80 MARINE SHELLS. 



RiSSOa punetura, Mont. Guernsey (Br. Con.) Common dead; rare living 

 (Tomlin). Alderney, in rockpools alive, rare ; common in shellsand 

 (Marquand). Var. diversa, Jeff. Guernsey, 20 fms. (Marshall). 



R. zetlandiea, Mont. Guernsey (Bailee). Guernsey and Herrn, occasional 

 dead, both on shore and dredged ; sometimes very fresh, but I have never 

 found a living specimen (Tomlin). Alderney, in shellsand, very rare 

 (Marquand) . 



R. COStata, Ad. Guernsey and Herm, common dead, rare alive (Tomlin). 

 Alderney shellsand, common (Marquand). 



R. parva, Da C. Abundant in the littoral zone in all the islands. Var. 

 interrupted, Ad. Guernsey, not common (Tomlin). Alderney, alive in 

 rockpools at Houmet ; frequent in shellsand (Marquand). 



R. ineonspieua, Aid. Guernsey and Herm, not common (Tomlin). Alder- 

 ney, frequent in shellsand (Marquand). Var. variegata, Mohr. Guernsey, 

 abundant (Marshall). 



R. albella, Lov. Guernsey (Marshall). 



R. membranaeea, Ad. Guernsey, not common, on Zoster a (Tomlin). 

 Alderney, rare in shellsand (Marquand). Var. minor, Jeff. Guernsey 

 (Marshall). Var. elata, Phil. Occurs singly (Tomlin). 



R. Violaeea, Desm. Guernsey (Br. Con.) In dredgmgs, dead only (Tomlin). 

 Alderney shellsand, frequent (Marquand). 



R. COStulata, Aid. Guernsey and Herm, littoral zone, not common (Tomlin). 

 Alderney, dead shells frequent (Marquand) . 



R. Striata, Ad. Guernsey and Herm, very common (Tomlin). Alderney, 

 common alive and dead (Marquand). Var. Candida, Marsh. . Guernsey 

 (Marshall). 



R. proxima, Aid. Dredged between Guernsey and Herm, very rare (Tomlin). 



R. Vitrea, Mont. Guernsey, 20 fms. (Marshall). 



R. puleherrima, Jeff. Channel Isles, not uncommon (Br. Con.) Alderney, 

 rather common alive in rockpools (Marquand). Var. pellucida, Marsh. 

 Guernsey, Sark and Herm (Marshall). 



R. fulgida, Ad. Guernsey, common on Zostera at Belgrave Bay, at extreme 

 low water (Tomlin). Alderney, abundant on small seaweeds in rockpools 

 (Marquand). Var. pallida, Jeff. Guernsey (Marshall). Alderney 

 (Marquand) . 



R. SOluta, Phil. Guernsey (Br. Con.) Channel Islands (Marshall). 



R. semistriata, Mont. Guernsey and Herm, under stones, alive singly ; 

 dead shells common (Tomlin). Alderney, generally distributed but 

 rather rare alive ; common in shellsand (Marquand). Var. pura, Jeff. 

 Guernsey (Br. Con.) Alderney (Marquand). Occasional (Tomlin). 



R. Cinglllus, Mont. Guernsey (Marshall). Alderney, common in the littoral 

 zone (Marquand). Herm (Tomlin). Var. rupestris, Forb. Locally 

 common, with the type in Alderney (Marquand). 



Hydrobia Ulvse, Penn. Occasional specimens in dredgings at Grand Havre, 

 Guernsey (Tomlin). Var. octona, L. Arnold's Pond, Guernsey (Br. Con.) 

 Also in the brackish ditches running across to Bordeaux Harbour 

 (Tomlin). 



H. ventrosa, Mont. Alderney, one specimen in shellsand (Marquand). Var. 

 decollata, Jeff. Guernsey (Jeffreys). Var. elongata, Jeff. Arnold's Pond, 

 Guernsey, associated with E. ulvce, var octona (Jeffreys, Marshall). R. 

 ventrosa is a fresh water species, and. therefore not properly entitled to a 

 place in this list. 



Barleeia rubra, Mont. Guernsey and Herm, very common dead ; rare 

 alive (Tomlin). Alderney, common alive in rockpools; abundant in 

 shellsand (Marquand). Var. unifasciata, Jeff. Guernsey (Marshall). 

 Alderney, more common living than the type (Marquand) . 



