366 THE GENUS CALLINECTES-M. J. RATHBIX. 



Neniiy all the specimeus collected by the Albatross are young. 

 Ordway gives as the locality for this species "Piuicate Bay, Gulf of 

 California, Mus. S. I." The type is not extant. 



CALLINECTES NITIDUS, A. Milne-Edwards.' 



Callhiectesnitidiis, A. Milne-Edwards, Crust. Reg. Mex., p. 228, 1879 (variety of 



CaUinectes diacanthus). 

 CaUhiectcs diacanthus, van CaUinectes nitidus, A. Milne-Edwards, Crust. Reo-. 



Mex., explanation of pi. XLi, 1879. 

 CaUinectes diacanthus, A. Milxe-Edwards, Crust. Reg. Mex., pi. xli, 1879. 

 In this CaUinectes the carapace is broad and the antero-lateral 

 borders form a curve of a large circle; the teeth are large and strong. 

 The front is little advanced; its median teeth are rudimentary, sepa- 

 rated from each other by a well-marked notch, below which can be seen 

 the projection of the epistome, which is very prominent. The carapace 

 is ornamented with very fine granulations, and has a more shining 

 appearance than ordinary. The abdomen of the male is narrow; in 

 all the examples which I have examined the penultimate article has a 

 membranous articulation at its base. The intromittent organs of the 

 male are slender, straight, and extend to near the extremity of the 

 penultimate article of the abdomen.. 



The carapace is violet; the under side a grayish-yellow, with the 

 exception of the abdomen of the female, which is rose color, and has a 

 black band on each article. The feet are tinged with blue and red. 

 The plate was colored after a sketch made of the living animal by 

 M. Bocourt. The Paris Museum possesses a large number of Gal- 

 Unectes from Chile, which resemble completely those of Guatemala. 



Abundant at Tanesco, Guatemala, on the borders of the Esteros, hid- 

 den in the sand, 



DEFORMITIES. 



On Plate XXIII are shown three deformed claws of CaUinectes 

 sapidus in the collection of the National Museum. They are difterent 

 from those figured by Lucas- and by Faxou.^ 



In aright claw from the Potomac Eiver (fig. 4), received from J. F. H. 

 Sisson, there is a duplication of the dactylus and the index linger, the 

 inner pair being complementary to the outer and not a repetition of 

 the right dactylus and index linger. The outer pair are simple and 

 have each one row of teeth; the inner pair are forked near the tips; 

 the dactylus has one row of teeth continued on both forks; the index 

 linger is broader and has two rows of teeth converging to its base, 

 each row terminating at the tip of a fork. 



In a left claw from Willoughby Point, Virginia (fig. 3), the index is 

 divided into two branches, one above the other. The lower branch 

 corresponds in length to the dactylus and has an upper row of teeth: 



' This species is known to the writer oulj- from Milne-Edwards' description. 

 -Ann. Soc. Entoiu. France (2) II, pi. i, fig. 1. 

 3 Bull. Mus. Conip. Zool., VIII, pi. ii, fig. 5. 



