472 NOTES ON PROSOBRANCHIATA, 



In this arrangement I have included only those fossil species 

 of which I have been enabled to examine actual specimens. I 

 note, however, that Lotorium apenninicum, Sassi (the type of 

 Bellardi's subgenus Sassia), might, judging by Hoernes and 

 Auigner's figures (is), be included in my "quoyi'^-group. If this 

 is so, I cannot concede that the subgeneric name is a useful one : — 



Genus Lotorium. 



Typical group. 



L. lotorium, Linn. L. fetnorale, Linn. 



L. tigrinurtiy Brod. L. grandimaculatuin, Reeve. 



{L. miinsteri, Anton?) 



Group of L. cosiatum. 

 L. costatimi, Born. L. spengleri, Chemn. 



L. waterhousei, Angas. Z. chemnitziy Gray. 



L. barthelemyi, Bern. L. cutaceum, Linn. 



L. brasilianum, Gould. Z. tranquebaricum, Lamk. 



Z. chlorostomum, Lamk. Z. doliarium, Linn. 



(Z. africanum, A. Ad.; L. fossatum, Gould?) 



Group of Z. cingulatum. 



L. cingulatum, Lamk. Z. voigtii, Anton. 



Z. poulsfinii, Morch. 



Group of Z. j^iZeare. 



Z. pileare, Linn. Z. krebsii, Morch. 



Z. aquatile, Reeve. Z. intermedium, Reeve. 



Z. tnundum, Reeve. Z. gemmatum, Reeve. 



L.Jicoides, Reeve. Z. rubeculum, Linn. 



Z. durbanense, Smith. Z. beccai'ii, Tap.-Can. 



Z. veliei, Calkins. Z. lineatum, Brod. 



Group of Z. labiosum. 



Z. labiosum. Wood. Z. strangei, Ad. & Ang. 



Z. rutilum, Menke. Z. loroisii, Petit. 



Z. orientale, Nevill. Z. crispum. Reeve. 



