisca lobata Holmes (1908), Proc. U. S. Natl. Mus., vol. 35, no 

 1654, pp. 517-518, fig. 25; Shoemaker (1942), Smithsonian 

 Misc. Coll., vol. 101, no. 11, p. 7. 



Ampelisca articulata Stout (1913), Zool. Jahrb., Syst., vol. 34, pp. 

 639-640. 



