NO. 1316. SOME CUBAN CRUSTACEANS— HAY. 431 



luui which may extend slightly beyond the middle of the body, and 

 is composed of about twenty-nine segments. The mandil)le. maxilhc, 

 and maxillipeds do not present specific characters of importance, being 

 of the type usual in the genus. The appendages of the mesosome 

 are of moderate strength, and are armed with a few rather stout 

 spines and stiff setse. The branchial appendages of the meta.some are 

 membranaceous and small; the uropoda are well developed, the outer 

 branch lanceolate in outline, the inner much broader and very slightly 

 longer, and with the tip somewhat acuminate; both branches and the 

 margins of the telson as well bear a rather dense fringe of hairs. 

 Color in alcohol, white, with no markings of any kind. Length, 5 mm. 

 This Isopod, which is reported by Dr. Eigenmann to be abundant, 

 is represented in the collection by about twenty-five specimens, all 

 from the one locality. Of the species of C/'rokau/ known to inhabit 

 American waters, C. mayana^ which occurs on the coast of Yucatan 

 and Colombia, is the nearest relative of the present species. Between 

 the two, however, there are several important structural difi'erences. 

 The phj^siological difierences between this species and all the others 

 of the genus must be very great to admit of its living in the subter- 

 ranean streams of fresh water. It may be added that (Jlrolaud cxhen- 

 sis is very distinct from Cirolanides texensis Benedict," which occurs 

 in the waters which flow from the large artesian well at San Marcos, 

 Texas. 



2. ONISCUS ASELLUS Linnaeus. 



Five specimens, for which no locality is given, appear to l)elong 

 here. They answer perfectly the description given by Sars '' from 

 specimens collected in Norway. They are doubtless importations 

 from Europe, and probably came from Spain, where the species is 

 common. 



3. PALiEMONETES EIGENMANNI, new species. 



Types.— Out. No. 26349, U.S.N.M. Cavern at Ashton, Cuba. C. H. 

 Eigenmann. 



Carapace thin, very delicate and transparent, in form slightly com- 

 pressed near the middle of the body but rather broad anteriorly; the 

 anterior border, below the eye, is produced as a broad, obtuse angle, 

 which bears, near its lower margin, an acute, forwardly directed 

 spine; this spine is the anterior end of an obscurely marked ridge, 

 which extends obliquely downward and backward along the, sides 

 of the carapace. The rostrum is long, slender, compressed, and 

 rather markedly upcurved; on its superior margin it bears a row 

 of six or eight slender, acute teeth, which begins well back on the 

 carapace and extends forward to the rostrum; these teeth are directed 



« Benedict, Proc. U. S. Nat. Mus., XVIII, 1896, p. 616. 



b Crust, Norway, II, Pts. 9, 10, 1897, pp. 171, 172. ' 



