242 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
Achelia is represented in the collections by five species, one of them 
(A. brevichelifera), diverging from the usual form in that the trunk 
is slender and the lateral processes are widely separated. 
1. Lateral processes touching or narrowly separated, body circular__.________- 2 
Lateral processes separted by about their own width, body oval in out- 
USE Sr Ae a ey Se eee ere brevichelifera, new species (p. 245) 
2. Heel of propodus with large basal spines; abdomen conspicuously longer than 
Tesuex Or ADULUN leg os ee  . e  e e 3 
Heel of propodus without large basal spines; abdomen not longer than first 
3. Auxiliary claws at least half as long as terminal claw; lateral processes narrowly 
Se TRL te) nO EO a Dh ROE RRS eer Da Wee RS, ea OE, Uae SPC a oR spinosa (p. 242) 
Auxiliary claws less than one third as long as terminal claw; lateral processes 
(50) ULES TOY dake ap eae ee ee ee GPO TT scabra (p. 244) 
4. Palpus 7-jointed (penultimate twice as long as terminal joint. gracilis (p. 244) 
Palpus 8-jointed (four terminal joints small)__..._.._____- sawayai (p. 244) 
ACHELIA SPINOSA (Stimpson) Wilson 
FIGURE 38, a, b 
Zetes spinosa STIMPSON, 1853, p. 37. 
Achelia spinosa Wiuson, 1878b, pp. 7-8, pl. 2, fig. 1, a—h. 
Ammothea achelioides W1Lson, 1878b, pp. 16-17, pl. 5, fig. 1, a—e. 
Achelia spinosa Wiuson, 1880, pp. 478-476, pl. 1, fig. 1; pl. 2, fig. 8. 
Ammothea achelioides W1Lson, 1880, pp. 484—485, pl. 4, figs. 19, 20. 
Achelia spinosa WHITEAVES, 1901, p. 262. 
Ammothea achelioides WHITEAVES, 1901, p. 203. 
Ammothea echinata NoRMAN, 1908, p. 224 (part). 
Ammothea (Achelia) echinata? var. spinosa SCHIMKEWITSCH, 1930, pp. 133-136. 
Ammothea spinosa NEEDLER, 1948, p. 16, fig. 20, a-d. 
Record of collection St. Croix River between station toward Joes Point, St. 
Andrews, New Brunswick, August 1913 (dredging), R. W. Miner coll., 1 male 
(AMNB). 
This species is not often collected; there is no material in the col- 
lections of the National Museum and the Peabody Museum collected 
since Wilson’s day. Hence there is little to add to the range estab- 
lished by Wilson (1880), namely, from Long Island Sound (Block 
Island) to Eastport, Maine, and Grand Manan, except this New 
Brunswick record. 
The spiny processes of the first coxal joints which are characteristic 
of this species vary somewhat in size and number. This variation is 
not correlated with sex. Dorsal tubercles on the lateral processes 
are developed in a few of the specimens, similar to those found in 
A. scabra, but they are shorter. The auxiliary claws are always long. 
Norman and several later writers have suggested that A. spinosa is 
the same as A. echinata Hodge, 1864. If so, the name spinosa has 
priority over echinata. Wilson (1880) examined some specimens 
of A. echinata and summarized their differences from spinosa as 
follows: ‘“{A. echinata] has a slender, tapering rostrum (proboscis) 
of a very different shape; the peculiar conical spinous tubercles 
