PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 25 
. PORCELLANIDEA. 
Porcellana Sigsbeiana A. M.-Edwards, Bull. Mus. Comp. Zool. Cambridge, viii, p. 
35, 1880. 
Station 940, off Martha’s Vineyard, N. lat. 39° 54’, W. long. 69° 51’ 
30’, 134 fathoms. 
A single male, which, as the following measurements show, is much 
larger than the specimens described by Milne-Edwards: 
Millimeters. 
Parsee UOTE CAN MYA Nees eae nce eile etaioavtalsints aiwsismaisia/niaiclsijaisiniv a cln sie)m/<iaia oiwasioce eae 13.0 
[raha Leah @pmnrer. 6 Sa Se BEBE aes EASE so necosoreoroo pag to SAdCSDe OnoCabie sersee 11.6 
Jeaiiven i GiPameclive clare bial os So eGR eS ORS AGH BES Ror egocre pebods saebos ere = 25.0 
IA OH CHE ae ole 15a asin a sic ala aeidadbaneee onadacunaea wad acna eleanor 6.6 
ADE CUP AID “Sb RSS S GSO AGE URGE AGE EGEES CSU HEES Bags sooner Geeeso coe pe spener 13.0 
PONE GT GLE LE Berea eR BE SSSS Soc e SOB SOed oe AGEs EAN ARGR BEES ace cease 4.8 
Lagan Gif GRY NITE ESS 206 GEE eB eriS S05 SHOE SOUS CEE N=0 ED SE Sniouonia qscesrsSeesne 5.0 
Met Eeth CHONDOU onctc cn cat cen vena co tneca ste mans cagwsnichness\den==s aeons 26.0 
Length of carpus. -...-.- 22. cceens acces concen conn cere n scenes cnc cns cnee soeeee 6.5 
SURES EINE AS Se a PRA es oR mtg een Ee rSe eeu 14.5 
EEE Bia iis oe hats toe an! om nisin oo Oa a aaa ww Panne a Saeeelee nos 5.7 
Ee EORTC LVS cece nate cloln alate ainios tos aise ae ania mine hana ai oawejaneinen amiesmora= 4.5 
LITHODIDEA. 
Lithodes maia Leach. 
A fine specimen of this northern species was taken at station 1125, 
off Martha’s Vineyard, N. lat. 40° 3’, W. long. 68° 56’, 291 fath., sand 
and mud. It gives the following measurements in millimeters: 
SER a cee OS DIRE ET OEE Peat aD ERA ep OEE ce en EE gay Sir els gre Bam g 
Length of carapax, including rostrum and posterior spines.......--...-.------ 83 
Length of carapax, excluding rostrum and posterior spines..-....-....---.---- 55 
Breadth of carapax between tipsof hepatic spines ..--- pehaa tes cnc ee cuca cee 47.3 
Breadth of carapax between tips of branchial spines..........-..----..0..-.- 76.4 
Greatest breadth of carapax, excluding spines ...-..---...---..------.--...-- 53.5 
EN PORLPINM fat ob oo nee ae on ecco soo secs ten sedans aewanlac chien wena e eae 26.5 
Pee MOM ont CHUOMIpPOlin saci 74-0 ccoaelsmew ea lcisce selon dame) = aie cee eee 86 
Meterotmiont Cl sins oo. se occice Saco cina cision ssa cleccee Seceeor@eecie soe eee 33 
Pe ME Cane DiC HOLA on SN ee ale niiacd= Sais nie win tapsp emeaas a vicmmign Ses aiiciciete LBA SE 
Peerenmien ULcy los. Of TICht Chola... so0 cis a acw ck oe pce eene cece cedaanneeae 18.6 
PPE EMREEL CHOUDOU Le J oc aa 4 xjaae's's sess Unita slnetseetce sap oey auecns aod eae 88 
PE PRIOCOHEIS waco. Sdn coe 2a sas An gin minseip aes qaensna ace veeae toaeMoaae 31 
MEME SIO HO) Be oe Sara Sslo bil che a was eae natune, so cae tan oan coke oebelp tes 8.8 
PPrPer Garb yins Of Lett CHES <i. asic ceeldeniide oiinci nce cwe coceececcasncmaceae 19 
Pee GthG AU DWIALOLY IER 52. 62. cece cnwsns maces oe nca> oc cunid Secisue acs 150 
Herriot second ambulaury leg... s,cceu sco cicadsce ssocem neem casece sac nce 155 
Pee se TAIT MP ULALOLY LOM os. — <5 occ cen cnu coe nec ecdodesencerwccaceoegeces 153 
Grestesuexpanse of ambulatory legs. <....---5 2 se ceaececlsscccs basccdaces's 325 
Lithodes Agassizii Smith, Bull. Mus. Comp. Zool. Cambridge, x, p.8, pl. 1, 1882. 
Two very small, immature specimens of this interesting species were 
taken off Martha’s Vineyard in 1881, station 1028, N. lat. 39° 57’, W. 
long. 69° 17’, 410 fath., yellow mud; and station 1029, N. lat. 39° 57/ 
6’, W. long. 69° 16’, 458 fath., yellow mud. Another immature speci- 
men. and two adult females were taken by Alexander Agassiz on the 
Blake, in 1880; the immature specimen at station 305, N. lat. 41° 33! 
