41 



lings, but also to a different generic group. Whether this 

 be identical with a described genus, or whether it is still 

 uncharacterized, is doubtful, and caunotbe decided until the 

 interior is known. Such valves have been identified with 

 Obulella PhilUpsi,Ilo\\ (Quart. Journ.Geol. Soc. xxi, p. 101-2, 

 f. 10 a-b, 1804, by Messrs. IIoll aud Davidson (1. c), which 

 has been figured by Davidson (Mou. Sil. Brach., pp. (52, 342, 

 pi. iv, f. 17-19, ISGo, and pi. 1, f. 25, 1870). Mr. Whitfield, 

 who kindly called the writer's attention to the dissimilarities 

 between Billings's figures, is of the opinion that 0. PhilUpsi 

 belongs to an undescribed generic group. 



f^ains>a§, Meuschen. Arthropomata. 1787. 



Mils. Gev. p. 438. Noa-binomial. (Cf. Zflflijjas, Huuipb.) 



LaiBJpas, (Humphrey) Anonymous. Arthropomata. 1797. 



Mns. Calonn. p. 45 (May). No diagnosis or references. First sp. 

 Aitomia ttrehraluJa, Lin. Ottier sj). are lihyuvhonella, Majcrlia, &c. 

 (= Terehraluta, Miiller. ) 



I^asBBptls, Sowerby. Arthropomata. 184S. 



Conch. Man. ed. ii, p. 169, lapsus, = Lampas, Huniphr. 



LaqsaeDBS, Dall. TerebratuUdw. 1870. 



Am. Jouru. Coucli. vi, p. 123, subg. Ttrebratella. Type Ttrehratula cali- 

 fornica, Koch, Dall, 1. c. pi. vii, fig./, 1)1. viii, fig. 9-10. 



lieiofi'Siyeiclaus, Hall. Bhynchonellidce. T~H^r^ 



13th Regent's Rep. p. 75. Types Atrypa quadricostata. Hall, 1. c. p. 86, 

 & Rep. Fourth Distr. N.York, p. 223, f. 2; and Atrypa viesacosialis, Hall, 

 1. c. p. 88 (Chem.) & Note on Foss. Chemung Group, p. C4, f. 1 a-b. Not 

 Liorhynchus, Rud. gen. Coleopt. (Cf. MeristcUa, Hall, 1862, not 1861. 



liCptaecaa, Dalraan. Strophomenidw. 1898. 



Kongl. Vet. Acad. Haudl. 1827, pp. 93, 94. First sp. p. 106, Producta 

 rugosa, Hisinger, Act. Holmije, 1826, p. 333. Dalman, 1. c. pi. i, f. 1,= 

 Anomitcs rhomhoidaJis, Wahl. Act. Upsal. viii, p. 65. (This aud L. dtpressa, 

 Dalman, second sp. p. 107, t. i, f. 2,-|-i. cuylypha, Dalman, third sp. 1. c. 

 p. 108, t. i, f. 3, a-h ; Hisinger sp. Bidr. Sver. Geogn. t. vi, p. 4 ,— are true 

 Strophomenas fide Davidson.) Fourth sp. 1. c. p. 109, t. i, f. 4 a-d. L. 

 iransversalis, Dalman, is taken by Davidson as type, 1853, pi. viii, f. 176- 

 180; 1856, pi. xii, f. 1-5. 



liCplaenaa, IM'Coy. Productidce. 1 844. 



Carb. Foss. Ireland, pp. 10."), 118. First sp. L. convolufa, Phillips, Pal. 

 Foss. Cornwall & Devon, p. 57, pi. 24, f. 96. In the diagnosis, however, 

 L. lata, von Buch, (=Chonetes striatcUa, Koninck, Mon. Chonetes, p. 200, 

 pi. XX, f. 5 a-rj), is mentioned in a way to indicate it as M'Coy's type. 

 (= Chonetes, Fisch.) 



