PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 355 
scarcely elevated above surface of jaw, resembling the lateral teeth of 
Heterodontus, but much smaller and without median crest. 
12-7-2-2-7-12 
Teeth ca. TELL 
We may note here, as further additions to the list of sharks on our 
Pacific coast, the occurrence of Somniosus microcephalus (Bloch) Gill 
in Puget’s Sound; of Lamna cornubica L. in Monterey Bay; and of 
a species closely related to Hulamia lamia (Risso) Gillin San Diego Bay. 
The shark recorded by us as Plewracromylon levis (Proc. U. S. Nat. Mus. 
1880, 52) is Rhinotriacis henlei Gill. This species is not a genuine Triacis, 
and it appears to us to be congeneric with P. levis, from which it differs 
in the greater development of the basal cusps of the teeth. 
Table of measurements. 
Species, Hexanchus corinus J. & G.; sex, 2. Locality, Neah Bay, Washington Territory. 
Inches | 100ths 
and of 
100ths. | length. 
LOSE GS HOT De one SoS Bb6 SESE BONS SO NOES BAQOOaD OO SS CON CO CODE EECOCT ESE CERErBOESsece 43% |e eee 
Body: 
Greatest height ............-..-...-... popossobescdosode éscoosrepscugucoocoConcastoljoopomess 8 
Head: 
(SATCU LEME Nhe Re Ree Cae SOC SCE CEE IAEE ua mee Sea aA i See ie ams seen teed |e se 16 
CmEntes bwiGth S25. ot oie Saree has cere sSedies act ees boaece sbsoecse sveteccseucbas|ecccomce 12 
WICTHOtAMiGrON WGA ALO a a= cae cs Sec c ool wns —nmaejocaeues stone coca ceecccsaa| recede. 9 
Wen op Ol ANON. sas seasslac ssc tkiea yea eisemiasi seve csssheaeevicres tidus decease Soes| Ses esas 54 
GNM OL CLe LOOM MMOL Me acs eciaiee seeisinn siclas ssinatice sie siceulawoniecincsces scnsescasc|Nacien = 6 
MIshsnce tronmevie LOSpPIrAClOl. saeelfeenisise = oneness eccnes Meaieles Soa sad steel. cece oS 5} 
TE OTreTINNG Hen OS Glee eee. (ae Sato cic cin cisisiela socio scons cacceuaccceeececisstasea|saacscies 14 
Dintaice sani amMontinGo; MOSUL 2-424 ese asewice 22 5c soce oo --thcasica See odes. ol aes es 4 
DST Se ORs ER bt LO DONE Meme sarees ia cic[ow sare «(aaa eeiniaia/sic(aig.n So ase melo sono mice sian e==ia| on seioct 7 
Dorsal: 
TOS at Cc OeELO ISN OU Geese aa eeeoania sais aneinoie ce sin einiani ales onasloc see onsemr ae ccaes|sinleseeae 53 
ManmuhnO MD Ase mmereeetee a= a alaaeeeaaee aoe ate oaas\s cca asc ce sere sonst coe coteeala tl Lin seee ne 4 
Greaexnibeleth Geman seme sane cccen cisco sss <iveese sos oe nels csecciscininncsecse suseent~-|ocescses 6 
Anal: 
LSID GEE LONG coc Gabe 2c es SD ASOD R COOL C RESCH Seen CEE BTCC eR COC OSES EE CE CCC SH Ea SERCEOee 6 
IERGAUES DINGIONG. seta lemmas sacs tone pda sdalsee estat ccceadswececccccsesectleelcaes Ssetesse 43 
Caudal: 
ILS 6 eécpacibacGeo ne Gbee SOROS FCoE SSE BBE CODES CEOC CH DECR EEE OOe ren SCOrSCoMeacral peiciorine 32 
Pectoral: 
MPV ee re stereo sie Giaisislalicc eas ccclesice cciccece acees ses Siaaciaaesscecis te seca teen toas ss s|teotee ae 12 
Ventral: 
MS eG EM IN Gesamte ates See aaa ee ae e soon oc ca Seiscabs acter seeeeas cnemetteccnacecosac|eecseseis 8 
INDIANA STATE UNIVERSITY, 
Bloomington, October 11, 1880. 
