176 Rev. A. M. Norman on the British Species o/'Typton. 



1849. Alpheus ruher^ Bell, Brit. Stalk-eyed Crust, p. 271. 



1850. Alpheus 7'uber, White, Cat. Brit. Crust, in Brit. Mus. p. 38 ; and 

 (1857) Pop. Hist. Brit. Crust, p. 112, pi. 8. %. 3. 



1863. Alpheus ruber, Heller, Crust, des siidliclien Europa, 274. 



This species may at once be distinguished from the pre- 

 ceding by the four longitudinal carinas of the larger and 

 greatly flattened hand. 



Three Cornish specimens of this species in my collection 

 have the right hand the greatly developed organ ; while a 

 Mediterranean example and also that figured by Bell have the 

 left the larger. 



The description of Cryptophthalmus ruber of Rafinesque 

 and Desmarest appears to be partly applicable to the last spe- 

 cies and partly to this. The words, however, " la plus grande" 

 (main) ^^ est a trois angles en dessous " cannot possibly be 

 reconciled with A. megacheles^ though they may be with A. 

 ruber J if what Milne-Edwards speaks of as the outer side be 

 viewed as the under. The Cryptophthalmus ruber of Costa is 

 unquestionably a synonym of the last species, and not of this. 



Hob. Falmouth (Cocks), Polperro (Laughrin), Mediterra- 

 nean (Milne-Edwards & Costa), Adriatic (Grube), Algerian 

 coast (Lucas). 



Typton sjmngicolaj Costa. 



1846. Typton spongicola, Costa, Fauna del Regno diNapoli, Crost. pi. 6 bis. 



figs. 1-6. 

 1856, PowtoweZ/a ^Z«6r«, Heller *, Verhandlungen des zool.-botan. Vereins 



in Wien p. 629, pi. 9. figs. 1-15. 

 1861. Alpheus Edwardsii^ Couch, Proc. Linn. Soc, Zoology, vol. v. p. 210 



(but not Alpheus Edwardsii of Audouin, nor that of Milne-Edwards). 

 1863. Typton sponyicola, Heller, Crustaceen des siidlichen Europa, p. 254, 



pi. 8. figs. 12-17. 

 1868. Typton spongiosus, Bate, Brit. Assoc. Rep. (1867) p. 283, pi. 3, 



fig. 1 ,' and Ann. Nat. Hist. ser. 4. vol. ii. p. 119. 



The genus Typton differs from Alpheus in having the eyes 

 free, and not concealed beneath the anterior portion of the 

 carapace, in the second instead of the first pair of pereiopods 

 being the more largely developed members, and in the mandi- 

 ble being without an appendage, whereas in Alpheus it is fur- 

 nished with a two-jointed palp. 



Seven or eight years ago, Mr. Laughrin, the intelligent 

 coastguardsman of Polperro, found within the oscula of Iso- 

 dictya palmata^ procured off that coast, some shrimps. Mr. 

 Couch gave an account of these in the Proc. Linn. Soc, 

 naming them Alp)heus Edwardsii ^ M.-Edw. One of these 

 specimens came into my hands ; and having compared it with 

 a specimen of Typton spongicola from the Adriatic, I found 



♦ Beitrag zur Fauna der Adria. 



