502 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 

 PILUMNUS LONGLEYI, new species 



Plate 202, Figures 4 and 5 



Type-locality. — South end of Loggerhead Key, Tortugas, Florida; 

 Aug. 10, 1924; W. H. Longley; one female (Cat. No. 62569); gift of 

 Carnegie Institution. 



Diagnosis. — Five antero-lateral spines of which the third is double. 

 Hepatic region spinous. Manus of both chelipeds rough and hairy 

 outside. 



Description. — Carapace covered with uneven hairs which are 

 shorter on the posterior half; underneath the hairs the surface is 

 rough with pointed granules, which also border the front. Hepatic 

 region armed above with several spines two of which are longer and 

 with dark tips. Regions deeply marked. Anterior and antero- 

 lateral margins together arcuate. Frontal lobes convex, bordered 

 with 8 or more granules some of which may be acute, but no spines; 

 lobes separated from each other and from the outer spine by a broad 

 V. Orbital margin spinous, spines unequal. Antero-lateral margin 

 5-spined; first two spines shorter, slenderer and nearer together than 

 the others; third spine bispinose; fourth and fifth longest; terminal 

 half of spines light brown. Subhepatic region granulate and with one 

 spine. 



Chelipeds and legs long-hairy. Chelipeds massive, very unequal; 

 two spines on upper margin of merus; carpus and upper part of manus 

 armed with stout spines; outer surface of manus covered with acute 

 or subacute tubercles. Major fixed finger short and broad, pre- 

 hensile edge with two large teeth above the point, followed by two 

 smaller ones; teeth of dactylus low, 5 or 6 in all, the 2 proximal ones 

 united and enlarged, the fourth may be equally large. Three longitu- 

 dinal rows of granules on upper surface of dactylus in basal third. 

 Fingers of minor cheliped slenderer, the fixed finger longer. Merus of 

 ambulator}^ legs 1 to 3 armed with a row of spines above, carpus with 

 three rows, propodus with two rows. Last leg with a spine at distal 

 end of merus; carpus and propodus with a row of spines above and an 

 incomplete row on outer surface. 



Measurements. — Female (62569), total length of carapace 11.4, 

 width including spines 16, width excluding spines 15, fron to-orbital 

 width 10.4, width of front between antennae 4.8 mm. The male 

 (60955) measures 17.4 mm. in extreme width. 



Young. — Small specimens are rougher and more spinous, spines 

 white; there may be 3 superhepatic spines, one protogastric spine 

 near by, and 4 or 5 smaller epibranchial spines. 



Relation. — This species is easily confounded with sayi and cari- 

 baeus, which it resembles in general appearance, but can be told (1) by 

 the antero-lateral spines 5 in number, or 6, counting as 2 the spines of 

 the constantly bispinose third spine, whereas in sayi the spines are 



