330 



BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Northwest of Tortiigas; lat. 24° 44' N., long. 83° 26' W.; 37 

 fathoms; April 2, 1877; station 10, U. S. Coast Survey steamer Blake; 

 1 male, type (2911, M.C.Z.). 



LOPHOPANOPEUS MACULATUS Rathbun 



Lophopanopeus maculatus Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 588, 

 pi. 42, figs. 10 and 11 (type-locality, southern part of Gulf of California, 8 

 fathoms, station 2824 [Albatross]; type, Cat. No. 21585, U.S.N. M.). 



Diagnosis. — Wrist slightly rough; legs somewhat cristate, merus 

 spinulous; terminal segment of male abdomen wider than preceding 

 segment. 



Description. — Carapace hexagonal, moderately convex, deeply areo- 

 lated; covered with very fine, depressed, scabrous granules. Front 

 narrow, advanced, thickened, emarginate, with a short closed median 

 fissure; lobes oblique, margin sinuous, granulate, outer angle trun- 

 cate, obtuse. Lobe 

 between superior 

 notches of orbital 

 margin truncate, not 

 produced. Exorbital 

 tooth small, second 

 lateral tooth well 

 marked though not 

 prominent, rounded; 

 third, fourth, and 

 fifth teeth dentiform, 

 subacute, fifth a little 

 smaller; sinuses sepa- 

 rating second, third, 

 fourth, and fifth teeth 

 continued by grooves 

 on carapace. Carapace granulate below; a suborbital tubercle. Inner 

 tooth of inferior orbital margin large, produced, thickened, blunt; 

 outer fissure deep, V-shaped. Proximal angles of third abdominal 

 segment of male acute, overlapping coxae of last pair of legs ; penult 

 segment nearly as long as wide, increasing in width distally ; last seg- 

 ment wider than preceding, free margin broadly arcuate. 



Chelipeds not very unequal, heavy. Arm trigonal, as broad as long, 

 superior margin denticulate; wrist slightly rugose, a distal groove and 

 two blunt inner teeth or tubercles, one above the other. Major palm 

 wider than its superior length, upper surface somewhat flattened, 

 low^er margin of whole propodus slightly sinuous; covered with large 

 and small punctae and fine granules which become larger and rougher 

 on the broad upper surface. Fingers wide, slightly gaping, and having 

 a few impressed, punctate lines; dactylus arched, a large basal tooth 

 and about seven small teeth; about six large teeth on immovable 



Figure 51.— Lophopanopeus maculatus, male, holotype, carapace 

 9.9 MM. WIDE. a. Abdomen, b. Dorsal view 



