FISHERY BULLETIN: VOL 75, NO 2 



terior end of keel, and minute spine at postero- 

 ventral angles. Telson (Figure 46A) pubescent 

 except for median sulcus and terminal portion; 

 sulcus deep anteriorly, increasingly shallow pos- 

 teriorly, ending before reaching lateral spines; 

 spines long, their length 1.6-1.9 basal width of 

 terminal portion; latter long, length 3.5-4.5 times 

 basal width; mesial ramus of uropod barely over- 

 reaching apex of telson, or exceeding it by about 

 0.15 of its own length; lateral ramus distinctly 

 surpassing mesial, and armed with small, disto- 

 lateral spine, projecting beyond contiguous distal 

 margin of ramus. 



Petasma (Figure 47 A, B) cincinnulate along 

 proximal 0.65 of median line; broad distal part 

 of ventromedian lobule strongly produced into 

 elongate, distally directed distomesial projection, 

 and short distolateral projection; entire terminal 

 margin of lobule spinulous; distal part of ventro- 

 lateral lobule heavily sclerotized, forming plate, 

 with border adjacent to ventral costa bearing 



FIGURE 46.— Telsons. A, Hadropenaeus affinis, 9 20 mm cl, 

 southwest of Bimini Islands, Great Bahama Bank. B, Hadro- 

 penaeus modestus, 9 19 mm cl, west of Isla de Providencia, 

 western Caribbean. 



320 



emargination delimiting basal part from subovate 

 terminal part; latter strongly inclined toward, 

 and partially covered by, ventromedian lobule, 

 and armed with minute spinules along ventral 

 margin; ventral costa with distal part free from 

 contiguous plate, bent outward and bearing spin- 

 ules on distalmost margin. 



Appendix masculina (Figure 47 C,D) with prox- 

 imal part broad, strongly produced mesially into 

 thickened lobe, and bearing long setae along 

 lateral margin; distal part narrow, strongly 

 turned laterally, with apical portion armed with 

 tuft of long setae; appendix interna shorter than 

 appendix masculina, narrow, sinuous, and bear- 

 ing apical tuft of long setae. Ventrolateral spur 

 large, subelliptical to paddlelike. 



Thelycum (Figure 48A, B) with median protu- 

 berance on sternite XIV subconical, its apical por- 

 tion directed anteriorly or ventrally and produced 

 into spinelike projection; protuberance situated 

 distinctly posterior to prominent, setose, paired 

 convexities of posteriormost part of sternite XIII; 

 longitudinal median keel on sternite XIII pro- 

 duced anteriorly into anteriorly directed blunt 

 tooth, its cephalic margin concave, its posterior 

 margin convex. 



Photophores.-Paired photophores situated on 

 posterolateral margins of sternites X through 

 XIII just mesial to coxae of first four pairs of 

 pereopods. 



Color-Color notes made by Lipke B. Holthuis 

 (pers. commun.) on a male caught southeast of 

 Georgetown, St. Vincent Island, at Pillsbury 

 stn 874, state that the shrimp was "uniformly 

 red, with darker bands parallel to the posterior 

 margins of the abdominal terga." 



The following description is based upon a 

 freshly caught specimen observed by me during 

 a 1969 cruise of Oregon II, south of Great Inagua 

 Island, Bahamas. Body translucent pinkish or- 

 ange, with gnathal appendages, and pereopods 

 reddish orange. Carapace with milky white sub- 

 triangular patch lying immediately dorsal to 

 hepatic spine, its broad base abutting cervical 

 sulcus; small, middorsal, diamond shaped mark- 

 ing (formed by white lines) just posterior to mid- 

 length of carapace; anterolateral sides of marking 

 continuing posterolateral^ in dorsalmost arm of 

 transverse, strongly sinuous, opaque white, nar- 

 row band; ventral arm of U-shaped dorsal portion 

 of band extending anteriorly to cervical sulcus, 



