Dr. 0. A. L. Murch — On the Crag of Iceland. 399 



I give here the measure of some individuals — 

 Long. 36 mm, ; alt. 33 mm. 

 „ 28 ,, „ 23 „ 

 „ 33 „ „ 28 „ Wood, tab. 7, fig. 1. 



45. Tellina (Macoma) calcarea, Chem. 



Tapes virgitiea, Forbes, Winkler, p. 203, ex figura. 

 Tellina sabulosa, Spgl., Mbrch, PaykuU. 



Kather common ; 28 mm. long, 19 mm. alt. 



46. Tellina [Macoma ?) prceienuis, Loathes. 



Tellina prcetenuis, Wood. p. 238, tab. 21, fig. 2. 

 Tellina, sp. Mbrch, Paykull. 

 Husavig, Spgl., Paykull. 



47. Cyprina Islandica, L. 



Cyprina Islandica, L., Morch, Paykull. 

 The large form is rather scarce. I give here the measures of 

 three individuals. 



Long. circ. 98 mm. ; alt. 85 ; crassities testae, 4| mm. 

 )> *^ >j 11 oy ,, ,, 4 ,, 



,, 66? „ „ 65 „ „ 3 „ 



48. Cyprina, sp. 



Cyprina Islandica, Nyst, p. 145, tab. ix., fig. 1. 

 „ „ Wood, p. 96, tab. 18, fig. 2. 



„ „ Winkler, p. 200. 



Cyprina Gaimardi, Robert, Mbrch, Paykull. 

 Cyprina Islandica, Deshayes. 

 In immense banks. The valves are always united and closed, 

 often with the ligament preserved, and with crystals of calcspar. 

 I am very much inclined to consider it a distinct species. A 

 similar dwarf form is found in Odensefjord, Fyonia, and, 

 according to Winkler, on the coast of Mecklenburg. Long. 

 73 mm., alt. 60 mm. 

 *49. Cyprina Gaimardi, Eobert. 



Cyprina Gaimardi, Robert, I.e. p. 285, fig. 51. 

 Probably the same as the following. 

 *50. Cyprina rustica, Sowb. 



Cyprina tumida, Nyst, p. 148, tab. 10, fig. la-c. 

 Cyprina rustica, Wood, I.e. p. 197, tab. 18 fig. la. 

 The right valve partly preserved. The length is about 45 mm. 

 and the breadth nearly the same ; diameter, 40 mm. ; the thick- 

 ness of the shell 4-5 mm. Cyprina LajonTcairii, Goldf., p. 237, 

 tab. 148, fig. 9, quoted by Dr. Winkler; seems to me not to 

 belong to this species. 

 *51. Astarte crebricosta, Forbes. 



Astarte Sjaltalinii, Winkler, I.e. p. 204. 



According to Dr. Winkler's drawing not sufficiently distinct a sp. 



52. Astarte compressa, L. 



Astarte elliptica, Brown. 

 A fragment seems to me to belong to this shell. 



53. Cardium ecliinatum, L. 



Cardimn echinaiicm, Winkler, p. 202, Mbrch, Payk. 

 Long. testEe circ. 55 mm. ; costae fere, 3 mm. lat^. 

 Dr. Paykull's specimen, with a part only of the shell preserved, 

 indicates a very thick- shelled variety. 



