02 STALK-EYED CRUSTACEA. 
fathoms. The other species is represented by a single example from Sta- 
tion 3425, 680 fathoms, and is portrayed on Plate X., Fig. 2. The rostrum 
in this specimen is more than one half as long as the rest of the carapace, 
and is forked at the tip, as in Z. maia (Linn.) and L. murrayi Hend. There 
is a long spine on the lower side of the base of the rostrum, directed for- 
ward, and there are two pairs of lateral rostral spines. The second anten- 
nal segment is armed with a long spine which bears a short spinule on its 
outer side near the base. Length of carapace without the rostrum, 17 mm. ; 
length of rostrum, 9 mm.; breadth of carapace, 16 mm. 
Famity CCENOBITID. 
CaGENOBITA Larr. 
Fam. Nat. pp. 276, 277, 1825 [Cénobite]; Ouvier’s Regne Animal, 2° éd., [V. 77, 1829 [ Cenobita]. 
Coenobita compressus Gu#r. 
Voyage de ‘ La Coquille,” Zool., T. II., Part II., 1'¢ Div., p. 29, 1830. 
Indefatigable Island, Galapagos, 1 male in shell of Nerita scabricosta. 
Acapulco, Mexico, 21 specimens in shells of Nerita, Nassa, Murex, Terebra, 
Purpura, Modulus, Cerithium, Natica, ete. 
Guérin’s types of this widely distributed and variable species came from 
Payta, Peru. <A recent revision of the genus Cenobita, by E. L. Bouvier, will 
be found in Bull. de la Soe. Philomath. de Paris, 8°" Sér., II. 143-150, 1890, 
and III. 21, 1891. 
Famity PAGURID A. 
CANCELLUS M. Epw. 
Ann. Sci. Nat., Zool., 2° Sér., VI. 262, 286, 1836. 
Cancellus tanneri Fax. 
Plate XI., Fig. 1-1". 
Bull. Mus. Comp. Zodl., XXIV. 167, 1893. 
The anterior part of the carapace, in front of the cervical suture, is 
calcified, about as broad as long; the anterior margin is produced to form 
a rudimentary triangular rostrum between the eye-stalks, and concave on 
each side of the median line; the antero-lateral angles project forward as far 
as the rostrum and are broadly rounded; the infero-lateral margin is densely 
