80 THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 
Skull : Inches 
engthiofi mandible;-strarghtsrsacieci ci cise os siteee ee eee Eee eee eae 92.0 
te Pg a CUTER: a-spavetorsieyaroisysjsrs;4/n is apereiansielerepere keep CRRA Ie meee 101.5 
Depthyofimandibleyatithemmiddleseeer cee eenee ce eee eee eee eres 7.0 
Skeleton : 
Greatest: breadthvof atlas’... <omprcaeinclac ccc <a sale COC RE COO eee 18.25 
. og LSt, Umar yctorsterstencss sist scsi aicieie: sci afer atemeearoe ederlcve, See es erento 26.2 
Eleishtiofirst lumbarmeasinedspostenorly ener tase er eee eee eee Eee eee rere 16.00 
Depthiofcentrum’ ofsrst lumbar seen sseeee heise eee eee ee Ree ene eee 7.0 
Greatestibreadthvot rsticaudalenemme acs sleet eee eects RO eee 22.07 
Height of rst caudal, measured posteriorly, and including process for chevron........ 19.5 
Depth{of-centrum! ofrstrcaudaley ae .sr.ccriei tie oe stem arate ceteris eer 8.75 ° 
Breadth sof scapula. .cctaend «asec asus cise oor Ras erat RIE AI crore eee 30.0 
Depthiof Scapular: ossarcterevstr- econ cieie <assiei tain Wereieee Soleo om OM OER eae COTE 23.0 
Teng thrafsradius swathvepiphysessecera rete ee een enone EEC nen erent 15.0 
s SE SS NV LTO Ut Se, DMS Coty ove cav aisha anda: lera grees RTO Is es eee 14.0 
en naeeawith DURAN AGG BAAR AOE rey Gaara Ce ae ah A hese: Tea 
hemes fou te WIEOUL EMG M gh ctr coho Sart crshemtaeneene ies aaa mete ot rere chee 13.0 
Breadth! oferadiusvatidistalendisacm.cmsrs cere cones eee eae eer ee eee 10.5 
e ee A ne ee eee Ween Rene ar atid em ne AM MEE Oks 8.0 
Length: ofhumenisystratghtem-ne weve cre ratioe arc era orem eT ne ee 14.0 
The first vertebra with a perforated diapophysis is the 38th. The neural 
spine disappears on the 45th vertebra. The diapophyses are reduced to a 
mere swelling on the 41st vertebra; as distinct processes with concave anterior 
margins, the last are on the 37th vertebra. 
Genus RHACHIANECTES Cope. 1869. 
2. AGAPHELUS GLAUCUS Cope. 1868. 
“The California Gray Whale.” 
Lhachianectes glaucus (Cope). 1869. 
Original description : Proceedings, Academy of Natural Sciences, Phila., 1868, 
No. 3, June—Aug,, p. 159. Read June 23, 1868. 
Type-locality : Coast of California. 
Type-specimen: “A full set of baleen of one side of the maxillary” in the 
museum of Essex Institute, Salem, Mass. 
Cope’s original description of the California Gray whale was appended to 
a notice of the mythical “Scrag whale,” for both of which he established the genus 
Agaphdus. The description is so brief that it may be inserted here in full: 
“A second species of the genus [ Agaphelus| was to be found in the ‘gray 
whale’ of the coasts of California. The baleen of this species, compared with that 
* Twice one half. 
* Anterior. Height of arch and spine of 1st lumbar, 9} in.; of rst caudal, 9 in. 
