Sternum triangular, narrower in males than in 

 females, smooth, a little pubescent in grooves. 

 Male with a strong, shelf like protuberance on 

 sternite between last pair of legs, and with a 

 strong sharply ridged shoulder extending over 

 genital pore. Female with a low eminence on 

 sternite between last pair of legs. 



Measurements. — Ovigerous female: length of 

 carapace, 24 mm., width, 26 mm.; abdomen, 

 length, approximately 50 mm. 



Habitat.— Thirty to 100 fathoms. 



Type locality. — South of Dry Tortugas, Fla. 



Known range. — Off Cape Hatteras, N.C., 

 through Gulf of Mexico and West Indies to State 

 of Sao Paulo, Brazil. 



Remarks. — Ovigerous females have been taken 

 off North Carolina in June. 



Genus Scyllarides Gill, 1898 



Gill, 1898, p. 99. — Verill, 1922, p. 18. (rev.). — Hemming, 

 1958b, p. 94. 



Scyllarides nodifer (Stimpson) 



Figure 77 



Scyllarus nodifer Stimpson, 1866, p. 48. — Stimpson, 1871b, 

 p. 123. 



Scyllarides americanus Verrill. 1922, p. 24, pis. 5-6. 

 Scyllarides nodifer: Holthuis, 1960b, p. 153. 



Recognition characters. — Carapace longer than 

 wide, subtruncate in front, coarsely and unevenly 

 granulate, granules elevated, not crowded, each 

 surrounded by more or less complete circle of 

 stiff hail's; anterolateral corners forming nearly a 

 right angle terminating in an obtuse tooth; cervi- 

 cal notch and groove well marked with numerous 

 denticles on margin in front of and behind notch ; 

 posterior transverse groove deep and conspicuous ; 

 gastric area with a large, broad-based, prominent 

 median ridge divided into a smaller anterior and 

 larger posterior part, each portion ending in an 

 anterior, large, conical, obtuse or bilobed tubercle 

 with other similar but smaller tubercles and coarse 

 granules around and behind apex; cardiac region 

 with a prominent hut less elevated area with 

 larger tubercles than on adjacent surface; a 

 similar ridge on each branchial area. Orbits 

 large, with prominent, thick borders, anterior 

 notch wide and deep. 



Antennae with distal article broader than long, 

 edges broadly and evenly rounded, minutcU 

 lobulate and crenulate, fringed with short, close 

 haii-s; exposed portion forming a half oval, upper 



side covered with small, rough granules and small 

 pits bearing tufts of short hairs in large adults, 

 smoother in small individuals. Penultimate mov- 

 able article showing two lobes beneath. Second 

 movable article distinctly wider than long, 

 broader than distal article; distal lobe terminat- 

 ing in nearly right angled point in large adults, 

 armed with a spine in smaller specimens; edges 

 dentate with many small teeth and some larger 

 ones, a larger stout tooth near inner curve of 

 inner margin; inner lateral lobe stout, thick, en- 

 larged toward end; inner edges of these lobes of 

 both antennae separated by a space about equal 

 to orbit of eye. First movable article irregularly 

 four-lobed above; small outer lateral lobe with 

 about three denticles; median or distal lobe 

 swollen and coarsely granular; inner lobe ob- 

 liquely oblong with inner edge truncate and 

 denticulate; prefrontal or rostral lobe a little 

 broader than long, widest distally, swollen 

 laterally, with concave sides and a median groove. 



Outer maxillipeds large, basal articles stout. 

 Legs projecting beyond carapace; first pair 

 stouter than others, propodus considerably swol- 

 len, dactyl stout ; fifth pair with propodus most 

 slender; merus and carpus of all pairs, except 

 carpus of first, with a finely serrulate carina end- 

 ing in a sharp distal tooth; carpi, except first, 

 with a lateral carina ending in a distal tooth; meri 

 of last four legs with a ventrolateral carina end- 

 ing in a sharp spine distally (carina sharpest on 

 legs three and four) and each with a blunter 

 medial spine distally. 



Underside of bases of legs and sternum roughly 

 sculptured, one larger acute or pyramidal eleva- 

 tion on sternum opposite base of each leg. 



Abdomen strongly sculptured, elevated areas 

 coarsely granulated and hairy, much like cara- 

 pace. Second to fourth segments with a median, 

 elevated, obtuse ridge, covered with large gran- 

 ules; fifth segment with slight ridge. Pleura 

 large, angular; that of second segment largest, 

 subacute, both edges with dentations about as 

 large as adjacent granules; those of third to 

 sixth segments more minutely dentate on posterior 

 border, nearly smooth or minutely crenulate on 

 anterior border. Telson broader than long, sub- 

 t ruinate distally; posterolateral angles broadly 

 rounded: granulated and hairy proximally, 

 covered with numerous forked ridjjes and grooves 



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