534 RANKIN. 



Pagitriis sulcatiLS M. -Edwards, Hist. Nat. Crust., II., p. 230, 



1834. 



iSlot Calcinus tibicen (M. -Edwards), 1. c. p. 229 ; Dana (Crust., 

 p. 458) ; and authors. 



The original description of Cancer tibicen by Herbst, as 

 pointed out by Hilgendorf (see Henderson, Chal. Anomura, p. 

 61.), agrees with the West Indian C. snlcatus (M.-Ed.) ; and the 

 C. tibicen, as described by Milne-Edwards from the South Seas, 

 is another species. I consider, therefore, that this Bermudan 

 and West Indian form should take the name C. tibicen (Herbst), 

 and that C. snlcatus (M.-Ed.) should be a synonym. Milne-Ed- 

 wards' short description of C. snlcatus agrees well with my spec- 

 imens, except that the furrow on the propodos of the third per- 

 eiopod is placed by him, probably by mistake, on the right side 

 instead of the left. 



Heilprin, in his list, identifies his specimens as C. obscurns 

 Stimp. (Annals Lyceum Nat. Hist. N. Y., VII., p. 83, 1862). 

 As Stimpson's specimens are from Panama, and as he describes 

 the ambulatory feet as " dark-olive, almost black," it is probable 

 that these Bermuda forms should not be referred to C. obscuriis. 

 I add from my material a more complete description of the species : 



Calcinus tibicen (Herbst). 



Carapace and ^appendages minutely and closely punctate. 

 Carapace and chelipeds reddish-brown, a darker area in center of 

 tergum ; back of cephalo-thoracic groove lighter, more or less 

 mottled with dark spots ; rostrum minute ; optic peduncles above 

 orange, slightly darker at ends, terminating distally with a white 

 band ; below of a lighter shade, longer than the peduncles of the 

 inner antennae. Ocular scales appressed, triangular, with red 

 base and white tips ; cornea black. 



Inner antennae : dark-browai peduncle and orange flagellum. 

 Outer antennae ; basal joint and spine dark-red, distal joint and 

 flagellum orange. First pair of pereiopods : chelae reddish- 

 brown, tips of fingers white, somewhat excavated ; the upper 

 margin of smaller hand with blunt keel and without any ser- 

 rations. 



