MYTILUS. 



Species 3. (Mus. Cuming.) 

 Mytilus Afer. Myt. tedd trigono-ohlongu, posfice com- 

 pressd, vix angulatd, concentrice irregidariter striata, 

 aurantio-fmcd, lineis saturatioribiis acnte uiidatis ten- 

 tiginosd, extremitate posticd viridi. 

 The African Mytilus. Shell triangularly oblong, pos- 

 teriorly compressed, scarcely angled, concentrically 

 irregularly striated ; orange-brown, freckled with 

 darker zigzag lines, green at the posterior extremity. 

 (j.MELiN, Syst. Nat. p. 3358. 



Mytilus Africanm, Chemnitz. 

 Hab. Algiers. 



Readily distinguished by its orange-brown tone of co- 

 lour, freckled with zigzag markings. 



Species 4. (Mus. Cuming.) 

 Mytilus ungulatus. Myt. tedd elongato-oblongd, cras- 



iimmild, concentrice slriatd, latere postico sitbangulato. 



compresso, anlicl latiusculd, intense violaceo-nigrd. 

 The hooked Mytilus. Shell elougately oblong, rather 



thick, concentrically striated, posterior side rather 



angularly compressed, anteriorly rather broad ; dark 



violet-black. 

 LiNN/EUS, Syst. Nat. (Gmel. edit.) No. 12. 



Mytilus latus, pars ; Lamarck. 

 Hab. Conception, Chili ; Cuming. 



Of very large size, rather flat, straight on the posterior 

 side, obtusely angled in front, covered with a rich glazed 

 violet-black epidermis. 



Species 5. (Mus. Cuming.) 



Mytilus cojipressus. Myt. testa oblougo-ovatd, com- 

 pressd, concentrice irregulariter striata, latere postiri) 

 obtuse compresse angulato, intense olivaceo-castaned. 



The compressed Mytilus. Shell oblong-ovate, com- 

 pressed, concentrically irregularly striated, posterior 

 side obtusely comprcssly angled ; dark olive-chestnut. 



Philippi, MS., Mus. Cuming. 



Uab. ? 



A simple compressed species, of a bright olive-chestnut, 



inclining at the margin to greenish-black. 



