394 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 89 



diflferences they exhibit from the known subspecies and because the 

 various subspecies of C. lucijugus are extremely limited in their dis- 

 tribution. The Eustis specimens have the sides of the rostrum more 

 constricted at the base, the body is slightly less granidate, and the 

 epistome is slightly different. In the Gum Cave forms the mesial 

 process of the first pleopod of the male is directed more laterad. As 

 we have no mature specimens, this subspecies will have to remain 

 without a name. 



CAMBARUS PALUDUS. new species 



Figure 16 



1938. Cambarus acherontis pallidus Hobbs,^ Proc. Florida Acad. Sci., vol. 2, 

 p. 90. Nomen nudum. 



Diagnosis. — An albinistic subterranean species with unpigmented 

 eyes. Rostrum wider at base than at any point along midlength. 

 The sternum just anterior to the annulus ven trails bears large midti- 

 tuberculate processes, which almost fuse along the midventral line. 

 Fii"st pleopod of first-form male bears aU five processes and has a 

 hump on anterior surface. 



Male holotype (Jorm T). — Body in cross section almost cylindrical, 

 slightly flattened dorsoventrally. Abdomen narrower than cephalo- 

 thorax. 



Width of carapace in region of caiidodorsal margin of cervdcal groove 

 much greater than depth. Greatest width of carapace about midway 

 between caudodorsal margin of cervical groove and caudal margin of 

 cephalothorax. 



Areola almost obliterated, about 28 or more times as long as wide, 

 slightly depressed. Cephalic region of carapace about 1.36 times as 

 long as areola. Areola without punctations. Sides parallel for a short 

 distance in middle. 



Rostrum long, acutely tapering. Acumen short; lateral spines small. 

 Apex reaching a little beyond base of third segment of peduncle of 

 antennule; upper surface deeply excavate. Postorbital ridges termi- 

 nating anteriorly in short spines, extending posteriorly about two- 

 thirds the distance between tip of rostrum and cervical groove. 



Surface of carapace tuberculate. Tubercles spiniform. Plane only 

 in areola and gastric region, here smooth and polished. Lateral spines 

 trituberculate (only one spine on either side larger than other tuber- 

 cles). Cephalolateral margins each with one spine near the anterior 

 extremity of cervical groove. 



Abdomen slightly narrower and about the same length as cephalo- 

 thorax. Anterior section of telson with two spines in each of the 

 posterolateral comers. 



' Owing to an unfortunate misunderstanding, this manuscript name, based upon my original erroneous 

 interpretation of L6nnberg's Cambarus acherontis, appeared shortly before the present paper was ready 

 (or publication. 



