PELECYPODA. Moll. 95 
Plesiopectcn , n. subg. for Pectcn subspinosus, Schloth. ; Fischer (1) 
p. 944. 
MYTILACEA. 
Aviculim:. 
Crenatula picta, Grn., = C. pJicisicinoptera, Lmk., = C. a vie ular is, Lmk.; 
Cooke, (2) p. 138. 
Isognomon nucleus , Lmk., numerous species synonymised with this ; 
id. t. c. p. 138. 
Meleagrina muricata , Reeve. 8 species regarded as synonyms ; id. t. c. 
pp. 136 & 137. M. margaritifera, for parasites of, see p. 47, antea. 
Mulletia, n. subg., for Perna mulleti ; Fischer, (f) p. 956. 
Ncocatillus , n. subg. for Inoceramus lamarchi , Brong. ; id. t. c. p. 958. 
Vulsella. 3 species recognized ( V. lingulata, V. rugosa , V. spongiarum) i 
the remainder varieties; complete list given with notes: Cooke, (1), 
see also id. (2) p. 137. 
MYTILID2E. 
Dreissensia cochlcala } Kickx, living in the Amstel ; Pclsoneer (1). 
Liihodomus mageri , n. u., ■= L. deshaycsi ) Mayor, 1861 ( nee Dixon) ; 
Cossmann. 
Modiola lamarclciana , M. strangulala , n. spp. (= M. tulipa varr.), 
France, Locard, (1) pp. 493 & 600. M. fulgida , H. Ad., = M. philippina- 
rum, Haul. ; Cooke, (2) p. 140. M. tulipa found for first time north of 
S. Carolina ; Ford (1). 
Modiolaria camobita, Vaill., = M. marmorata } Forbes; Cooke, (2) 
p. 141. 
y Myoforceps, n. subg. for Lithodomus caudigcrus , Lmk. ; Fischer, (1) 
p. 969. 
Mytilopsis leucophceta , Con., found 200 miles up St. John’s River, in 
fresh water ; Wright, Couch. Exch. i, p. 27. 
Mytilus jjctasunculinus, n. sp. (= M. edulis var.), France ; Locard, (1) 
pp. 497 & 601. M. galloprovincialis , distinctness of species defended 
against Jeffreys ; Brusiua ; see also ICobolt (10). For poisonous mus- 
sels, vide p. 45, antea. For embryology sco Wilson. 
Tichogonia. Kuster’s monograph is continued by Kobelt (14) ; 25 specios 
are described and figured, 1 being new, T. ( Septifer ) siamensis , Siam, 
p. 19, pi. xv, figs. 8 & 9 ; T. and Septifer are grouped together as placed 
by Kiister, but Kobelt’s opinion regarding the generic position of each 
species is indicated. 
ARC AGE A. 
ArCIDjE. 
Area kraussi, Phil., = A. arabica, Forsk.; A. setigera , Reeve, = A. 
lacerata, L .: A. striata , Rv., = A. lactea, L. ; A. pygmcea i H. Ad., — A. 
