New Species of Eriopisa — Barnard 
297 
downward anteriorly into a rounded lobe, 
article 2 not broadly expanded, posterodistal 
corner produced downward into a rounded 
lobe; articles 5 and 6 equal in length, longer 
than 4. 
Peraeopods 4 and 5 successively longer, 
peraeopod 4 intermediate in size between 3 
and 5, peraeopod 5 greatly elongated; coxae 
triangular in shape, not lobed; posterodistal 
corner of article 2 produced downward into 
a subacute lobe, articles 4-6 successively long- 
ger; article 4 about as long as 2. 
Pleopods: outer ramus shorter than inner, 
both elongated, longer than peduncle, each 
with 9 articles. 
Uropods 1 and 2 short, not reaching much 
beyond last urosome segment. Uropod 1 
reaching to end of uropod 2, inner ramus 
nearly as long as peduncle, outer ramus short- 
er than inner. 
Uropod 2: Inner ramus subequal in length 
to peduncle, longer than outer ramus. 
Uropod 3 greatly elongated, nearly one 
half the length of the body. Peduncle very 
short; inner ramus shorter than peduncle, 
conical, tipped with 2 spinules; outer ramus 
very long, more than 5 times as long as 
peduncle, composed of 2 flattened articles 
slightly curved upward at the edges, the dis- 
tal article slightly longer than the proximal 
one, rounded distally and apically setose. 
Telson split, lobes broad, apices oblique, 
serrate, each lobe armed with 2 spines and a 
setule. 
Body very slender, none of the segments 
dorsally carinate or toothed. 
Pleon segment 3/ Lower posterior corner 
produced into an acute tooth. 
FEMALE. — Differing from the male by the 
small second gnathopods, article 6 of which 
resembles gnathopod 1; and by the shorter 
and broader third uropods on which the inner 
ramus is about one half the length of the 
proximal article of the outer ramus. Apices 
of telson more acute (possibly due to the 
juvenility of the females available, as young 
males show this same characteristic). 
TYPES. — Holotype, Allan Hancock Foun- 
dation No. 513, male, 7.2 mm.; paratype, 8.5 
mm. (figured); allotype, female, 5 mm. (fig- 
ured) . 
TYPE LOCALITY.— 'Velero” Station 2066-51, 
Punta Eugenia, Lower California, Mexico, 
November 1, 1951, intertidal, under rock on 
gravel. 
MATERIAL EXAMINED.— The types and 12 
other specimens from the type locality. 
REMARKS. — Four species belonging to the 
genus Eriopisa were previously known. These 
are Eriopisa elongata (Bruzelius, 1859), E. 
philippensis (Chilton, 1920), E. chilkensis (Chil- 
ton, 1921 ), and E. seurati Gauthier (1936). 
They are characterized generally by the fol- 
lowing characters: (1) Inner edge of inner 
plate on maxilla 1 strongly setose; (2) setae 
present on inner edge of inner plate of max- 
illa 2; (3) lower anterior edge of coxa 1 not 
greatly prolonged; (4) mandibular palp with 
setae well developed on article 3 and several 
on article 2, palp well developed structurally; 
(5) gnathopod 2 much larger than 1. The new 
species treated here agrees in concept with 
items 2-5 but not with item 1, as the present 
material has only 3 well-developed setae on 
the inner edge of the inner plate of maxilla 
1, a characteristic of the closely related genus 
Eriopisella Chevreux (1920). The latter was 
separated from Eriopisa by the paucity of 
setae on the inner plates of the first two 
maxillae. 
The known species of the genus Eriopisella 
are E. pusilla Chevreux (1920), E. capensis 
(K. H. Barnard, 1916), and E. sechellensis 
(Chevreux, 1901). The present species is sepa- 
rated from these by the presence of setae on 
the inner edge of the inner plate of maxilla 
2, by the rounded first coxal plate, by the 
armature and stoutness of the mandibular 
palp, by the large size of the distal article of 
the outer ramus of uropod 3, and by the 
diversity in size of the first 2 pairs of gnatho- 
pods. 
Although transgressing the defining cha- 
racters of the genera Eriopisa and Eriopisella 
