46 U.S. NATIONAL MUSEUM BULLETIN 2 59 



Two ovigerous females (4.50 mm long) were obtained from Fox 

 Cave in April 1965; the number of eggs in the respective brood 

 pouches being two and four. 



pizziNii Group 



Diagnosis. — Adult size range up to about 19.00 mm. Males 

 larger than females. Antenna 1 usually between 20 and 30 percent 

 longer than atenna 2, between 45 and 60 percent as long as body; 

 accessory flagellum as long as, or slightly longer than, first 2 segments 

 of primary flagellum. Mouth parts corresponding generally to those 

 figm-ed by Shoemaker (1942a, fig. 12) and as follows: Mandible well 

 developed; 3rd palpal segment with 8 to 10 long setae. MaxUla 1 

 with 4 to 6 plumose setae on apex of inner plate. Maxilla 2, inner 

 plate with 3 to 6 long, obliquely placed, plumose setae. Maxilliped, 

 inner plate with 5 or 6 thick spines apically. Lower lip with well- 

 developed inner lobes. First gnathopodal propod about twice as 

 large as 2nd; palmar margin oblique, relatively straight, with a prom- 

 inent distal excavation or notch in sexually mature males. Second 

 gnathopodal propod palmar margin straight, shorter and less heavily 

 armed, distal notch absent. Coxal plates of pereopods 2 and 3 about 

 as broad as long; that of pereopod 4 about as broad as long and 

 extending distally for 40 to 50 percent the length of segment 2. 

 Pereopod 7 about 50 percent as long as body, a little longer than 

 pereopod 6 and about 40 percent longer than pereopod 5. Basis of 

 pereopod 7 of mature male elongate, up to 2/3 as long as the com- 

 bined lengths of segments 3-7, with a prominent distoanterior lobe 

 extending ventrally beyond the 3rd segment. Bases of pereopods 

 5-7 with broadly expanded, convex posterior margins in both sexes. 

 Segment 4 of pereopods 5 and 6 broader in mature males than in 

 mature females. Abdominal side plates: posterior margins convex, 

 armed with 3 to 6 setae; posterior corners rounded, usually indistinct; 

 ventral margins with 2 to 5 spines each. Pleopod 1, inner ramus 

 nearly twice as long as peduncle. Uropod 1 with up to 42 spines; 

 outer ramus 80 to 90 percent as long as inner ramus, about 50 percent 

 as long as peduncle. Uropod 2 with 22 to 30 spines; outer ramus 

 up to 75 percent as long as inner ramus, more than 50 percent as 

 long as peduncle. Uropod 3, ramus with up to 3 unequal, apical 

 spines. Telson with 2 or more lateral spines; apex convex, with up 

 to 13 or 14 spines. 



Relationship. — The inzzinii group has its closest morphological 

 and ecological affinities with the tenuis group. Excepting male 

 secondary sex characters, the morphological alliance between these 

 two groups is exemplified by similarities in size and structure of 



