MUSEUM OF COMPARATIVE ZOOLOGY. 197 
These differences, although slight, are constant, and should be recognized in 
our nomenclature, if any significance is attached to geographical variation. 
The last thoracic appendages are chelate in the adult female, while they are 
but imperfectly so in breeding males; that is, in the male the “thumb” is 
very much shorter than the index. 
Station 3353. 695 fathoms. 1 male. 
3592 1270 ke 1 female. 
“ = 3393. 1020 3 males, 3 females. 
33945) cour “ 12 males, 20 females. 
6) S418 660) 1 male, 1 female. 
“« 663419. 772 e¢ 1 female. 
Sit), SADA ir GAe iad +56 1 female ovig. 
Polycheles granulatus, sp. nov. 
Carapace long oval, broadest across the anterior branchial region; dorsal 
surface granulated, but nearly devoid of spines; there are two small rostral 
spines, and back of these, on the low granulated median carina, lies another 
pair followed by one or two spinules on the gastric area. The submarginal 
ridge is incurved and composed of minute spinulose granules. Orbital notch 
narrow, armed with a spine at its internal angle and with another at its ex- 
ternal angle. Marginal spines thus disposed : 9 (or 10) —3— 15. The an- 
terior abdominal pleure are rounded, gradually becoming acute as one passes 
backward to the sixth. The posterior thoracic legs in the sole specimen seen 
(a female) end in a small but perfect chela. 
Length, 99.5 mm.; length of carapace, 45 mm. ; greatest width of carapace 
37 mm.; length of cheliped, 118 mm. ; ischium, 19 mm. ; merus, 33 mm.; 
carpus, 22 mm. ; basal part of propodus, 14.5 mm.; dactylus, 22 mm, 
Station 3380. 899 fathoms. 1 female. 
Eryonicus czecus Batre? 
Station 3375. 1201 fathoms. 1 male, 62.5 mm. long. 
iE. nek Fae ae te SE 1 female, 40 mm. long. 
© \ SONS rn tGae ee 1 juv., 37 mm. long. 
“3388. Surface to 400 fathoms, submarine tow-net. 4 juv., 19-29 mm. 
long. 
Bate’s description of EZ. cecus was drawn up from a single immature speci- 
men, 13 mm. long, in which the first abdominal appendages were undeveloped. 
The largest of the “ Albatross ” specimens is a sexually mature male with well 
developed gonopods. It differs from Bate’s specimen in having much shorter 
spines upon the carapace and abdomen ; the spines of the lowest series on the 
branchial region decrease in length posteriorly, while in the type spceimen the 
posterior spines in this row are the longest. Whether these discrepancies are 
