GEORGE HODGE ON NEW MARINE ACARI. 303 
of eight such granules, the largest about 5,'55 of an inch 
diameter. 
Upper surface of shield divided by delicately sulcated 
lines into four regions, the interspaces being free from 
markings; the anterior and two lateral spaces may be 
said to represent the thorax, and contain the eyes, whilst 
the posterior may naturally represent the abdominal por- 
tion of the animal. 
An irregular dark line extends from the anterior eye to 
opposite the insertion of the last pair of legs. 
From the peculiar character of the rostrum of this species— 
the absence of true palpi, and the number of eyes, it would 
appear to form the type of a new genus which has accordingly 
been established for its reception. 
It is difficult to say whether the divergent organs, springing 
from the rostrum, should be considered palpi or mandibles; judg- 
ing from analogy, they present the appearance of the former 
as witness their jointed character, but on the other hand, being 
coalescent with the rostrum they may perhaps, with greater 
correctness, be considered as a part of that organ. 
Two specimens have occurred, both obtained from the wash- 
ings of Zoophytes from 20-30 fathoms. 
DESCRIPTION OF PLATE XVI. (In Part). 
Fig. 4,5. Halacarus granulatus, x 55, with cleave &c., x 200. 
Fig. 6,7. Leptognathus faleatus, x 5d, do. x 200. 
fig. 8,9. Halacarus oculatus, x 55, do. x 200. 
Fig 10, 11. Pachygnathus minutus x 55, do. x 400, 
