62 U.S. NATIONAL MUSEUM BULLETIN 292 



Ovigeroiis specimens of A. innocous were collected in all months 

 in which the species was taken: January, February, March, May, 

 August, September, and October. 



7. Atya lanipes Holthuis 

 FiGUKE 14c 

 Atya lanipes Holthuis, 1963a, p. 61, figs. 1, 2 [type-locality: Saint Thomas]. 



Diagnosis. — Orbital margin unarmed. Rostrum unarmed dorsally, 

 lateral lobes represented only by very slight broadening of proximal half 

 of rostrum, ventral margin armed with two or three teeth, not regularly 

 serrate. Ventral margins of abdominal pleura unarmed. Basal segment 

 of antennular peduncle without dorsal spines proximal to series 

 bordering distal margin. Pereiopods without exopods. Fingers of 

 chelae of first and second pereiopods bearing tufts of long hair. Carpus 

 of second pereiopod broader than long. Last three pereiopods without 

 horny scales or tubercles. Merus, carpus, and propodus of third 

 pereiopods not swollen, only slightly more robust than those of fourth 

 pereiopod. Appendix masculina on second pleopod of male forming 

 broad lobe bordered with slender curved spines. A moderately large 

 species, maximum postorbital carapace length at least 28 mm. 



Habitat. — Fresh water. 



Distribution. — Puerto Rico and Saint Thomas. 



Remarks. — This species is represented in the national collections 

 by 10 lots from Puerto Rico containing 16 males (carapace lengths 

 4.2-28.0 mm) and 15 females (cl 4.9-21.8 mm), including 9 with 

 eggs (cl 9.4-17.7 mm). The documentation with these lots is as 

 follows : 



Rio Culebrinas at Rt. 13, 1,000 m south and 300 m east of San Sebastidn; 

 June 2, 1953; H. W. Harry. 



Rfo Maricao at Maricao; February 9, 1951; N. T. Mattox. 



Freshwater streams at Jayuya; spring 1954; L. A. Costas Grana. 



Rio Lajas, 2,800 m east and 3,000 m south of Vega Alta; May 8, 1953; H. W. 

 Harry. 



Rio Cibuco at Rt. 20, 1,500 m south and 3,500 m west of Corozal; May 5, 1953; 

 H. W. Harry. 



Corozal Rio Manati at road from Corozal to Orcovis (S54-7); November 23, 

 1954; C. L. Smith and H. W. Harry. 



El Yunque tributary to Rfo Mameyes at Rt. 112, 100 m north and 1,500 m 

 east of El Yunque summit; June 8, 1953; H. W. Harry. 



El Yunque pool below dam in Rio Cubuy at Rt. 112, 500 m south and 1,000 m 

 west of El Yunque summit; June 8, 1953; H. W. Harry. 



It is surprising that a species as distinctive as A. lanipes and as 

 widely distributed through the length and breadth of Puerto Rico, 

 as the above records would indicate, has escaped notice so long. 

 The Puerto Rican material agrees well with the original description, 



