CLADOCERA AND HALOCYPRIDAi—BRADY. ; 7 
3. CoNCHOECIA HETTACRA G. W. Willer. 
(Plate XVII, figs. 1-5.) 
1906. Conchoecia hettacra G. W. Miiller—L.C., Taf. XXIX, figs. 11-19. 
Length 2:30 mm. Seen laterally the width of the shell is equal to one half of 
the length, the subrostral sinus is fairly well developed. The anterior and posterior 
extremities are obliquely rounded, and the posterior ventral angle is obtuse and 
toothless; the peculiar nodulated principal seta of the anterior antenna of the male 
is a sufficiently distinctive character of the species; the capitulum of the frontal tentacle 
is broadly dilated at the base, and clubbed at the apex; secondary branch of the posterior 
antenna bearing two small lateral sete and a strong rectangularly bent falciform claw : 
inthe female only two small sete and an almost obsolete wart-like process. 
C. hettacra occurred in the following localities probably also in others where it 
may have escaped notice :— 
Off Maria Island, Tasmania, tow-net in 45 fathoms (4th January, 1914), 30 
fathoms (6th January, 1914), 100 fathoms (9th January, 1914), and 10th January, 
1914). 
4. CONCHOECIA PARTHENODA G. W. Miiller. 
1906. Conchoecia parthenoda G. W. Miller—Taf. XVI, figs. 24-29. 
(Plate XVII, figs. 6-9.) 
Female.—Length 1 mm. Seen laterally the width is equal to considerably more 
than half the length; rostrum very sharp and prominent, postero-ventral angle obtuse, 
subrostral sinus very shallow. Frontal tentacle stylet-shaped, with sharp apex, capitulum 
scarcely separate from the stem. 
Dr. Miiller points out that this species is very closely related to C. obtusata and 
C. spinirostris —being in fact only doubtfully separated from them. The only specimens 
I have seen—not more than one or two— are from a tow-netting at a depth of 100 
fathoms (10th January, 1914). 
Genus ARCHICONCHOECIA G. W. Miiller, 1894.* 
1. ARCHICONCHOECIA MULLERI sp. nov. 
(Plate XVI, figs. 1-6.) 
Female.—Length 0-6 mm. Seen laterally the width is equal to three-fourths 
of the length; dorsal margin slightly convex towards the front, ventral very strongly 
convex throughout; rostrum short and sharply pointed, the subjacent sinus very wide 
and shallow; posterior extremity wide and truncate, almost straight, with rather 
prominent dorsal and ventral angles; seen dorsally the outline is oval, widest in the 
*Die Ostracoden des Golfes von Neapel. 
