ATLANTIC AND CARIBBEAN PYCNOGONIDA—HEDGPETH 255 
3. Lateral processes not separated by their own diameter; scape shorter than neck. 
latipes (p. 256) 
Lateral processes separated by their own diameter; scape as long as neck. 
colei (p. 257) 
ASCORHYNCHUS ARMATUS (Wilson) 
FIGuREs 42, a; 43 
Scaeorhynchus armatus Wiuson, 1881, pp. 248-249, pl. 2, figs. 3, 4; pl. 5, figs. 
26-31.—VERRILL, 1885, p. 560, fig. 171. 
Ascorhynchus agassizi BouviER, 19387, p. 38. 
Ascorhynchus armatus HepGprtuH, 1943b, pp. 49-50.—NEEDLER, 1943, p. 15, 
fig. 19, a-e. 
ALBATROSS RECORDS 
Station Number of 
Nol Date Lat. N. Long. W. | Depth specimens 
° , dA ° , ” Fathoms 
DOUTAR SGD taios: (Geos. a. ote ees eA EER ET ee 41 43 00 65 21 50 1, 309 6 
OTM BOD UTA S80 te.2 2 3. See 2. o Sen eS se ee 41 09 40 66 02 20 1, 255 2 
DUS SOD GON Leeda ee re tae hee ew Seo 40 16 40 67 05 15 1, 290 1 
SOAR) lids hb Paegy Ui hole: ER a I ee ey ere aie 39 35 00 71 18 45 1,073 2 
2700 | AUST 2h ASSO S es Ss a oe SEP he 8 41 28 30 65 35 30 1, 188 2 
OF PAR Ne O Ye ne? BS Le aS ee eee ee eee 36 34 00 73 48 00 1, 374 2 
il 
ial OCs 20; 1S00ren a= seen n es eee Renee eee oe 36 45 00 74 28 00 781 
About half of this material was sent to me for examination; the 
specimens are all large (about 15 cm. in extent) and show little varia- 
tion. Wilson’s description of the male oviger is brief and unsupported 
by a figure. 
Ascorhynchus agassizi Schimkewitsch (1893, pp. 36-39) from the 
Pacific side of the Isthmus of Panama is very close to A. armatus, 
especially to the smaller specimens taken in relatively shallow water 
north of Cuba. Some of these specimens, as I have previously noted, 
are minutely setose and have small chelae. The principal difference 
between the Atlantic and Pacific species seems to be in the structure 
of the male oviger. According to the figure given by Schimkewitsch 
(loc. cit., pl. 2, fig. 18), the hairs in the tuft at the end of the sixth 
joint of A. agassizi are heavier and differently arranged than in A. 
armatus. Also, the denticulate spines on the terminal segments appear 
to be shorter and thicker in A. agassizi. These differences may be the 
fault of the artist or the angle from which the structure was examined. 
All the known male specimens of A. agassizi are types and unavailable 
to me for examination. 
Bouvier’s identification of Ascorhynchus agassizi from the west 
coast of Africa is probably an error for A. armatus. It is published 
without comment as to its size or general appearance. Possibly the 
specimen is of the smaller type as taken by the Atlantis north of Cuba. 
This record would indicate that the species is generally distributed in 
the North Atlantic Basin. 
