7212 Mollusks, 



the dredge off Fintry Bay, Curabrae ; and in shell-sand from " Lauds- 

 borough's Bay." 



C. clalhrata. The Parthenia clatbrata of Jeffreys is included by 

 Dr. Landsborough among the Lamlash shells. 1 do not know what 

 shell Dr. Landsborough can refer to under that name. The specimen 

 of C. clathrata in my friend Mr. Jeffreys' cabinet still remains, I 

 believe, unique as British. 



C. eximia. Mr. Bean discovered among Lamlash shell-sand a shell 

 which he referred with doubt to Rissoa Balliae of Jeffreys, which is 

 synonymous with Chemnitzia eximia {vide Lands. Excur. Arran. 

 p. 363). Subsequent observation has not confirmed this surmise. 

 Odostomia conoidea. Lamlash, Landsborough. 

 O. unidentata. Common in Lamlash Bay shell-sand, and I have 

 likewise taken it alive. 



O. plicata {Turbo plicatus). Bute, Smith. 



O. turrita, Jeffreys. Alive in rock pools at the outer Allans, Cum- 

 brae, and Clachland Point, Arran ; and dead in shell-sand in Lamlash 

 Bay. Perhaps this is the shell which Mr. Smith took at Bute, and 

 recorded as Turbo plicatus. I have not yet met with that species in 

 the district. 



O. eulimoides. Frequent on the wings of Pecten opercularis, 

 dredged on the bank near the Tan Buoy, Cumbrae. The Pectens are 

 covered with an encrusting red sponge, which Dr. Bowerbank will 

 describe in his Monograph about to be published by the Ray Society 

 under the name of Halichondria favinaria. The Odostomise appear to 

 feed upon this sponge. 



O. eulimoides, var. b, Jeffreijs {Turbo pallidus, Mont.). This well- 

 marked form is frequently found among Lamlash sand. 



O. rissoides. Occasionally alive in rock pools, and dead in shell- 

 sand, but generally small. 



O. albella {Lover). Alive among coralline in rock pools at Clach- 

 land Point. This would certainly seem more distinct from O. rissoides 

 than many other described species. 



O. cylindrica. Occasional. One large specimen from Lamlash 

 shell-sand I was inclined to think might be distinct, but Mr. Jeffreys 

 refers it here. 



O. interslincta. Not uncommonly laken in rock pools, and with the 

 dredge. The Odostomia costata of Bean, which he took in Lamlash 

 Bay, is merely an elongated form of this species. 



O. spiralis. Alive in rock pools at Cumbrae. Dredged off" Fintry 

 Bay, and near the Clerk Rock, Cumbrae. Dead in Lamlash shell- 



