WILLIAMS and CHILD; COMPARISONS OF SOME BOX CRABS 



nular peduncles; ocular peduncles short and thick, 

 granulated above; orbital margins slightly raised 

 above surrounding region, mean maximal inter- 

 orbital distance 0.50 mean maximal span between 

 major posterolateral spines (Fig. 2H, TV = 7, SD = 

 0.051). 



Palm of chelipeds with ornamentation on exten- 

 sor surface obscurely arranged in horizontal zones; 

 lower margin granulate, sharply so in proximal 3/4; 

 lower 1/3 of surface coarsely granular, becoming less 

 sharply so as it merges into central zone; upper 2/3 

 bearing obscure diagonal rows of obsolescent tuber- 

 cles in central portion, but stronger and less regu- 

 larly arranged tubercles near base of dorsal "cocks- 

 comb"; a spine near proximoventral corner in line 

 with subdistal row of ragged, forward trending 

 spines on merus. Pereopods with flexor surface of 

 ischium and merus strongly but irregularly spinose; 

 carpus bearing biserial row of smaller spines on ex- 

 tensor surface. 



Abdomen of each sex broadest at segment 3; lat- 

 ter fused with narrower segments 4 and 5 in male, 

 segments in female relatively broader but essentially 

 linear and free; segment 2 trilobed, less so in female 

 than in male and bearing obsolescent granules close- 

 ly clustered or fused on lobes, segment 3 with much 

 lower relief and obsolescent granules clustered 

 mainly on lobes; telson subtriangular. Male pleopod 

 1 rather stout, slightly curved and conically elon- 

 gate, tapering to narrow distal opening; pleopod 2 

 with slender stylet divided into 2 parts, gently 

 curved proximal part stronger than distal part 

 curved mesially upon itself as a rather closed crook, 

 distal half of crook extending beyond tip of pleopod 

 and recurved near tip. 



Known range.— Japan, Philippines, the type local- 

 ity north of Admiralty Islands (Sakai 1976), 141-349 

 m for specimens studied. 



Measurements in mm.— Carapace: smallest o" 

 length 18.2, maximum anterior width 17.3, max- 

 imum span across posterolateral winglike projec- 

 tions 15.4; same, largest c, 53.2, 53.3, 47.8; small- 

 est 9, 21.3, 19.9, 17.7; largest 9, 45.6, 44.8, 40.4. 



Remarks.— The two species oiParacyclois, basic- 

 ally similar in carapace outline, have relatively 

 larger eyes and orbits than the two species of Calap- 

 pa discussed above (Fig. 2), and the orbits in fron- 

 tal view are less elevated above the plane of the 

 anterolateral margin. Interorbital width expressed 

 as percent of maximum span across the postero- 

 lateral projections is virtually the same in samples 



of the two species (P. atlantis, N = 20, x = 0.494, 

 SD = 0.044, Fig. 2G; P. milneedwardsii, N = 10, 

 X = 0.496, SD = 0.051, Fig. 2H). Spination of the 

 posterolateral projections is much more slender and 

 remote than in either Calappa or Cyclozodion, and 

 well-developed spination on the chelipeds and ven- 

 tral margin of the ischium-merus of the fifth legs 

 clearly sets them apart from species of these genera. 

 Distribution in two well-separated centers, western 

 Indo-Pacific and Caribbean, seems to reflect an an- 

 cient Tethyan track. 



Calappilia A. Milne Edwards 1873 



Calappilia A. Milne Edwards 1873:434.— Rathbun 

 1930:7. -Glaessner 1969:R494 (part, not Paracy- 

 clois). 



Ross and Scolaro (1964) summarized scattered 

 references to fossil species of Calappilia known up 

 to that time, Glaessner (1929) compiled a listing and 

 an overview (1969), and Quayle and Collins (1981) 

 gave notes along with description of an additional 

 species. We reviewed all references to these species, 

 and examined selected species (*) in the paleon- 

 tological crustacean collection of the USNM in order 

 to compare features of Calappilia with those of 

 other genera treated herein. 



Five species of Calappilia are known from the 

 western hemisphere: *C. hondoensis Rathbun 1930, 

 Upper Eocene, Calif.; C. bonairensis Van Straelen 

 1933, Upper Eocene, Bonaire, Netherlands, West 

 Indies; *C. diglypta Stenzel 1934, Middle Eocene, 

 Tex.; C. sp.? Roberts 1956, Lower Eocene, N.J.; *C. 

 brooksi Ross and Scolaro 1964, Upper Eocene, 

 Fla. 



Seven species and one variety are known from 

 Europe: C. verrucosa A. Milne Edwards 1873, the 

 type species, and C. sexdentata A. Milne Edwards 

 1876, Middle Oligocene, SW France; C. perlata 

 Noelting 1885, Lower Oligocene, Germany; C. in- 

 cisa Bittner 1886, Middle Eocene, Italy; C. dacica 

 Bittner 1886, Middle-Upper Eocene, Hungary; C. 

 dacica var. lyrata Lorenthy and Beurlen 1929, 

 Upper Eocene, Hungary; C. vicetina Fabiani 1910, 

 Upper Eocene, Italy; C. scopuli Quayle and Collins 

 1981, Upper Eocene, England. 



Two species are known from the East Indies: C. 

 bomeoensis Van Straelen 1923, Middle Eocene, 

 Borneo; C. bohmi Glaessner 1929, Upper Eocene, 

 Java. 



Diagnosis.— For purposes of comparing Calap- 

 pilia with Calappa, Cyclozodion, and Paracyclois, 



119 



