19 
B. Siphons separate , elongate, slender. 
Fam. 9. Tellinidce. 
Mantle lobes free. Pedal opening elongate. Gills two on each 
side, small, united. Lips very large, behind the foot. Shell oblong. 
Cartilage internal or external. Siphons very large, when contracted 
bent up between the hinder part of the mantle edge. 
а. Shell oblong, subequilateral. Hinder side with a fold. Hinge- 
teeth compressed. 
§ Cartilage marginal, exterior. 
1. Tellina. 
1. T. nitida, t. 320 a. f. 4, ?t. 322. f. 3. 
2. T. lucida, t. 320. f. 7- 
3. T. planata, t. 320. f. 1. 
4. T. fragilis, t. 320 a. f. 5. 
5. T. , t. 359. f. 5. 
б. T. donacina, t. 320 a. f. 8, 9. 
7. T. , t. 318. f. 4. 
8. T. Costae, t. 320. f. 2. 
2. PsAMMOBIA. 
1. P. vespertina, t. 321. f. 1, 2, & 6. 
2. P. tellina, t. 320 a. f. 2. 
3. P. pallida (fig. 4). 
4. P. polita, t. 319. f. 2 (Capsa). 
Fig. 4. — Psammobia pallida. 
a a, adductor muscles, ppp , pedal muscles. 
3. Diodonta. 
1 . D. fragilis, t. 320 a. f. 3, t. 321. f. 3, 4, 5. 
§§ Cartilage interior , in a cardinal pit. 
4 . Syndosmya. 
1. S. intermedia, t. 320 a. f. 1. 
2. ? S. Renieri, t. 372. f. 9. 
b. Shell oblong, compressed, rounded at the ends, rather gaping 
behind. 
5 . Sanguinolarja. 
1. S. rosea. 
c 2 
