161 
Hippolyte layi Owen, 1. c., p. 90, p. xxvii, f. 3. 
Owen’s description of this species is very brief and the rostrum only 
is figured. Two examples in the collection of the California Academy 
from the west coast of Alaska, north of Behring’s Straits, agree so 
nearly with H. layi in the form of rostrum that I believe them iden- 
tical. According to Owen the rostrum has ten spines above and four 
below, besides the terminal tooth. The specimens above referred to 
have, as in Owen’s figure, a long lamellate ensiform rostrum, below 
well in front of the eyes are five nearly equal teeth, directed forwards, 
rostral tip long and sharp; above with seven unequally spaced teeth, 
the three posterior ones near together and on the carapax. Rostrum 
as long as or longer than the carapax, and has a thickened midrib 
from which the spines project as lamelle of varying width. Antennal 
spine prominent. One specimen has a prominent spine upon the ab- 
domen at the bend of its central segment. External maxillipeds 
comparitively short, and hidden entirely beneath the antennal scales. 
Basal joint of antennule spinose. Total length 1? inches. 
Palzemon longipes. Nov. sp. 
Rostrum longer than antennal scale, reflexed towards extremity, 
armed with eight teeth above, and six below, without including the 
slender bifid terminal tooth. First teeth on upper margin, small, sit- 
uated on the carapax, and separated from the following six, which are 
close together, eighth tooth nearer the tip than to the seventh tooth. 
Six lower teeth nearly equidistant, the first (beginning at the rear) 
immediately beneath the sixth of the upper series, the sixth beneath 
the eighth upper tooth. A spine on each side of the carapax, imme- 
diately above the antennal scale, and a second spine farther back and 
slightly below the first. Peduncle of antennule shorter than the an- 
tennal scale, basal joint armed with a strong spine externally, two 
external flagella united for some distance, the inner of the two very 
short, the outer very long, exceeding in length the internal flagella. 
Antennal scale longer than peduncle of autennule, flagellum as long 
as the body from tip of rostrum to tail. 
External maxillipeds, when extended, reaching somewhat beyond 
the antennal peduncle, slender, setose, especially on the terminal joint. 
First pair of limbs slender, cylindrical, meros half as long again as 
ischium, carpus longer than meros, and three times as long as the ma- 
nus; fingers blue, closely fitting, nearly as long as palmer portion of 
manus. 
Second pair of legs exceedingly long and slender (in the male), is- 
chium comparatively short and very slender; meros more than twice 
as long as ischium, and stouter; carpus exceeding the meros by two 
ESSEX INST. BULL. dic 13 
