206 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



Pleosome side plate 3 with, strong posterior spine and 6 facial 

 clusters of plumose setae, 5-10 per cluster; side plates 1 and 2 acumi- 

 nate behind, lower margin of side plate 1 strongly incised. Pleopods : 

 rami with 13-16 distinct segments; peduncles each with 2 coupling 

 spines. 



Uropod 1 : peduncle stout, posterior margin lined with strong spines, 

 largest distally ; outer ramus strong, nearly equal in length to peduncle, 

 margins distally spinose; apical spines long; inner ramus weak, 

 tapering distally, with a few weak posterior spines and slender setae. 

 Uropod 2 large, rami and peduncle subequal, densely setose. Uropod 

 3: rami long and slender, outer ramus with subequal segments each 

 longer than peduncle. Telson very broad, shallow, and deeply 

 cleft; lobes rounded behind, margins with numerous slender stiff 

 setae. 



Remarks. — This species is generally sunilar to A. millsi but more 

 closely resembles A. intermedius in shape of head, peraeopod 5, and 

 uropod 1. The limited material at hand suggests it is a deeper water 

 offshore species of sandy mud bottoms. The species is named in 

 recognition of the significant contributions to the systematics of 

 North American haustoriid amphipods made by the late 

 Mr. C. R. Shoemaker and for his preliminary unpublished diagnoses 

 of several of the species described in this paper. 



Literature Cited 



Barnard, J. L. 



1957. A new genus of haustoriid amphipod from the north-eastern Pacific 



Ocean, and the southern distribution of Urothoe varvarini. Bull. 

 Southern California Acad. Sci., vol. 56, no. 2, pp. 81-84, figs. 



1958. Index to families, genera, and species of garamaridean Amphipods 



(Crustacea). Occ. Pap. Allan Hancock Found., no. 19, 145 pp. 

 1960. The amphipod family Phoxocephalidae in the eastern Pacific Ocean 

 with analysis of other species and notes for a revision of the family. 

 Allan Hancock Pacific Exped., vol. 18, no. 3, pp. 175-375, illustr. 



BOUSFIELD, E. L. 



1956a. Studies on the shore fauna of the St. Lawrence estuary and Gasp6 



coast. Bull. Nat. Mus. Canada, no. 136, pp. 95-101. 

 1956b. Studies on the shore Crustacea collected in eastern Nova Scotia 



and Newfoundland, 1954. Bull. Nat. Mus. Canada, no. 142, 



pp. 127-152. 

 1956c. Malacostracan crustaceans from the shores of western Nova Scotia. 



Proc. Nova Scotia Inst. Sci., vol. 24, no. 1, pp. 25-38. 

 1958a. Fresh-water amphipod crustaceans of glaciated North America. 



Canadian Field Nat., vol. 72, no. 2, pp. 55-113. 

 1958b. Littoral marine arthropods and moUusks from western Nova Scotia. 



Proc. Nova Scotia Inst. Sci., vol. 24, no. 3, pp. 303-325. 

 1962a. Studies on littoral marine arthropods from the Bay of Fundy region. 



Bull. Nat. Mus. Canada, no. 183, pp. 42-62. 



