122 U.S. NATIONAL MUSEUM BULLETIN 2 59 



percent as long as peduncle, armed with 3 or 4 apical spines. Telson 

 rather long, nearly 50 percent longer than broad, gently narrowing 

 dis tally; convex apex armed with 13 long spines. 



Type locality. — Cascade Caverns, about 5 miles southeast of 

 Boerne, Kendall Co., Tex. The type locality is a medium-sized, 

 commercial cave with a number of pools. It is developed in lower 

 Glen Rose limestone (Cretaceous) and apparently makes up a part 

 of a rather extensive subterranean drainage net common to this area 

 (Reddell, pers. comm.). According to Hubricht (1943), the type 

 material was collected from a pool in this cave. One small specimen 

 of S. russelli was also taken in this collection. 



Remarks. — A thorough search in the type locality during the field 

 work of June 1964, did not result in the acquisition of additional 

 material. 



Distribution and ecology. — S. dejectm is known only from the 

 type locality but may be expected to occur in other caves of southern 

 Kendall Co., Tex. The holotype female appeared to be nearly 

 sexually mature as brood plates were marginally serrate but not yet 

 setose. 



Hubricht (1943) relegated the above material to S. fiagellatus, but 

 it is clearly distinct and cannot be considered conspecific with that 

 species. 



HADENOECUS GrOUp 



Diagnosis. — Propod of gnathopod 1 relatively large, palmar mar- 

 gin convex, armed \vith a double row of 10 to 14 spine teeth; posterior 

 margin with several sets of setae. Propod of gnathopod 2 about 

 equal in size to that of gnathopod 1 but not quite as broad; propod 

 palmar margin convex, armed \vith a double row of about 14 spine 

 teeth; posterior margin mth 4 or 5 sets of setae. Pereopods rela- 

 tively long in proportion to body length. Coxal plate of pereopod 4 

 large. Bases of pereopods 5-7 broad, produced posteriorly; posterior 

 margins of 6 and 7 broadly convex. Abdominal side plates: posterior 

 margins somewhat produced posteriorly; posterior corners of plates 1 

 and 2 slightly recessed and possessing 1 setae each, that of plate 3 

 distinct and without a seta. Telson subrectangular; apex sometimes 

 with a shallow excavation, armed with 13 or more spines. 



Relationship. — This poorly known group is possibly more closely 

 allied to the fiagellatus group than to any other in the genus, but differs 

 significantly from the latter in the size of coxal plate 4, shape of bases 



