260 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [554] 
In life the males are semitranslucent and nearly colorless, while in the 
females the antennulz, the flagella of the antenne, the ocular pedun- 
cles, the thorax with the marsupial pouch, and the articulations of the 
eaudal appendages are beautiful rose color. 
Length of a male, 6.0™; carapax along the dorsal line, 1.8; antennal 
scale, 0.70; telson, 0.90. Length of a female, 8.5™"; carapax, 2.5; an- 
tennal scale, 0.88; telson, 1.16. 
The absence of the sexual appendages from the antennule of the male, 
the peculiar structure of the anterior legs, and the similarity of the 
abdominal appendages in the two sexes, at once separate the genus 
Heteromysis from all known allied genera. 
‘THYSANOPODA, species. (402.) 
A great number of small specimens were taken froin the stomach of 
mackerel caught twenty miles off No Man’s Land, July 18, 1871. 
Several were also caught swimming at the surface in Vineyard Sound, 
April 30, 1873, by V. N. Edwards. 
A single specimen of a species apparently the same as this was taken 
at New Haven, Connecticut, May 5, 1873, by Professor D. C. Eaton. 
CUMACEA. 
DIASTYLIS QUADRISPINOSA, G. O. Sars. Plate III, fig. 13. (p. 507.) 
Ofversight af Kongl. Vet.-Akad. Firh., 1871, Stockholm, p. 72. 
Dredged in 23 fathoms of Martha’s Vineyard and in 29 fathoms of 
Buzzard’s Bay. It is also found in the Bay of Fundy. Sars’s specimens 
were dredged by the Josephine expedition in 18 fathoms off Skinnecock 
Bay, Long Island, and in 30 to 35 fathoms, latitude 39° 54’ north, lon- 
gitude 73° 15’ west, off the coast of New Jersey. 
Our specimens agree well with Sars’s description, except that the sec- 
ond segment of the inner ramus of the lateral caudal appendages has 
but three, or rarely four, spines upon the inner margin, while in Sars’s 
Specimens there were five. 
DIASTYLIS SCULPTA Sars. 
Loe. cit., p. 71. 
With the last species, in 18 fathoms, off Skinnecock Bay, according to 
Sars. 
DIASLYLIS ABBREVIATA Sars. 
Loc. cit., p. 74. 
Rare in 30 to 35 fathoms, off the coast of New Jersey, with the 
first species, (Sars.) 
EEUDORELLA PUSILLA Sars. 
Loe. cit., p. 79. 
Not infrequent in 18 fathoms, off Skinnecock Bay, (Sars.) 
