No. 10 GARTH : BRACHYURAN FAUNA OF THE GALAPAGOS 409 



Family PARTHENOPIDAE 



Subfamily PaRTHENOPINAE 



Genus PARTHENOPE Weber, 1795 



Key to the Galapagos Species of the Genus Parthenope 



A^ Chelipeds more than twice as long as carapace ; carapace broadly 



triangular, sides rounded . . (Subgenus Platylambrus) 

 B^ Three large tubercles on posterior margin, one of which is 



median P. (Platylambrus) exilipes 



A^ Chelipeds less than twice as long as carapace .... 



(Subgenus Pseudolambrus) 



B^ Anterolateral margins without an abrupt angle; upper border 



of chela with 8 or 9 strong teeth P. (Pseudolambrus) triangula 



Subgenus Platylambrus Stimpson, 1871 

 Parthenope (Platylambrus) exilipes (Rathbun) 



Plate 69, Fig. 2 



Lambrus (Parthenolambrus) exilipes Rathbun, Proc. U.S. Nat. Mus., 



vol. 16, p. 234, 1893. 

 Lambrus exilipes Rathbun, Proc. U.S. Nat. Mus., vol. 21, p. 581, 1898. 

 Parthenope (Platylambrus) exilipes Rathbun, Bull. 129, U.S. Nat. Mus., 

 p. 523, pis. 184 and 185; pi. 277, figs. 1-2, and synonymy, 1925. 

 Crane, Zoologica, vol. 22, no. 3, p. 64, 1937. 

 Type locality. — Off San Domingo Point, Lower California. 

 Tj;/.^.— USNM No. 17365. 



Range. — West coast of Lower California (Albatross) to Panama 

 (Albatross) ; Galapagos Islands (Albatross). 



Atlantic analogue. — P. (Platylambrus) pourtalesii (Stimpson). 

 Diagnosis. — Carapace one-third broader than long, branchial regions 

 expanded and inflated, a median tubercle on posterior margin. Lateral 

 teeth short and blunt. 



Material examined (100 specimens from 12 stations). — 

 55-33. Lat. 1° 03' 30'' S, Long. 90° 17' 30" W, 60 fms, Feb. 5, 1933, 



3 males, 3 young. 

 170-34. East of Wreck Bay, Chatham Island, 32 fms, Jan. 21, 1934, 



1 female. 

 171-34. East of Wreck Bay, Chatham Island, 35-40 fms, Jan. 21, 



1934, 2 females, 1 young. 

 185-34. Cartago Bay, Albemarle Island, 32 fms, Jan. 25, 1934, frag- 

 ments. 



