. Bulletin - United States National Museum. Science. 126 BULLETIN 129^ UNITED STATES NATIONAL MUSEUM branchial region; also a short spine on subhepatic and on pterygosto- mian region. Rostrum formed of two rounded lobes separated by ' a shallow notch; its margin and the supraorbital margin denticulate. Abdomen and sternum granulate, except for a transverse smooth area between bases of chelipeds. Chelipeds a little longer than carapace, spinulous; ischium with a distal spine; manus slightly compressed; fingers nearly as long as the palm, gaping for nearly their whole length, a large tooth in mi
. Bulletin - United States National Museum. Science. 126 BULLETIN 129^ UNITED STATES NATIONAL MUSEUM branchial region; also a short spine on subhepatic and on pterygosto- mian region. Rostrum formed of two rounded lobes separated by ' a shallow notch; its margin and the supraorbital margin denticulate. Abdomen and sternum granulate, except for a transverse smooth area between bases of chelipeds. Chelipeds a little longer than carapace, spinulous; ischium with a distal spine; manus slightly compressed; fingers nearly as long as the palm, gaping for nearly their whole length, a large tooth in middle of pollex. Female: Carapace narrower behind and wider in front than male, tuberculation more uniform, spines less frequent. First ambulatory leg very little longer than second, about one and a half times length of the carapace. Abdomen tuberculate or granulate. Variations.—This species shows wide vari- ations from the type. Stimpson described a single male from south of the Tortugas as having tubercles on the protuberant parts of the cara- pace and the first segment of the abdomen. Two males out of five from the Tortugas (47069 and 47070) resemble Stimpson's in having four carapace tubercles but differ in having an ab- dominal spine. From this there are all varia- tions of roughness, from five spines in place of tubercles, on the one hand, to no tubercles or spines at the summit of elevations on the other. The different combinations of variations in this character are shown in the list of specimens (pp. 124-125), under column "Variations," where the five prominences dealt with are the gastric, cardiac, and branchial (paired) regions and the first abdom- inal segment. Unique is one female out of three (23110) which bears a median intestinal spine, no enlarged tubercle or spine on abdomen and four tubercles elsewhere. Measurements.—Male (47070), length of carapace to tip of rostral teeth , width mm. Female (19943), length 7, width 6 mm. Range.—From Cap
Size: 1114px × 2244px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
