2 Dr. P. P. Carppntpr on new Forms of Molhiaca 



cnllnsn, Brit. Assoc. Rep. 1857 (from fragments) : non Venus cnl- 

 losa (as of Conr.), Sow., live., Desh. 



Hab, Sta. Barbara [Xuttull, Jeivett) ; S. Pedro (Cooper) ; Cape 

 St. Lucas {Xtintus!). 



This section ditftrs from the typical CnUist(e as docs Merce- 

 naria from ['pniia. Whether the other pecidiarities of th»> spe- 

 cies (redfscrilx'd by llei've as CiUherea tiohi/is) are co{M(hiiate, 

 cannot yet be stated, as it stands alone. In sculpture and colour 

 it resembles Dusiiiui ; in its ponderous growth, Pnchijdesina. 



1 10. Lnzaria suhqiiadrafa. 



L. testa exfn« Carditte varieyrita \\\n. sirnili ; pallicl ', ra'stanon tinrta; 

 sub(piadrata, antice tiuiicata, subregiilariter veiitricosa, dorsaliter 

 tumula ; cojtis ra(Iiaiitil)U'i circ. xiv.-x\i., tumidis, nodo"-!.*, dia- 

 goiialibus inajoiibus ; iiitL'r>titiis j)his nunusve iiisculptis : iiitu*, 

 valva dextra dente cardinali triaiigulari, inter duas foj^sas sito, hand 

 eloiigato ; dent. lat. acardiiie separatis, ant. extante, post, oljsoleto, 

 calloso : v. sinistrali dent. card. ii. angustis, subicfpialibus, radi- 

 antibus ; lat. ant. et post, extaiitibus : cicatr. adduct. subrotuu- 

 datis. Long. ".S", lat. •'2.'), alt. '34. 



Hul). Sta. Barbara (Jcircft) ; Monterey, and along the coast to 

 S. Pedro (State Coll. no. -103} [Cuojjer).' 



The outside of this remarkable little species is typically Car- 

 ditoid; the hinge is intermediate betweeu Lazaria and Cijpri- 

 cardia. 



1 3.2 . Modiola forracata. 



M. testa curta, laevi, latiore, maxime fornicata; pallide cnrnoa, en?- 

 dermide rufo-fusca, rusis increnienti et iiicru-tatione deiisissime 

 pilosa induta; umbonibus niaxitnis, spiralibus, antice torsis, per 

 tres quadraiites totte latitudiiiis dcvectis ; area ligaineiitali curtis- 

 sinia, arcuata; margine dorsali antice nullo, pnstice longo, arciiatn; 

 margine ventrali recto, vix propter bys>utn hiante ; politico Into, 

 antico ansu-ito ; altitudine dorsaliter valde eltvata, vcntraliter 

 plane deeli\ i, cunciforini ; utnbonibus trans margiiieiii anticuin per 

 eextantein totius longitudiiiis excurrentibus : inlus, sub umbonilius 

 excavata ; cicatr. adduct. ant. ventraliter sita. Long. \'A, lat. •7t), 

 alt. -95. 



Hab. Sta. Barbara [Jewett) ; Monterey ( Taylor). 



100. Pecten (?var.) (Pquisulcatus. 



i*. testa P. rentricoso siinili, sed tenuiore, minus ventricosa ; costig 

 pmribus nngustioribus xx.-xxi. ; interstitiis (pra^cipue valva su- 

 periore) fere eequalibus ; auriculis niagis pro(luctis, acutis; sinv 

 serrate: testa juiL iuterstiliis alte iusculptis, lixuiinis cciiceutrkii 



280 



