36 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
from the loss and reproduction of the limb, but in other specimens there 
are considerable differences in the form of the right chela which are 
apparently not the result of loss and reproduction, though it may be 
possible that all the cases of considerable variation in the form of the 
chele are due to this cause. The right chela is, in both sexes, usually 
very broad, half or more than half as broad as long, but in some speci- 
mens, aS shown in the second column of the table of measurements, it 
is much narrower, only about three-eighths as broad as long. 
The appendages of the second abdominal somite of the male are fre- 
quently very distinctly unequal in size, the right being longer than the 
left, but in many specimens they are exactly alike. The appendages ot 
the first somite are apparently perfectly symmetrical in all the speci- 
mens examined. 
The females appear to be a little smaller than the males, but appar- 
ently do not differ in the form or proportions of any of the cephalo- 
thoracic appendages. There are four well-developed biramus append- 
ages on the left side of the abdomen as in the species of Hupagurus, and 
the third, fourth, and fifth somites are each furnished with a diffuse 
dorsal tuft of long hairs. The eggs are nearly spherical and larger 
than in Hupagurus bernhardus, being nearly a millimeter in diameter in 
alcoholic specimens. 
In life the general color of the naked and exposed parts is pale, dull 
orange, darker at the tips of the ambulatory legs, without any of the 
conspicuous red markings characteristic of Sympagurus pictus. 
All of the carcinecia seen are formed by colonies of Hpizoanthus 
paguriphilus Verrill, which at first invest spiral shells which are finally 
absorbed by the basal ccenenchyma of the growing polyps. In some 
of the very small specimens the investing walls of the polyp are so thin 
that the form and markings of the inclosed shell are distinctly visible 
through them, but in all the larger specimens the shell is completely 
absorbed. 
Measurements. 
| Station— 
| 
947. | 947. 894. 947. 647. 
WOM me eehonm soe fost cacencie tae nea tela ae cee ioe Saemeniroeens fof fof 2 Q ron 
Menethifront to tip of telson) -- 2-22 --sc-~ seem cee see aes me 62.0 65. 0 38. 0 60. 0 60.0 
Length of carapax along dorsal line .--......-.....--.--.-.% 23.3 23.0 15. 0 18.8 22.5 
Breadth of carapax at basesof antenns 3 3.0 13.3 9.0 Lies 13.0 
Length of eyestalks...-..-. 6. 4 6.7 4.7 6.0 6.3 
Greatest diameter of eye . 1.2 1.3 1.0 1.1 12 
Length of right cheliped - 68.0 66. 0 41.0 48.0 50. 0 
Length of carpus.-.-...... 20.0 18. 0 11.0 12.5 13.0 
eno Mir Cela 45220 wah oi osama cs Aengliac eee aedao asmouneue herds 29.0 PY BRS 17.9 20.0 19.0 
IBTEAUHNVOPICNCIA: sence ecinnncuenteacinh cesta deme ceamen eae eet 15. 0 10.5 10.8 12.0 7.2 
Tenet hor actylus os. ~ ss ccacisment ee oe clde dee tae ce = oe eer 15.5 14.3 10.3 11.0 10.5 
en St hiOt Meru Chelped. on rcclsesee sees neecane sce see ee eeeaee 51.0 52.0 30. 0 35. 0 49.0 
Ten CUNOtCANDRA- cee aces acceceee ss ans ewe atss seen e neem net 12.5 13.0 7.0 9.3 13.0 
Benveth Onicnelaecacanascsaret sac ebeeteberecce es denteoneemenee 16.0 17.2 9.'9 11.3 15.7 
IBICACTHWOLONELA eos soso c cae ce tate nmeaccioe: bate sneneeeee ser 7.0 7.6 4.5 5.5 7.0 
Then wth OmoaCowlNs. vec ot- Sasso meh sinless ain oe steciainiane amotae 9.3 9.8 6.1 6.8 9v1 
Length of first ambulatory leg, right side............--...-- 98.0 | 100.0 58.0 63. 0 96.0 
DEnpebvOr Prapodusy secs cose houses ecccceacoen eee ee eee 23.0 23.0 | ~13.'0) | *2qgaee 23.2 
eneth OP UaACtylNSth.< ok alesis eee micawaeciindes eee asees 31.0 33.0 17.5 18.3 31.5 
