48 CRUSTACEA OF ALABAMA. 



3 



Cambarus blandingii, Hagen, var. acuta, Faxton 



& 



4. Cambarus clarkii, Girard. 



5. Cambarus compressors, Faxton. 



6. Cambarus diogenes, Girard? (= C. obesus, Hagen.) 



7. Cambarus forceps, Faxton. 

 Cambarus girardiauus, Faxton. 

 Cambarus hayi, Faxton. (?) 



10. Cambarus immunis, Hagen. 



11. Cambarus latimamis, Hagen. 



12. Cambarus lecontei, Hagen. 



13. Cambarus penicillatus, Hagen. (??) 



14. Cambarus spinosus, Bundy. 



15. Cambarus versutus ; Hagen. 



For descriptions of these species the reader is referred to Walter Faxon's Revision 

 of the Astacidae, Mem. Mus. Comp. Z00L, 1885. 



ADDENDA. 

 Galigus americanus. Dana and Hanck? 



(Plate I, Fig. 16.) 



A young fish-louse resembling this species was secured far out in Mississippi sound, 

 among plants. These animals possess many remarkable peculiarities, most noticable of 

 which are the large sucker-like organs upon the front, once mistaken for eyes. The 

 mouth parts are curiously reduced and the anterior limbs become claws for grappling the 

 scales of fish upon which they are parasitic. The most complete account of the anato- 

 my of this genus remains that prepared by Dana and Herrick, in 1838. 



Corycaeus subulatus, s P- n - 



(Plate I, Fig. 7, A and B. ) 



A species of this genus closely allied to C. varius, Dana, but apparently undescribed, 

 occurs in the Gulf of Mexico. The body is moderateiy extended, the first segment of 

 thorax about once and one-half the stylets. The third segment is greatly produced lat- 

 erally. The abdomen is small and the stylets rather long even for the genus. 



Antennae of moderate length, six-jointed and armed with long setae, there being two 

 from the second joint and four from the sixth, while the others have one each, except the 

 first, which bears a number of short ones. The second antennae are well developed, the 

 first segment in the male being short and quadrate, bearing two stout spines, the second is 

 large, lamellate and variously excavated and toothed at its distal margin, the third joint 

 is very short, but bears two rather short claws, the fourth segment is longer and carries 



